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Published In: Species Plantarum 2: 723. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
General/Distribution: Verdcourt (l.c.) has recently redefined the generic limits of the genus Phaseolus. In this revised and restricted sense the genus contains c.50 species, predominantly American.

 

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Herbs or subshrubs, erect, prostrate or climbing. Leaves stipulate, stipules persistent, not prolonged below the point of insertion; pinnately trifoliolate, rarely unifoliolate. Inflorescence axillary, falsely racemose, the flowers in fascicles along the rachis; bracts and bracteoles present. Calyx 5-lobed, 2-lipped; upper lip emarginate, bifid, lower lip 3-lobed. Vexillum round, auriculate, with 2 appendages or with only slight appendages at the side of the claw and a transverse constriction above or with none; wings often following the spiral of the keel; keel often narrow, elongated, the apex beaked and forming the spiral of 1-5 complete turns. Stamens diadelphous, 9+1; anthers subuliform or 5 dorsifixed alternating with 5 basifixed. Ovary 2-many ovuled; style tenuous below, the upper part artilaginous and thickened, curved through 360º, the upper portion glabrous or hairy inside; stigma oblique on the inner side of the style apex or sometimes terminal and subterminal, not penicillate. Pod linear or oblong, compressed or subcylindrical, sometimes beaked. Seeds 3-many, oblong or reniform.
 

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1 Pod narrow, mostly 5-15-seeded (2)
+ Pod oblong-falcate, 3-4-seeded; flowers mostly whitish; bracteoles small Phaseolus lunatus
2 (1) Flowers bright scarlet or white, often numerous, mostly c. 1.8-2.5 cm long Phaseolus coccineus
+ Flowers white, yellowish, pink or violet-purple, mostly few, 1-19 cm long; bracteoles conspicuous Phaseolus vulgaris
 
 
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