1952 in paleobotany

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This paleobotany list records new fossil plant taxa that were to be described during the year 1952, as well as notes other significant paleobotany discoveries and events which occurred during 1952.

Mosses

Name	Novelty	Status	Authors	Age	Unit	Location	Notes
Archaeomnium arnoldianum[1]	Comb nov	jr synonym	(Steere) LaMotte	Miocene	"Carter Creek"	United States Oregon	A moss. Moved from Palaeohypnum arnoldianum (1947) Moved to Hypnites arnoldianum in 1980[2]
Archaeomnium brittoniae[1]	Comb nov	jr synonym	(Steere) LaMotte	Miocene	Latah Formation	United States Washington	A moss. Moved from Palaeohypnum brittoniae (1947) Moved to Hypnites brittoniae in 1980[2]
Archaeomnium brownii[1]	Comb nov	jr synonym	(Kirchner) LaMotte	Eocene Priabonian	Florissant Formation	United States Colorado	A moss. Moved from Palaeohypnum brownii (1947) First named Hypnum brownii (1898) Moved to Hypnites brownii in 1980[2]
Archaeomnium knowltoni[1]	Comb nov	jr synonym	(E. G. Britton) LaMotte	Eocene	Roslyn Formation	United States Washington	A moss. Moved from Palaeohypnum knowltoni (1947) First named Rhynchostegium knowltoni (1899) Moved to Hypnites knowltoni in 1980[2]

Ferns

Name	Novelty	Status	Authors	Age	Unit	Location	Synonymized taxa	Notes	Images
Athyrium crossii[1]	Comb nov		(Knowlton) LaMotte	Paleocene	Denver Formation	United States Colorado	Diplaiium mulleri (1874)	A lady fern species. Moved from Diplazium crossii (1930) First named Asplenium (Diplaiium) crossii (1890)
Cyathea branneri[1]	Comb nov		(Hollick & Berry) LaMotte	"Tertiary"		Brazil		A tree fern species. Moved from Hemitelia branneri (1924)
Cyathea pinnata[1]	Comb nov	jr synonym	(MacGinitie) LaMotte	Eocene	Ione Formation	United States California		A tree fern species. Moved from Hemitelia pinnata (1941) Synonymized into Cyathea inequilateralis in 1977[3]	Cyathea inequilateralis
Dryopteris claiborniana[1]	Comb nov		(Berry) LaMotte	Eocene	Yegua Formation	United States Louisiana		A wood fern species Moved from Goniopteris claiborniana (1917)
Dryopteris escheri[1]	Comb nov		(Heer) LaMotte	Miocene		Switzerland		A wood fern species Moved from Aspidium escheri (1855)
Dryopteris guyottii[1]	Comb nov		(Lesquereux) LaMotte	Eocene Priabonian	Florissant Formation	United States Colorado		A wood fern species Moved from Phegopteris guyottii (1908) First named Sphenopteris guyottii (1883)
Dryopteris heerii[1]	Comb nov		(Ettingshausen) LaMotte					A wood fern species Moved from Aspidium heerii (1865)
Dryopteris lesquereuxi[1]	Comb nov		(Berry) LaMotte	Eocene	Lysite Formation	United States Wyoming	synonymy Lastrea (Goniopteris) fischeri (1883) pro part Lastrea (Goniopteris) knightiana (1883) nomen nudum	A wood fern species Moved from Goniopteris lesquereuxi (1932)
Dryopteris ursinum[1]	Comb nov		(Unger) LaMotte	Miocene		Switzerland		A wood fern species Moved from Lastrea (Phegopteris) stiriaca (1855)
Dryopteris ursinum[1]	Comb nov		(Heer) LaMotte	Paleocene		Greenland		A wood fern species Moved from Aspidium ursinum (1869)

Cycadophytes

Name	Novelty	Status	Authors	Age	Unit	Location	Synonymized taxa	Notes	Images
Ctenis hamiltonensis[1]	Comb nov		(Hollick) LaMotte	Paleocene/Eocene	"Hamilton Bay flora"	USA Alaska		A Ctenis species. Moved from Anthrophyopsis hamiltonensis (1936)[4]
Zamites pollardi[1]	Comb nov		(Hollick) LaMotte	Paleocene	Fort Union Formation	USA Wyoming		A Zamites species morphospecies. Moved from Magnolia (?) pollardi (1899)

Conifers

Cupressaceae

Name	Novelty	Authors	Age	Unit	Location	Notes
Callitris helvetica[1]	Comb nov	(Heer) LaMotte	Miocene		Switzerland	A Callitris species. Moved from Widdringtonia helvetica (1855)
Juniperus linguaefolia[1]	Comb nov	(Lesquereux) LaMotte	Eocene Priabonian	Florissant Formation	USA Colorado	A juniper species. Moved from Sabina linguaefolia (1908) First described as Widdringtonia linguaefolia (1883)
Thuja naujatica[1]	Comb et sp nom nov	(Heer) LaMotte	Paleocene		Denmark Greenland	A hiba species. New species name for Thujopsis gracilis (1920) First described as Thuja (Thujopsis) gracilis (Heer) (1883)

