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Phaseolus. LEGUMINOS^. 159 



Tribe II. PHASEOLEJE. Brmm ; Benth. 



Corolla papilionaceous. Stameris mostly diadelphous (9 <J- 1 ). Legume continuous, dehis- 

 cent, never separating into joints, hut often torose, and with cellular partitions between 

 the seeds. Cotyledons thick : radicle incurved. — Mostly tioining, herbaceous or shrubby 

 plants. Leaves usually pinnately trifoliolaie {rarely reduced to a single leaflet), some- 

 times unequally pinnate, stipellate. Inflorescence axillary. 



CONSPECTUS OF THE SUBTRIBES AND GENERA. 



Subtribe 1. EcPHASEOLEiE. Ovary with several ovules. Inflorescence racemose. Style often indurated above 

 the middle. Cotyledons thick, nearly unaltered in germination. 



♦ Leaves pinnaUly trifoliolak. 



4. Pbaseoll's. Keel, with the stamens and style, spirally twisted or circinate. 



•* Leaves unequally pinnaU. 



5. Apios. Keel, with the stamens and style, at length spirally twisted. Legume nearly terete. Root tuberous. Leaves 



5 - 7-foliolate. 



Subtribe 2. GLTCiNEiE. Ovary with several ovules. Inflorescence racemose. Style not indurated. Cotyledons 

 flattish, foliaceous in germination. 

 fi. Galactia. Calyx 4-cleft. Vexillum incumbent, broad, without callosities. Legume compressed, linear, many- 

 seeded. — Leaves pinnately trifoHolate. 



Subtribe 3. CLiTORiEiE. Ovary with several ovules. Vexillum large, not appendiculate at the base. Inflores- 

 cence axillary : peduncles 1 - many-flowered, often cymose-fasciculate. 



7. Clitoria. Calyx tubular, .5-cleft at the summit. Vexillum not spurred on the back. Style longitudinally hairy. 



Legume stipitate, hnear-oblong, torulose ; the valves nerveless.— Twining herbs, with trifoliolate leaves and very 

 large flowers. 



8. Amphicarpjea. Flowers of two kinds ; upper ones perfect, in many-flowered racemes, the legume Unear-oblong, 



3 - 4-seeded : lower flowers on prostrate branches (often subterraneous), imperfect or apetalous, producing obovate 

 1 - 2-6eeded legumes. — Twining herbs with trifoliolate leaves. 



Subtribe 1. Euphaseole^, Benth. Ovary with several ovules. Style of ten indurated above 

 the middle. Vexillum with two appendages at the base. Cotyledons nearly 

 unchanged in germination. 



4. PHASEOLUS. Linn. ; Endl. gen. 667i. KIDNEY bean. 



[ Latin, phaselus, a little boat ; from the form of the legumes.] 



Calyx campanulalc, 5-toothcd or 5-clefl ; the 2 upper teelh often more or less united. Keel, 

 witli the stamens and style, spirally twisted or circinate. Legume linear or falcate, more 

 or less compressed, or somewhat terete, many-seeded. Hilum small, oval-oblong, naked, 

 or rarely with a small membranaceous strophiole. — Herbaceous (in tropical countries often 

 Buffrutescent), twining or trailing plants. Leaves pinnately trifoliolate : leaflets with con- 

 spicuous stipellcs. Pedicels usually in pairs. 



