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Taxonomic Revision of the Genus Crinum L. (liliaceae) of Bangladesh

Sumona Afroz
Department of Botany, University of Dhaka, Dhaka 1000, Bangladesh

M. Oliur Rahman
Department of Botany, University of Dhaka, Dhaka 1000, Bangladesh

Md. Abul Hassan
Department of Botany, University of Dhaka, Dhaka 1000, Bangladesh

Abstract/ Executive Summary:

The genus Crinum L. represented by eight species in Bangladesh is revised. The species occurring in Bangladesh are Crinum amabile Donn, C. amoenum Roxb., C. asiaticum L., C. defixum Ker-Gawl., C. jagus (Thomps.) Dandy, C. latifolium L., C. pratense Herb. and C. stenophyllum Baker. Each species is described with updated nomenclature, important synonyms, English and Bangla names, phenology, specimens examined, chromosome number, habitat, distribution, economic value and mode of propagation. A dichotomous bracketed key to the species and illustrations are also provided.

Keywords: Crinum L., Taxonomy; Revision, Amaryllidaceae, Bangladesh

Location: Different of the country, Bangladesh

Start Date:

End Date:

Program Area: Conservation and Biodiversity

Commodity: Plant(s)

Objectives:

To revise the genus Crinum L. in Bangladesh.

Methodology:

Plant samples of different Crinum L. species were collected from different parts of the country and planted in the Dhaka University Botanical Garden for further study. The collected plant specimens were critically studied and examined which were supplemented by the herbarium specimens housed at the Dhaka University Salarkhan Herbarium (DUSH) and Bangladesh National Herbarium (DACB). Identification of the Crinum species were confirmed in consultation with standard literature (Hooker, 1892; Karthikeyan et al., 1989; Raven and Zhengyi, 2000; Utech, 2002; Hassan, 2007) and matching with authentically identified herbarium specimens deposited in DUSH and DACB. Updated nomenclature is determined consulting The Plant List (2013), a working list of all plant species. Each species is described with updated nomenclature, important synonyms, English and Bangla names, flowering and fruiting period, specimens examined, chromosome number, habitat, distribution, economic value, and mode of propagation. A dichotomous bracketed key to the species and illustrations are also provided. The voucher specimens are deposited at DUSH.

Source of Information: Bangladesh J. Plant Taxon. 25(2): 257–271, 2018 (December)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Perennial herbs with tunicated bulbs, usually produced at the apex into a short or long false stem. Leaves long, lorate or ensiform, spirally arranged, sessile, with smooth or scabrous edges. Peduncle compressed, solid. Flowers large, fragrant, umbellate, short-pedicelled or sessile, spathes 2, lanceolate, scarious; bracteoles many, linear. Perianth funnel-shaped or almost salver-shaped, tube long, straight or incurved, perianth segments 6, linear-lanceolate or narrowly oblong, red to white, often striped, streaked, or overlaid with red abaxially. Stamens 6, adnate to the throat of the perianth tube; filaments free, filiform, declinate or diverging; anthers linear or oblong-linear, dorsifixed. Carpels 3, syncarpous. Ovary inferior, 3-celled, ovules few in each locule, biseriate; style long, filiform, more or less declinate; stigma small, sub-capitate. Fruit a capsule, sub-globose or obovoid, membranous or coriaceous, bursting irregularly. Seeds few, large, green, rounded or irregularly compressed.

Knowledge Management: Journal