Flowering plants

Nymphales

Name	Novelty	Status	Authors	Age	Unit	Location	Synonymized taxa	Notes	Images
Nymphaea leei[1]	Comb nov		(Knowlton) LaMotte	Paleocene	Raton Formation	USA Colorado		A waterlily species First described as Castalia leei (1917)
Nymphaea pulchella[1]	Comb nov		(Knowlton) LaMotte	Paleocene	Dawson Arkose	USA Colorado		A waterlily species First described as Castalia pulchella (1930)

Magnoliids

Name	Novelty	Status	Authors	Age	Unit	Location	Synonymized taxa	Notes	Images
Beilschmiedia portoricensis[1]	Comb nov		(Hollick) LaMotte	Miocene	Collazo Shale	USA Puerto Rico		A Beilschmiedia species. Moved from Hufetandta portoricensis (1928) First named Aniba portoricensis (1928)
Laurophyllum grandis[1]	Comb nov		(Lesquereux) LaMotte	Miocene	Neroly Formation	USA California	synonymy Laurus fremontensis (1930) Laurophyllum fremontensis (1941)	A lauraceous species. Moved from Laurus grandis (1883)
Lindera antiqua[1]	Comb nov		(Heer) LaMotte	Miocene		Switzerland		A spicewood species First described as Benzoin antiquum (1856)
Lindera dilleri[1]	Comb nov		(Knowlton) LaMotte	Miocene		USA Oregon		A spicewood species First described as Benzoin dilleri (1900)
Litsea lamarensis[1]	Comb nov		(Knowlton) LaMotte	Eocene		USA Wyoming		A Litsea species First described as Malapoenna lamarensis (1899)
Litsea lata[1]	Comb nov	jr synonym	(MacGinitie) LaMotte	Eocene	Ione Formation	USA California		A lauraceous relative First described as Neolitsea lata (1941) Moved to Cinnamomophyllum latum in 1977[3]	Cinnamomophyllum latum
Litsea praecursoria[1]	Comb nov		(Lesquereux) LaMotte	Paleocene	Fort Union Formation	USA North Dakota		A lauraceous relative First described as Tetranthera praecursoria (1883)
Litsea sagittata[1]	Comb nov		(Ball) LaMotte	Eocene	Wilcox Formation	USA Texas		A Litsea species First described as Malapoenna sagittata (1939)
Litsea sessiliflora[1]	Comb nov		(Lesquereux) LaMotte	Eocene	Wilcox Formation	USA Texas	Tetranthera sessiliflora (1878)	A Litsea species Moved from Malapoenna sessiliflora (1898) First described as Laurus sessiliflora (1874)
Litsea texensis[1]	Comb nov		(Ball) LaMotte	Eocene	Indio Formation	USA Texas		A Litsea species First described as Malapoenna sagittata (1931)
Ocotea alia[1]	Sp nom nov		LaMotte	Eocene	Wilcox Formation	USA Arkansas	Andromeda delicatida (of Hollick, 1899)	An Ocotea species A replacement name for Mespilodaphne coushatta (Berry, 1916) (1916)
Ocotea athenensis[1]	Comb nov		(Ball) LaMotte	Eocene	Wilcox Formation	USA Texas		An Ocotea species Moved from Mespilodaphne athenensis (1939)
Ocotea attenuata[1]	Comb nov		(Ball) LaMotte	Eocene	Wilcox Formation	USA Texas		An Ocotea species Moved from Mespilodaphne attenuata (1939)
Ocotea berryana[1]	Sp nom nov		LaMotte	Eocene	Lagrange Formation	USA Tennessee		An Ocotea species A replacement name for Mespilodaphne puryearensis (Berry, 1916) (1916)
Ocotea brazosensis[1]	Comb nov		(Ball) LaMotte	Eocene	Fayette Formation	USA Texas		An Ocotea species Moved from Oreodaphne brazosensis (1924)
Ocotea caudata[1]	Comb nov		(Berry) LaMotte	Eocene	Mount Selman Formation	USA Texas		An Ocotea species Moved from Mespilodaphne caudata (1924) Includes one subspecies moved from M. c. major
Ocotea collazoensis[1]	Comb nov		(Hollick) LaMotte	Miocene	Collazo Shales	USA Puerto Rico		An Ocotea species Moved from Aniba collazoensis (1928)
Ocotea coloradensis[1]	Comb nov		(Brown) LaMotte	Eocene	Green River Formation	USA Colorado		An Ocotea species Moved from Oreodaphne coloradensis (1934)
Ocotea columbiana[1]	Comb nov		(Hollick) LaMotte	Eocene	Lisbon Formation	USA Mississippi		An Ocotea species Moved from Mespilodaphne columbiana (1924)
Ocotea coushatta[1]	Comb nov		(Berry) LaMotte	Eocene	Wilcox Formation	USA Louisiana	Tetrantkera praecursoria (of Hollick, 1899)	An Ocotea species Moved from Oreodaphne coushatta (1916)
Ocotea culebrensis[1]	Comb nov		(Berry) LaMotte	Oligocene	Culebra Formation	Panama		An Ocotea species Moved from Mespilodaphne columbiana (1924)
Ocotea eolignitica[1]	Comb nov		(Hollick) LaMotte	Eocene		USA Louisiana		An Ocotea species Moved from Mespilodaphne eolignitica (1916) First named Andromeda eolignitica (1899)
Ocotea hispanioiana[1]	Comb nov		(Berry) LaMotte	Miocene	Arbitonite Group	Haiti		An Ocotea species Moved from Mespilodaphne hispanioiana (1922)
