|
(Last Modified On 9/30/2013)
|
|
|
|
(Last Modified On 9/30/2013)
|
|
Genus
|
PHASEOLUS L.
|
|
Contributor
|
James A. Lackey & W. G. D'Arcy
|
|
PlaceOfPublication
|
Sp. P1. 723. 1753
|
|
Note
|
TYPE: P. vulgaris L.
|
|
Description
|
Vines, herbs or subshrubs. Leaves pinnate trifoliolate, the leaflets mostly entire, pubescent or glabrate but minute, uncinate hairs present, the stipels often oblong, thin, glabrous; stipules acute, nervate, often pubescent, not prolonged below the insertion. Inflorescences axillary, the flowers congested in fascicles along the rachis, the nodes not swollen, not glandular, the rachis eglandular; bracteoles ovate or greatly reduced and much shorter than the calyx, nervate, puberulent, persistent at least until anthesis; bracts ovate or lanceolate, nervate, puberulent; pedicels mostly longer than the calyx. Flowers blue, purple, violet, yellow or white; calyx mostly 2-lipped, the upper teeth partly united; standard symmetrical, orbicular, basally appendaged, the wings partly spiralled, apically cucullate, the keel in 2-3 spirals; vexillary stamen free, the free part of the others elongate, the anthers nearly uniform; ovary 1-many ovulate, the style apically thickened, curved in 1.5-2.5 spirals, hairy inside, distally caducous. Legume linear or oblong, straight or slightly curved, not septate, compressed or turgid, sometimes beaked; seeds 1-many, oblong to reniform, the hilum short and cen- tral.
|
|
Habit
|
Vines, herbs or subshrubs
|
|
Note
|
Phaseolus includes about 50 species, all of the New World, although under older circumscriptions, the genus may embrace 100-300 species. In Panama, Phaseolus is a genus of both uplands and of low elevations. Various members of the genus are widely cultivated for food in both temperate and tropical countries.
|
|
Key
|
a. Bracts conspicuous, foliaceous, more than 5 mm long; inflorescences dense, many flow- ered; pods pubescent. b. Bracteoles longer than the calyx; flowers bright red (white), 16-25 mm long; lowest calyx tooth conspicuously more tomentose than the others; pod more than 6 cm long; stipels more than 4 mm long; cultivated species ...... 1. P. coccineus bb. Bracteoles minute, shorter than the calyx; flowers red to purple (white), 11-15 mm long; lowest calyx tooth only slightly pubescent, hardly more so than the others; pod less than 6 cm long; stipels less than 4 mm long; native species ...... 3. P. tuerckheimii aa. Bracts inconspicuous, minute, less than 5 mm long; inflorescences open, few flowered; pods mostly glabrate. c. Pod straight, narrow, mostly 5-10 seeded; peduncle less than 1 cm long; flowers more than 10 mm long, the standard glabrate outside with a few hairs on the midvein; stipels more than 1.5 mm long ...... 4. P. vulgaris cc. Pod curved, broad, mostly 2-4 seeded; peduncle more than 2 cm long; flowers less than 10 mm long, the standard scattered pubescent outside; stipels less than 1.5 mm long ...... 2. P. lunatus
|
|
Tag
|
|
|
|
Project Name
|
|
Tag
|
|
|
|