New taxa of Chlorophytum (Anthericaceae) from southern tropical Africa with notes on their sister group relationships

作者：Bjora Charlotte S^*; Hoell Gry; Kativu Shakkie; Nordal Inger

来源：Botanical Journal of the Linnean Society, 2008, 157(2): 223-238.

DOI：10.1111/j.1095-8339.2008.00811.x

• Malawi
• new species
• phylogeny
• species delimitation
• Zambia

Six new taxa of Chlorophytum (five from Zambia and one from Malawi) are described, namely C. bulbinifolium Hoell & Nordal, C. zambiense Bjora & Nordal, C. chelindaensis Kativu & Nordal, C. clarae Bjora & Nordal, C. blepharophyllum Schweinf. ex Baker ssp. rubropygmaeum Bjora & Nordal, and C. blepharophyllum Schweinf. ex Baker ssp. pendulum Hoell & Nordal. The sister group relationships of the new taxa were studied by cladistic analyses of nuclear and chloroplast DNA sequences. Chlorophytum bulbinifolium has an isolated position in the cladogram. It is morphologically closest to C. subpetiolatum (Baker) Kativu, but differs by its narrow succulent leaves and smaller flowers. Chlorophytum zambiense is nested with C. andongense Baker, C. macrosporum Baker, and C. viridescens Engl., but differs by being more slender and by having ebracteate peduncles and smaller flowers. Chlorophytum chelindaensis belongs in the C. colubrinum Engl. complex, differing from C. colubrinum by its small habit and hairy leaves. Chlorophytum clarae is in a clade with C. pusillum Schweinf. ex Baker and C. pauper Poelln. It is morphologically closest to C. macrophyllum Asch., but has globose capsules and smaller irregularly folded seeds.

• 出版日期2008-6