Tylecodon wallichii

Tylecodon wallichii
	Tylecodon wallichii in Montagu.
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Saxifragales
Family:	Crassulaceae
Genus:	Tylecodon
Species:	T. wallichii
Binomial name
	Tylecodon wallichii; (Harv.) Toelken
Synonyms
	Cotyledon wallichii Harv.;

Tylecodon wallichii is a species of succulent plant in the genus Tylecodon belonging to the family Crassulaceae.[1] The species is named in honour of Nathaniel Wallich, early 19th century Danish plant hunter, botanist and physician.

Description

Detail of Tylecodon wallichii flowers. Anysberg Nature Reserve.

Tylecodon wallichii in winter. Richtersveld National Park

Tylecodon wallichii is a low sparsely branched shrublets reaching a height of about 50 cm (up to 1 m) with a single thick succulent stem up to 6 cm in diameter. Greyish branches are densely covered with residual leaf bases (phyllopodia) up to 1.5 cm long and crowded leaves on their tips. Leaves are yellowish to ash-green, hairless, ascending, slightly curved inward, tapering towards the apex, with a shallow groove along upper side, 6.5 — 9.5 cm (up to 15 cm) long. Plants blossom during summer, producing spreading to pendent clusters of dangling yellowish-green, urn-shaped flowers of 7-12 mm long with spreading to recurved lobes.[2][3]

Hybridises with Tylecodon paniculatus.[4]

Distribution

Gravelly or sandy slopes of South Namibia and RCA from Namaqualand into the Great and Little Karoo.[1]

Toxicity

The plant contains bufadienolide-type cardiac glycoside cotyledoside which causes nenta poisoning ("krimpsiekte") in livestock.[5]

Subspecies

Tylecodon wallichii subsp. wallichii — South Namibia, RCA (Northern Cape)
Tylecodon wallichii subsp. ecklonianus (Harv.) Toelken — South Namibia, RCA (Northern and Western Cape)

References

"Tylecodon wallichii (Harv.) Toelken". Plants of the World Online. Royal Botanic Gardens Kew. Retrieved 21 January 2022.
Eggli, Urs (2003). Illustrated Handbook of Succulent Plants: Crassulaceae. Berlin, Heidelberg: Springer Berlin Heidelberg. p. 364. ISBN 978-3-642-55874-0.
F. Smith, Gideon; R Crouch, Neil; Figueiredo, Estrela (2017). Field Guide to Succulents of Southern Africa. Penguin Random House South Africa. p. 320. ISBN 9781775843672.
Manning, John C.. (2013). Field guide to wild flowers of South Africa. Cape Town: Random House Struik. p. 236. ISBN 9781920544874.
Kellerman, T. S.; Coetzer, J. A. W.; Naudé, T. W.; Botha, C. J. (2005). Plant poisonings and mycotoxicoses of livestock in southern Africa (2nd ed.). Oxford: Oxford University Press. pp. 116–146. ISBN 978-0195761344.

External links

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[kew-1] "Tylecodon wallichii (Harv.) Toelken". Plants of the World Online. Royal Botanic Gardens Kew. Retrieved 21 January 2022.

[2] Eggli, Urs (2003). Illustrated Handbook of Succulent Plants: Crassulaceae. Berlin, Heidelberg: Springer Berlin Heidelberg. p. 364. ISBN 978-3-642-55874-0.

[3] F. Smith, Gideon; R Crouch, Neil; Figueiredo, Estrela (2017). Field Guide to Succulents of Southern Africa. Penguin Random House South Africa. p. 320. ISBN 9781775843672.

[4] Manning, John C.. (2013). Field guide to wild flowers of South Africa. Cape Town: Random House Struik. p. 236. ISBN 9781920544874.

[5] Kellerman, T. S.; Coetzer, J. A. W.; Naudé, T. W.; Botha, C. J. (2005). Plant poisonings and mycotoxicoses of livestock in southern Africa (2nd ed.). Oxford: Oxford University Press. pp. 116–146. ISBN 978-0195761344.