Ocotea inequilateralis[1]	Comb nov		(Berry) LaMotte	Eocene	Gosport Formation	USA Alabama		An Ocotea species Moved from Mespilodaphne inequilateralis (1924)
Ocotea intermedia[1]	Comb nov		(Berry) LaMotte	Eocene	Holly Springs Formation	USA Tennessee		An Ocotea species Moved from Mespilodaphne intermedia (1930)
Ocotea lancifolia[1]	Comb nov		(Lesquereux) LaMotte	Eocene Ypresian	Holly Springs Formation	USA Tennessee	Oreodaphne knowltoni (1929)	An Ocotea species Moved from Oreodaphne lancifolia (1934) First described as Sapindus lancifolius (1883)
Ocotea lithaeformis[1]	Comb nov		(Lesquereux) LaMotte			USA California	Oreodaphne heerii (1888)	An Ocotea species Moved from Mespilodaphne lithaeformis (1888)
Ocotea mississippiensis[1]	Comb nov		(Berry) LaMotte	Eocene	Holly Springs Formation	USA Mississippi	Laurus primigenia (of Hollick)	An Ocotea species Moved from Mespilodaphne lithaeformis (1916)
Ocotea obtusifolia[1]	Comb nov		(Berry) LaMotte	Eocene	Holly Springs Formation	USA Mississippi	Cinnamomum sezannense (of Hollick 1899)	An Ocotea species Moved from Oreodaphne obtusifolia (1916)
Ocotea pagosensis[1]	Comb nov		(Hollick) LaMotte	Paleocene	Animas Formation	USA Colorado		An Ocotea species Moved from Oreodaphne pagosensis (1924)
Ocotea palomarensis[1]	Comb nov		(Berry) LaMotte	Miocene		Mexico Oaxaca		An Ocotea species Moved from Mespilodaphne obtusifolia (1923)
Ocotea perseaformis[1]	Comb nov		(Ball) LaMotte	Eocene	Indio Formation	USA Texas		An Ocotea species Moved from Oreodaphne perseaformis (1939)
Ocotea praefracta[1]	Comb nov		(Ball) LaMotte	Eocene	Wilcox Formation	USA Texas		An Ocotea species Moved from Oreodaphne praefracta (1939)
Ocotea precoushatta[1]	Comb nov		(Berry) LaMotte	Eocene	Indio Formation	USA Texas		An Ocotea species Moved from Mespilodaphne perseaformis (1924)
Ocotea pseudoglauca[1]	Comb nov		(Berry) LaMotte	Eocene	Wilcox Formation	USA Louisiana	synonymy Laurus californica pro part (1888) Laurus socialis pro part (1888)	An Ocotea species Moved from Mespilodaphne pseudoglauca (1916)
Ocotea pseudoguianensis[1]	Comb nov		(Berry) LaMotte	Eocene	Wilcox Formation	USA Louisiana		An Ocotea species Moved from Mespilodaphne pseudoguianensis (1916)
Ocotea puryearensis[1]	Comb nov		(Berry) LaMotte	Eocene	Ackerman Formation	USA Mississippi		An Ocotea species Moved from Oreodaphne pseudoguianensis (1916)
Ocotea (?) ratonensis[1]	Comb nov		(Hollick) LaMotte	Paleocene	Raton Formation	USA Colorado		An Ocotea species Moved from Oreodaphne (?) ratonensis (1917)
Ocotea ripariafolia[1]	Comb nov		(Berry) LaMotte	Miocene	Forest Clay Formation	Trinidad and Tobago Trinidad		An Ocotea species Moved from Aniba ripariafolia (1937)
Ocotea salinensis[1]	Comb nov		(Berry) LaMotte	Eocene	Wilcox Formation	USA Arkansas		An Ocotea species Moved from Oreodaphne salinensis (1916)
Ocotea tertiaria[1]	Comb nov		(Berry) LaMotte			Costa Rica		An Ocotea species Moved from Goeppertia tertiaria (1921)
Ocotea texana (Berry)[1]	Comb nov	Homonym	(Berry) LaMotte	Eocene	Fayette Formation	USA Texas		An Ocotea species Moved from Mespilodaphne texana (1924) Homonym with Ocotea texana (Ball)
Ocotea texana (Ball)[1]	Comb nov	Homonym	(Ball) LaMotte	Eocene	Indio Formation	USA Texas		An Ocotea species Moved from Oreodaphne texana (1931) Homonym with Ocotea texana (Berry)
Ocotea viridiflumensis[1]	Comb nov		(Knowlton) LaMotte	Eocene	Green River Formation	USA Colorado		An Ocotea species Moved from Oreodaphne coloradensis (1923)
Ocotea wilcoxensis[1]	Comb nov		(Berry) LaMotte	Eocene	Wilcox Formation	USA Tennessee		An Ocotea species Moved from Oreodaphne wilcoxensis (1916)
Sassafras quilchenensis[1]	Sp nom nov		LaMotte	Eocene Ypresian	Eocene Okanagan Highlands Coldwater Beds	Canada British Columbia		A Sassafras species A new name for Sassafras cretaceum (Penhallow) (1906)
Umbellularia saliciformis[1]	Comb nov		(Knowlton & Cockerell) LaMotte	Miocene	Neroly Formation	USA California	synonymy Laurus similis (of Berry 1929) Leguminosites bonseri (1929) Quercus simulata (of Berry 1929) Umbellularia dayana (1937) Umbellularia oregonensis (1930) Umbellularia salicifolia (1939)	An California bay species Moved from Laurus saliciformis (1919) First named Laurus salicifolia (Lesquereux) (1883) L. salicifolia a jr homonym of Laurus salicifolia (Banks & Solander)

