Abstract
A taxonomic account of six species of Ziziphus Mill., viz. Z. funiculosa Buch.-Ham. ex Lowson, Z. glabrata Heyne ex Roth, Z. mauritiana Lam., Z. oenoplia (L.) Mill., Z. rugosa Lam., and Z. xylopyrus (Retz.) Willd. occurring in the flora of Bangladesh has been given. A dichotomous key to the species has been furnished. An updated nomenclature including important synonyms, selected references, description of the taxa along with illustrations, ecological notes, specimens examined and geographical distribution have been provided. Bangla and English names, flowering and fruiting periods, chromosome number and economic importance have also been presented where available.Keywords: Ziziphus; Taxonomy; BangladeshDOI: 10.3329/bjpt.v15i1.917Bangladesh J. Plant Taxon. 15(1): 47-61, 2008 (June)
Highlights
The genus Ziziphus Mill., belonging to the family Rhamnaceae, is characterized for its 3 or 5-nerved leaves and drupaceous fruits with a solitary pyrene. It consists of about 135 species, distributed in the temperate and tropical parts of the world, mostly concentrated in Asia and America; a few of them extend in the Pacific Islands and Australia (Bhandari and Bhansali 2000)
There has been no systematic study of the genus Ziziphus in Bangladesh
Rashid et al (2000), Khan and Huq (2001), and Rahman (2004a, b) and the study of the herbarium materials at different herbaria revealed that only six species have so far been reported from Bangladesh
Summary
The genus Ziziphus Mill., belonging to the family Rhamnaceae, is characterized for its 3 or 5-nerved leaves and drupaceous fruits with a solitary pyrene. The present work is mainly based on the herbarium specimens housed at Bangladesh National Herbarium (DACB), Central National Herbarium (CAL), and Dhaka University Herbarium indicated in the text as DUH as well as on the survey of literature, namely Farr et al (1979), Hara and Williams (1979), Qaiser and Nazimuddin (1981), Bhandari and Bhansali (1990, 2000) and Long and Rae (1991). Leaves 1.8-10.3 × 1.3-5.2 cm, alternate, lanceolate or ovate-oblong, apex acute, base rounded, crenulate, glabrous, coriaceous, glossy, dark green, basally 3-nerved; petioles 3-9 mm long; stipules filiform, deciduous.
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