Cyperus tonkinensis C.B.Clarke var. baikiei (C.B.Clarke ex Kuek ) S.S.Hooper, Kew Bull. 26 (3): 577 (1972)

Kuetegue, Felix, Sonke, Bonaventure & Ameka, Gabriel K., 2019, A checklist of rheophytes of Cameroon, PhytoKeys 121, pp. 81-131 : 81

publication ID

https://dx.doi.org/10.3897/phytokeys.121.29924

persistent identifier

https://treatment.plazi.org/id/129EE591-504E-719C-3CEF-B8FC0ADF9797

treatment provided by

PhytoKeys by Pensoft

scientific name

Cyperus tonkinensis C.B.Clarke var. baikiei (C.B.Clarke ex Kuek ) S.S.Hooper, Kew Bull. 26 (3): 577 (1972)
status

 

Cyperus tonkinensis C.B.Clarke var. baikiei (C.B.Clarke ex Kuek) S.S.Hooper, Kew Bull. 26 (3): 577 (1972) View in CoL

Cyperus baikiei C.B.Clarke, Consp. Fl. Afr. [T.A. Durand & H. Schinz] 5: 550 (1894)

Cyperus kottensis Chem. Arch. Bot., Caen iv. Mem. No. 7, 23 (1931)

Type.

Vietnam, Tonkin, Tu-Phap, 12 Apr 1888, Balansa 2831 (K).

Description.

Herb, about 12 cm high, with hard tubers, connected by dark brown rhizome; stems dark brown and shiny; inflorescence spikelets, glumes brown.

Specimens examined.

62 km southeast of Bafia, on Sanaga River, 4°75'N, 11°22'E, 27 Mar 1963, J. & A. Raynal 10538 (YA); Sanaga River, bridge near Nkong Njok, 4°10'N, 11°01'E, 12 Mar 1978, J. Lowe 3483 (YA); Bongossi Research Plot of the National Herbarium of Cameroon, bank of Sanaga River, 4°22'N, 11°16'E, 29 Mar 1987, L. Ake Asse 1859 (YA); near Nguti, Mbombe on Loa River, 29 May 2011, F. Kuetegue, 498 (YA).

Habitat.

Sandy bars or beds of streams and rivers.

Distribution.

Benin, Cameroon (Fig. 10 View Figures 2–10 ), Central African Republic, Chad, Congo, Ghana, Guinea, Liberia, Mali, Nigeria, Senegal, and Sierra Leone.

Conservation status in Cameroon.

Cyperus tonkinensis var. baikiei is not listed on http://www.iucnredlist.org nor assessed by Onana and Cheek (2011). The taxon is currently known from five localities. The extent of occurrence of this species is about 800 km2 and the area of occupancy is about 20 km2. Construction of a hydropower dam on the Sanaga River from which the species was collected is in progress. Based on this threat and the fact that the species is only currently known from five localities, C. tonkinensis var. baikiei is here assessed as Endangered. IUCN Red List Category: Endangered ENB1+2ab (ii, iii).

Kingdom

Plantae

Phylum

Tracheophyta

Class

Liliopsida

Order

Poales

Family

Cyperaceae

Genus

Cyperus

Loc

Cyperus tonkinensis C.B.Clarke var. baikiei (C.B.Clarke ex Kuek ) S.S.Hooper, Kew Bull. 26 (3): 577 (1972)

Kuetegue, Felix, Sonke, Bonaventure & Ameka, Gabriel K. 2019
2019
Loc

Cyperus kottensis

Cherm 1931
1931