Crassothonna clavifolia
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Crassothonna
Species:
C. clavifolia
Binomial name
Crassothonna clavifolia
(Marloth) B.Nord.

Crassothonna clavifolia (previously Othonna clavifolia) is a species of flowering plant in the family Asteraceae. It is found only in Namibia. Its natural habitat is rocky areas. It is threatened by habitat loss.

Description

This species is a low-growing succulent with grey, trailing branches and squat, cylindrical or barrel-like leaves.[2] The yellow, daisy-like flowers grow on long stalks.[2] The specific epithet, clavifolia, is from the Latin words clava meaning a club and folia meaning leaves, referring to the club-shape of the leaves.

Taxonomy

This species was described by Hermann Wilhelm Rudolf Marloth in 1910[3] as Othonna clavifolia, however, the genus was changed from Othonna by Nordenstam et al., who erected the new genus Crassothonna for a distinct clade of Othonna species.[4] The new name for this species is therefore Crassothonna clavifolia (Marloth) B.Nord.

Distribution and habitat

This species is found from the northwest of the Richtersveld where the sandveld meets the Gariep River towards the southern Namibian coast.[2] This succulent is found in sandy deserts sometimes growing among rocks.[2]

Threats and cultivation

The species was classified in 2004 by the IUCN as Least Concern,[1] although recent concern has been expressed about commercial looting of this plant as part of the succulent plant market.[5][6]

References

  1. 1 2 Craven, P. (2004-04-30). "Crassothonna clavifolia". IUCN Red List of Threatened Species. Retrieved 2023-04-01.
  2. 1 2 3 4 Latti, Ivan. "Crassothonna clavifolia". Operation Wildflower. Retrieved 2021-04-30.
  3. ↑ Marloth, R. (January 1910). "SOME NEW SOUTH AFRICAN SUCCULENTS. Part III". Transactions of the Royal Society of South Africa. 2 (1): 33–39. doi:10.1080/00359191009519359. ISSN 0035-919X.
  4. ↑ Nordenstam, Bertil (2012). "Crassothonna B. Nord., a new African genus of succulent Compositae-Senecioneae". Compositae Newsletter. 50: 70–77.
  5. ↑ Frandsen, Robin (2017). Succulents of Southern Africa. Johannesburg, South Africa: Honeyguide Publications. ISBN 9780620749558.
  6. ↑ Grenier, Florent (2019). Secrets of Namaqualand Succulents. self-published. ISBN 9791069933095.
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