Monocots

Name	Novelty	Status	Authors	Age	Unit	Location	Notes
Cyperacites islandicus[1]	Comb nov		(Heer) LaMotte	Paleocene		Iceland	A Cyperacites morphospecies Moved from Cyperites islandicus (1868)
Exflabellaria[1]	Gen et 4 comb nov	Jr synonym	LaMotte				A palm leaf morphogenus Replacement genus for the homonym Flabellaria (Sternberg) (1822) Jr synonym of Palmacites Contained Flabellaria alaskana,[4] F. groenlandica, F. johnstrupi, & F. latania
Potamogeton orbus[1]	Sp nom nov		LaMotte	Miocene	Latah Formation	USA Washington	A possible pond weed species New name for referred "Potamogeton heterophylloides" fossils P. heterophylloides type specimens moved to Keteleeria heterophylloides (1940)

Basal eudicots

Name	Novelty	Status	Authors	Age	Unit	Location	Synonymized taxa	Notes	Images
Nelumbium crossii[1]	Comb nov		(Knowlton) LaMotte	Paleocene	Arapahoe Formation	USA Colorado		A lotus relative. Moved from Nelumbo crossii (1930)
Nelumbium protolutea[1]	Comb nov		(Berry) LaMotte	Eocene	Wilcox Formation	USA Mississippi	Nelumbo tenuifolia (of Berry, 1935)	A lotus relative. Moved from (1949) Nelumbites protoluteus First named Nelumbo protolutea (1917)

