Chrysogonum

Chrysogonum is a genus of flowering plants in the family Asteraceae found only in eastern North America. Confusion regarding species that were named in Chrysogonum from other parts of the world, such as Madagascar, was clarified by Stuessy [2] who reduced the genus to having only a single species with two varieties. A similar treatment was proposed by Nesom,[3] although in that treatment 3 varieties were accepted.[4] The plants are low-growing terrestrial herbs with yellow flower heads containing both disc florets and ray florets. The genus is distinctive in having pistillate ray florets and staminate disk florets, and the pistil of the ray floret is fused to the adjacent phyllary as well as 3 paleae and their associated disk florets to form a "cypsela complex". The species is grown as an ornamental plant under the common name of Green and Gold, and is used primarily as a ground cover.[5][6][7][8][9]

Species

Chrysogonum
Chrysogonum virginianum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Tribe: Heliantheae
Subtribe: Engelmanniinae
Genus: Chrysogonum
L.
Type species
Chrysogonum virginianum
Synonyms[1]
  • Cargilla Adans.
  • Diotostephus Cass.

References
  1. Flann, C (ed) 2009+ Global Compositae Checklist Archived 2014-11-14 at archive.today
  2. Stuessy, T. F. 1977. Revision of Chrysogonum (Compositae, Heliantheae). Rhodora 79: 190–202.
  3. Nesom, G. L. 2001. Taxonomic review of Chrysogonum (Asteraceae: Heliantheae). Sida 19: 811–820.
  4. Nowicki, Marcin; Schilling, Edward E.; Boggess, Sarah L.; Houston, Logan C.; Huff, Matthew L.; Staton, Margaret E.; Lampley, Jayne A.; Trigiano, Robert N. (February 2019). "Development and Characterization of Genic Microsatellites for the Ornamental Plant Green and Gold (Chrysogonum virginianum)". HortScience. 54 (2): 395–400. doi:10.21273/HORTSCI13739-18. ISSN 0018-5345.
  5. Linnaeus, Carl von. 1753. Species Plantarum 2: 920-921 in Latin
  6. Tropicos, Chrysogonum L.
  7. Flora of North America, Chrysogonum Linnaeus, Sp. Pl. 2: 920. 1753; Gen. Pl. ed. 5, 391. 1754.
  8. Nesom, G. L. 2001. Taxonomic review of Chrysogonum (Asteraceae: Heliantheae). Sida 19: 811–820.
  9. Stuessy, T. F. 1977. Revision of Chrysogonum (Compositae, Heliantheae). Rhodora 79: 190–202.


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