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This species is accepted, and its native range is Cameroon.

[KBu]

Simpson, D., Lye, K., & Cheek, M. (2004). Hypolytrum pseudomapanioides (Cyperaceae), a New Species from Cameroon. Kew Bulletin, 59(4), 613-615. doi:10.2307/4110921

Conservation
Known from only two specimens in an area which is or is likely to be experiencing a decline in habitat quality due to forest clearance. We assess the taxon as Endangered (EN) using the criteria set out by IUCN (2001): ENB2ab(iii).
Distribution
Endemic to south-western Cameroon.
Ecology
Montane forest; 1470 - 1500 m.
Morphology Culms
Culm 1, erect, central, 60 - 70 cm x 2 - 3 mm, trigonous, ± smooth, green
Morphology General Habit
Robust, tussocky perennial; rhizome branching, short, erect, 2 - 4 mm diam. Culm 1, erect, central, 60 - 70 cm x 2 - 3 mm, trigonous, ± smooth, green
Morphology Leaves
Leaves mostly basal, many, cauline leaf 1; leaf-blade up to 100 x 1.3 - 1.6 cm, apex gradually narrowed, base gradually narrowed into sheath, coriaceous, green, flat in cross-section, margins prominently serrate, midrib most prominent and raised on upper side, the 2 major lateral nerves most prominent on the lower side, minor lateral nerves numerous, rather indistinct; basal sheaths with well developed brown membranous margins
Morphology Reproductive morphology Fruits
Nutlet c. 2 x 1.3 - 1.5 mm, obovate, lenticular, grey with prominent unbranched longitudinal ridges of very unequal length.
Morphology Reproductive morphology Inflorescences
Inflorescence an irregular subspherical brownish-white head, 2.5 - 3.5 x 3 - 3.5 cm, comprising numerous, crowded, fairly distinct spikes Spikes ovoid to lanceolate, 10 - 14 x 3 - 5 mm, pale brown
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts usually 4, foliaceous, very unequal, the lowest up to 50 x 1.6 cm Floral bracts 2, ovate-lanceolate, up to 5 x 1 mm, prominently boat-shaped, acuminate, light brown to pallid, keel strongly toothed; stamens not seen; stigma branches 2; style c. 3 mm long Spicoid bracts ovate, 5 - 6 x 1 mm, light reddish- brown
Note
Hypolytrum pseudomapanioides has a central, terminal flowering culm and basal rosette of leaves arising from a branch of the rhizome. It also has a congested subspherical pale inflorescence with foliaceous involucral bracts. It appears superficially similar to H. subcompositus Lye & D. A. Simpson, also newly described from this region (Lye & Simpson in press). However, that species differs in having several culms per plant arising from the lower leaf axils rather than a single terminal culm. In general appearance Hyploytrum pseudomapanoides is similar to many African Mapania species. However, the presence of two floral bracts and two stigma branches identifies it as Hypolytrum, Mapania having 4 - 6 floral bracts and three stigma branches (Simpson 1992). Recent molecular studies (Simpson et al. 2003) have cast doubt on the separation of these two genera and further, more detailed work may eventually support their amalgamation into a single genus.
Type
Cameroon, South West Province, Kupe-Muanenguba division, Bakossi Mts, Kodmin, 0.5 km on road to Ndip, 4°60'N 9°42'E, 18 Jan. 1998, Cheek 8919 (holotypus K!; isotypus YA).
Vegetative Multiplication Rhizomes
Rhizome branching, short, erect, 2 - 4 mm diam.

Native to:

Cameroon

Hypolytrum pseudomapanioides D.A.Simpson & Lye appears in other Kew resources:

Date Reference Identified As Barcode Type Status
May 1, 2001 Ghogue, J.-P. [33], Cameroon K000050873
May 1, 2001 Cheek, M. [8919], Cameroon K000050874

First published in Kew Bull. 59: 613 (2004)

Accepted by

  • Govaerts, R. & Simpson, D.A. (2007). World Checklist of Cyperaceae. Sedges: 1-765. The Board of Trustees of the Royal Botanic Gardens, Kew.

Literature

Kew Bulletin

  • ---, Furness, C. A., Hodkinson, T., Muasya, A. M. & Chase, M. W. (2003). Phylogenetic relationships in Cyperaceae subfamily Mapanioideae inferred from pollen and plastid DNA sequence data. Amer. J. Bot. 90: 1071 - 1087.
  • IUCN (2001). IUCN Red List Categories: Version 3.1. IUCN Species Survival Commission, Cland, Switzerland and Cambridge, U.K.
  • Lye, K. A. & Simpson, D. A. (2005, in press). Studies in African Cyperaceae 30. Hypolytrum subcompositus Lye & D. A. Simpson sp. nov. Nordic J. Bot. 23(4).
  • Simpson, D. A. (1992). A revision of the genus Mapania (Cyperaceae). Pp. 1 - 189. Royal Botanic Gardens, Kew.

Herbarium Catalogue Specimens

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Bulletin
Kew Bulletin
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0