Superasterids

Name	Novelty	Authors	Age	Unit	Location	Synonymized taxa	Notes
Achras agnitionalis[1]	Comb nov	(Hollick) LaMotte	Miocene	Collazo Shale	USA Puerto Rico		A Manilkara species. Moved from Sapota agnitionalis (1928)
Arbutus xalapoldes[1]	Sp nom nov	LaMotte	Pliocene		USA California		A madrone. New name for "Arbutus prexalapensis" (1950) madrone fossils Type material of A. prexalapensis moved to other species
Ardisia prepaniculata[1]	Comb nov	(Berry) LaMotte	Eocene	Wilcox Formation	USA Tennessee		A marlberry species. Moved from Icacorea prepaniculata (1916)
Ardisia prisca[1]	Comb nov	(Hollick) LaMotte	Miocene	Collazo Shale	USA Puerto Rico		A marlberry species. Moved from Icacorea prisca (1924)
Asclepias fructifer[1]	Comb nov	(Cockerell) LaMotte	Eocene Priabonian	Florissant Formation	USA Colorado		A milkweed species. Moved from Acerates fructifer (1908)
Asclepias veterana[1]	Comb nov	(Heer) LaMotte	Miocene		Switzerland		A milkweed species. Moved from Acerates veterana (1859)
Asclepias wilcoxiana[1]	Comb nov	(Berry) LaMotte	Eocene	Wilcox Formation	USA Tennessee		A milkweed species. Moved from Acerates wilcoxiana (1930)
Coccoloba chapini[1]	Comb nov	(Hollick) LaMotte	Paleocene/Eocene	Matanuska coal field	USA Alaska		A Coccoloba species. Moved from Coccolobis chapini (1936)[4]
Coccoloba claibornensis[1]	Comb nov	(Berry) LaMotte	Eocene	Gosport Formation	USA Alabama		A Coccoloba species. Moved from Coccolobis claibornensis (1924)
Coccoloba columbianus[1]	Comb nov	(Berry) LaMotte	Eocene	Yegua Formation	USA Louisiana		A Coccoloba species. Moved from Coccolobis columbianus (1924)
Coccoloba eolignitica[1]	Comb nov	(Berry) LaMotte	Eocene	Lagrange Formation	USA Tennessee		A Coccoloba species. Moved from Coccolobis columbianus (1916)
Coccoloba uviferafolia[1]	Comb nov	(Berry) LaMotte	Eocene	Lagrange Formation	USA Tennessee		A Coccoloba species. Moved from Coccolobis uviferafolia (1916)
Cryptantha auriculata[1]	Comb nov	(Elias) LaMotte	Pliocene	Ogallala Formation	USA Kansas		A Cryptantha species. Moved from Krynitikia auriculata (1932)
Cryptantha chaneyi[1]	Comb nov	(Elias) LaMotte	Pliocene	Ogallala Formation	USA Kansas		A Cryptantha species. Moved from Krynitzkia (Oreocarya) chaneyi (1932)
Cryptantha coroniformis[1]	Comb nov	(Elias) LaMotte	Pliocene	Ogallala Formation	USA Kansas		A Cryptantha species. Moved from Krynitzkia (Oreocarya) coroniformis (1932)
Gonolobus (?) trinervatus[1]	Comb nov	(MacGinitie) LaMotte	Miocene	Trout Creek Flora	USA Oregon		An asclepiadoid milkweed family species Moved from Vincetoxicum (?) trinervata (1933)
Halesia inopinum[1]	Comb nov	(Hollick) LaMotte	Paleocene	Berg lake Formation	USA Alaska		A snowdrop tree species Moved from Mohrodendron inopinum (1936)[4]
Leiophyllum pleistocenicum[1]	Comb nov	(Berry) LaMotte	Pleistocene		USA North Carolina		A sandmyrtle species First described as Dendrium pleistocenicum (1907)
Viburnum comstocki[1]	Comb nov	(Sanborn) LaMotte	Eocene		USA Oregon	synonymy Aralia taurinensis (pro part of Sanborn 1935) Diospyros orientalis (1935) Viburnum variabilis (1941)	A Viburnum species First described as Mallotus comstocki (1935)

Superrosids

Name	Novelty	Status	Authors	Age	Unit	Location	Synonymized taxa	Notes	Images
Acer (Negundo) decurrens[1]	Comb nov		(Lesquereux) LaMotte	Paleocene	Denver Formation	USA Colorado		A maple. Moved from Negundo decurrens (1888)
Acer (Negundo) fremontensis[1]	Comb nov		(Berry) LaMotte	Eocene	Bridger Formation	USA Wyoming		A maple. Moved from Negundo fremontensis (1930)
Acer negundifolium[1]	Comb nov		(Dawson) LaMotte	Eocene (Ypresian)	Eocene Okanagan Highlands Stump lake	Canada British Columbia		A possible maple. Moved from Acerites negundifolium (1891)
Acer orbum[1]	Sp nom nov		LaMotte	Eocene	Ione Formation	USA California		A maple. New name for Acer aequidentatum maple fossils A. aequidentatum type fossils moved to Platanus appendiculata
Acer (Negundo) triloba[1]	Comb nov		(Newberry) LaMotte	Paleocene	Fort Union Formation	USA North Dakota		A maple. Moved from Negundo triloba (1868)
Acer tuckeri[1]	Comb nov		(Smith) LaMotte	Pliocene	"Hog Creek"	USA Idaho		A maple. Moved from Engdhardtia tuckeri (1938)
Canarium leonis[1]	Comb nov		(Cockerell) LaMotte	Eocene	Ione Formation	USA California	synonymy Juglans californica (1878) Canarium californicum (1941)	A Canarium species. Moved from Juglans leonis (1908)
Carya bartoni[1]	Comb nov		(Ball) LaMotte	Eocene		USA Texas		A hicory species. Moved from Hicoria bartoni (1931)
Carya biacuminata[1]	Comb nov		(Perkins) LaMotte	Eocene	Brandon lignites	USA Vermont		A hicory species. Moved from Hicoria biacuminata (1904)
Carya crescentia[1]	Comb nov		(Knowlton) LaMotte	Paleocene		USA Wyoming		A hickory species. Moved from Hicoria crescentia (1899)
Carya culveri[1]	Comb nov		(Knowlton) LaMotte	Paleocene		USA Wyoming		A hickory species. Moved from Hicoria culveri (1899)
Carya dawsoni[1]	Comb nov	valid	(Berry) LaMotte	Early Eocene (Ypresian)	Okanagan Highlands Chu Chua Formation	Canada British Columbia		A hickory. Moved from Hicoria dawsoni (1962)
Carya dentata[1]	Comb nov		(Knowlton) LaMotte	Paleocene		USA Wyoming		A hickory species. Moved from Hicoria culveri (1899)
Carya jacksoniana[1]	Comb nov		(Berry) LaMotte	Eocene	Yegua Formation	USA Texas	synonymy Carya olivaeformis (1859) Hicoria pecan (1915)	A hickory species. Moved from Hicoria jacksoniana (1924)
Carya juxtaporipites[1]	Comb nov		(Berry) LaMotte	Eocene Ypresian	Green River Formation	USA Colorado		A hickory species. Moved from Hicoria juxtaporipites (1933)
Carya (?) oregoniana[1]	Comb nov		(Knowlton) LaMotte	Eocene	Clarno Formation	USA Oregon		A hickory species. Moved from Hicoria (?) oregoniana (1902)
Carya orientalis[1]	Comb nov		(Chaney) LaMotte	Oligocene	Eagle Creek flora	USA Oregon		A hickory species. Moved from Hicoria orientalis (1920)
Carya pretexana[1]	Comb nov		(Berry) LaMotte	Pliocene	Citronelle Formation	USA Alabama		A hickory species. Moved from Hicoria pretexana (1916)
Carya princetoniana[1]	Comb nov		(Cockerell) LaMotte	Eocene Priabonian	Florissant Formation	USA Colorado		A hickory species. Moved from Hicoria princetoniana (1908)
Carya rostrataformis[1]	Comb nov		(Berry) LaMotte	Eocene	Lagrange Formation	USA Tennessee		A hickory species. Moved from Hicoria rostrataformis (1924)
Carya stanleyanum[1]	Comb nov	valid	(Dawson) LaMotte	Early Eocene (Ypresian)	Huntingdon Formation	Canada British Columbia		A hickory. Moved from Hicoria dawsoni (1962) First named Dryophyllum stanleyanum (1895)
Carya williamsi[1]	Comb nov		(Chaney) LaMotte	Oligocene	Eagle Creek flora	USA Oregon		A hickory species. Moved from Hicoria williamsi (1920)
Celtis americana[1]	Comb nov		(Berry) LaMotte	Eocene	McBean Formation	USA Georgia	Mimosa americana (1919)	A Celtis species. Moved from Momisia americana (1914)
Cercidiphyllum piperoides[1]	Comb nov		(Lesquereux) LaMotte	Eocene	Ione Formation	USA California	synonymy Ceanothus idahoensis (1935) Cercidiphyllum elongatum (1939) Populus smilacifolia (1920) Populus zaddachi (1878) Trochodendroides zaddacki (1935) Zizyphus californica (1919) Zizyphus microphyUus (Lesquereux) (1878)	A katsura species. Moved from Zizyphus piperoides (1878) Moved to Tetracentron piperoides in 1977[3]	Tetracentron piperoides
Comptonia parvula[1]	Comb nov		(Heer) LaMotte	Cretaceous	Patoot beds	Denmark Greenland	synonymy Myrica (Comptonia) parvifolia (1883) Comptonia microphylla (1906)	A Comptonia species. Moved from Myrica (Comptonia) parvula (1916)
Cupanites berryi[1]	Sp nom nov		LaMotte	Eocene	Barnwell Formation	USA Georgia		A sapindaceous Cupanites species. A new name for Cupanites nigricans (1918)
Inga alia[1]	Sp nom nov		LaMotte	Miocene		Cuba		An ice-cream-bean species A new species name for Inga miocenica (Berry, 1939) (1939)
Liquidambar dubia[1]	Sp nom nov		(Berry) LaMotte	Eocene	Lagrange Formation	USA Kentucky		A sweetgum species A replacement name for Liquidambar incerta (Berry, 1924) (1924)
Macrolobium geminifolia	Comb nov		(MacGinitie) LaMotte	Eocene	Ione Formation	USA California		A Macrolobium species legume. Moved from Vouapa geminifolia (1941)
Melastomites incertus[1]	Sp nom nov		LaMotte	Oligocene	Culebra Formation	Panama		A melastome species A replacement name for Melastomites miconioides (Berry, 1919) (1919)
Populus americana[1]	Comb nov		(Lesquereux) LaMotte	Eocene Priabonian	Florissant Formation	USA Colorado	synonymy Populus heerii (of Lesquereux 1883) Populus lesquereuxi (1906)	A cottonwood species. Moved from Pterocarya americana (1874)
Populus (?) paramonodon[1]	Sp nom nov		LaMotte	Paleocene		USA New Mexico		A possible cottonwood species New name for referred "Populus monodon" fossils P. monodon type specimens moved to Ficus monodon
Prunus gracilis (Lesquereux)[1]	Comb nov	Jr homonym	(Lesquereux) LaMotte	Eocene Pribonian	Florissant Formation	USA Colorado	Quercus neriifolia (of Lesquereux, 1883	A possible cherry species Moved from Amygdalus gracilis (1883) Jr homonym of Prunus gracilis (Engelm. & A.Gray)
Prunus wilcoxiana[1]	Comb nov		(Berry) LaMotte	Eocene	Tallahatta Formation Holly Springs Sand Member	USA Tennessee		A possible cherry species Moved from Amygdalus wilcoxiana (1930)
Pyrus alvordensis[1]	Comb nov		(MacGinitie) LaMotte		Trout Creek flora	USA Oregon		A possible mountain ash species Moved from Sorbus alvordensis (1933)
Pyrus coronariafolia[1]	Comb nov		(Berry) LaMotte	Pleistocene		USA North Carolina		A possible apple species Moved from Malus coronariafolia (1907)
Pyrus decorafolia[1]	Comb nov		(Berry) LaMotte	Eocene (Ypresian)	Okanagan Highlands Chu Chua Formation	Canada British Columbia		A possible mountain ash species Moved from Sorbus decorafolia (1926)
Pyrus diversifolia (Lesquereux)[1]	Comb nov	Jr homonym	(Lesquereux) LaMotte	Eocene (Priabonian)	Florissant Formation	USA Colorado	synonymy Crataegus acerifolia (Lesquereux) (1883) Crataegus lesquereuxi (1906) Onoclea reducta (1908)	A possible mountain ash species Moved from Sorbus diversifolia (1918) First named Myrica diversifolia (1883) homonym of Pyrus diversifolia Bong.
Pyrus grandifolia[1]	Comb nov		(Heer) LaMotte	Paleocene		Denmark Greenland		A possible mountain ash species Moved from Sorbus grandifolia (1869)
Pyrus harneyensis[1]	Comb nov		(Axelrod) LaMotte	Pliocene		USA Oregon		A possible mountain ash species Moved from Sorbus harneyensis (1944)
Pyrus idahoensis[1]	Comb nov		(Brown) LaMotte	Oligocene	Salmon flora	USA Idaho		A possible apple species Moved from Malus idahoensis (1935)
Pyrus megaphylla[1]	Comb nov		(Cockerell) LaMotte	Eocene Priabonian	Florissant Formation	USA Colorado		A possible mountain ash species Moved from Sorbus megaphylla (1908)
Pyrus nupta[1]	Comb nov		(Cockerell) LaMotte	Eocene Priabonian	Florissant Formation	USA Colorado	Myrica diversifolia (1883) pro part	A possible mountain ash species Moved from Sorbus nupta (1910)
Pyrus pseudoangustifolla[1]	Comb nov		(Berry) LaMotte	Pliestocene		USA North Carolina		A possible apple species Moved from Malus pseudoangustifolla (1910)
Shepherdia weaveri[1]	Comb nov		(Hollick) LaMotte	Paleocene - Eocene	"Kachemak Bay flora"	USA Alaska		A possible buffaloberry species Moved from Lepargyraea weaveri (1936)[4]
Sphaeralcea (?) exhumatum[1]	Comb nov		(Cockerell) LaMotte	Eocene Priabonian	Florissant Formation	USA Colorado		A possible globemallow species Moved from Malvastrum (?) exhumatum (1906)
Ulmus chuchuanus[1]	Sp nom nov	valid	(Berry) LaMotte	Eocene (Ypresian)	Okanagan Highlands Chu Chua Formation	Canada British Columbia		An elm. New name for "Ulmus columbianus" Berry (1926) Junior homonym of "Ulmus columbiana" Penhallow (1907)	Ulmus chuchuanus
Xanthoxylum alia[1]	Sp nom nov		LaMotte	Miocene		Cuba		A possible Zanthoxylum species New name for Fagara miocenica Berry, 1939) (1939) F. miocenica a jr homonym of Fagara miocenica (Berry, 1925)
Xanthoxylum apalachacolensis[1]	Comb nov		(Berry) LaMotte	Miocene	Alum Bluff Formation	USA Florida		A possible Zanthoxylum species Moved from Fagara apalachacolensis (1916)
Xanthoxylum catahoulensis[1]	Comb nov		(Berry) LaMotte	Eocene	Catahoula Formation	USA Louisiana		A possible Zanthoxylum species Moved from Fagara catahoulensis (1916) 4 varieties also moved F. c. corlacea, F. c. elongata, F. c. major, & F. c. orbiculata
Xanthoxyium claibornensis[1]	Comb nov		(Berry) LaMotte	Eocene	Mount Selman Formation	USA Texas		A possible Zanthoxylum species Moved from Fagara claibornensis (1924)
Xanthoxyium (?) delicatula[1]	Comb nov		(Cockerell) LaMotte	Eocene Priabonian	Florissant Formation	USA Colorado		A possible Zanthoxylum species Moved from Fagara (?) delicatula (1908)
Xanthoxylum dubium[1]	Comb nov	nomen nudum	(Lesquereux) LaMotte	Paleocene	Raton Formation	USA New Mexico		A possible Zanthoxylum species Moved from Zanthoxylum dubium (1872) Considered nomen nudum by LaMotte
Xanthoxylum eocenica[1]	Comb nov		(Berry) LaMotte	Eocene	Lagrange Formation	USA Tennessee		A possible Zanthoxylum species Moved from Fagara eocenica (1916)
Xanthoxylum juglandianum[1]	Comb nov		(Braun) LaMotte	"Tertiary"		Europe		A possible Zanthoxylum species Moved from Zanthoxylum juglandianum (1878)
Xanthoxylum miocenica[1]	Comb nov		(Berry) LaMotte	Miocene	Forest Sand Formation	Trinidad		A possible Zanthoxylum species Moved from Fagara miocenica (1925)
Xanthroxylum petraflumensis[1]	Comb nov		(Berry) LaMotte	Eocene	Yegua Formation	USA Texas		A possible Zanthoxylum species Moved from Fagara petraflumensis (1924)
Xanthoxylum puryearensis[1]	Comb nov		(Berry) LaMotte	Eocene	Lagrange Formation	USA Tennessee		A possible Zanthoxylum species Moved from Fagara eocenica (1916)
Xanthoxyium spireaefolia[1]	Comb nov		(Lesquereux) LaMotte	Eocene Priabonian	Florissant Formation	USA Colorado		A possible Zanthoxylum species Moved from Fagara spireaefolia (1908) First named Zanthoxylum spireaefolium (1883)
Xanthoxylum wadii[1]	Comb nov		(Berry) LaMotte	Miocene		Mexico Oaxaca		A possible Zanthoxylum species Moved from Fagara wadii (1923)
Xanthoxylum wyomingensis[1]	Comb nov		(Berry) LaMotte	Eocene	Bridger Formation	USA Wyoming		A possible Zanthoxylum species Moved from Fagara wyomingensis (1930)

Other angiosperms

Name	Novelty	Status	Authors	Age	Unit	Location	Synonymized taxa	Notes	Images
Carpites interglacialis[1]	Comb nov		(Hollick) LaMotte	Miocene	St. Eugene Silts	Canada British Columbia	synonymy Carpites menthoides (1926) Carpolithes sp. (1937) Equisetum sp. (underground stem) (1926) Malva (?) hesperia (1928) Phyllites amplexicaulis (1926)	A fruit/seed species of uncertain affinity. Moved from Ficus interglacalis (1928)

General research

Robert LaMotte publishes the Catalogue of the Cenozoic plants of North America through 1950, with numerous nomenclatural updates and corrections.[1]

References

LaMotte, R.S. (1952). Catalogue of the Cenozoic plants of North America through 1950. Geological Society of America Memoirs. Vol. 51. Geological Society of America. doi:10.1130/MEM51.
Miller, N. G. (1980). "Fossil mosses of North America and their significance". The Mosses of North America. pp. 9–36.
Wolfe, J.A. (1977). Paleogene floras from the Gulf of Alaska region (Report). Professional Paper. Vol. 997. United States Geological Survey. pp. 1–108. doi:10.3133/pp997.
Hollick, A.; Smith, P. (1936). The Tertiary floras of Alaska, with a chapter on the geology of the Tertiary deposits (Report). Professional Paper. United States Geological Survey. pp. 1–185. doi:10.3133/pp182. 182.

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[LaMotte52-1] LaMotte, R.S. (1952). Catalogue of the Cenozoic plants of North America through 1950. Geological Society of America Memoirs. Vol. 51. Geological Society of America. doi:10.1130/MEM51.

[Miller1980-2] Miller, N. G. (1980). "Fossil mosses of North America and their significance". The Mosses of North America. pp. 9–36.

[Wolfe1977-3] Wolfe, J.A. (1977). Paleogene floras from the Gulf of Alaska region (Report). Professional Paper. Vol. 997. United States Geological Survey. pp. 1–108. doi:10.3133/pp997.

[Hollick1936-4] Hollick, A.; Smith, P. (1936). The Tertiary floras of Alaska, with a chapter on the geology of the Tertiary deposits (Report). Professional Paper. United States Geological Survey. pp. 1–185. doi:10.3133/pp182. 182.