176 FABACEAE. 



long; pinnae 6-12 pairs, opposite, very nearly sessile, narrowly lanceolate, 5-10 

 cm. long; leaflets 12-36 pairs, opposite, coriaceous, linear-oblong, 5-10 mm. 

 long, revolute-margined, glabrous and shining above, obtuse at the apex, trun- 

 cate at the sessile base; panicles terminal, many-flowered, often 3 dm. long; 

 pedicels slender, 12-20 mm. long; calyx subglobose in bud, 5-6 mm. long, its 

 obovate segments imbricated, nearly equal; petals obovate, 7-10 mm. long; 

 stamens shorter than the petals; pod 4-5 cm. long, 12-15 mm. wide at the 

 middle. 



Scrub-lands and coppices, Andros, Great Exuma, Long Island : Cuba. HORSED 

 BUSH. 



Family 5. FABACEAE Rchb. 

 PEA FAMILY. 



Herbs, shrubs, vines or trees, Avith alternate mostly compound stipu- 

 late leaves, and irregular (papilionaceous) perfect or sometimes polygamo- 

 dioecious flowers, mainly in spikes, heads, racemes or panicles. Calyx 4-5- 

 toothed, or 4-5-cleft, sometimes 2-lipped. Petals more or less united, or 

 separate, perigynous or hypogynous, usually consisting of a broad upper 

 one (standard, banner), two lateral ones (wings), and two front ones 

 more or less united (forming the keel) ; the standard enclosing the wings 

 in the bud. Stamens monadelphons, diadelphous, or sometimes separate, 

 10 in most of the genera, sometimes 9, rarely 5. Pistil simple, superior; 

 ovary mainly 1-celled, sometimes 2-celled by the intrusion of the sutures, 

 or several-celled by cross-partitions; style simple; ovules 1-many, anatro- 

 pous or amphitropous. Fruit a legume, 1-many-seeded, dehiscent into 2 

 valves, or indehiscent, in one tribe a loment. Seeds mostly without endo- 

 sperm; cotyledons thick. About 325 genera and over 5000 species, most 

 abundant in temperate and warm regions. 



Filaments all separate. 



Petal only 1 : pod flat, short, winged. 1. Atclria. 



Corolla papilionaceous : pod turgid, elongated. 2. Sophora. 



Filaments monadelphons or diadelphous. 

 Herbs, shrubs or trees. 

 Fruit 2-valved. 



Leaves mostly trifoliolate. 



Leaflets entire. 3. Crotalnria. 



Leaflets serrulate. 4. Trifolium. 



Leaves pinnate. 



Leaves unequally pinnate. 



Pods 4-angled or turgid. 5. Tndigofcra. 



Pods flat. 6. Cracca. 



Leaves equally pinnate. 



Standard broad, longer than the keel-petals ; 



calyx-lobes acute or acuminate. 7. Scslxin. 



Standard narrow, shorter than the keel-petals ; 



calyx-lobes low and broad. S. Agati. 



Fruit a loment. 



Stamens all united into a tube. 9. Stylosantlies. 



Vexillar stamen free from the others. 



Joints of the loment flat. 10. Meibomia. 



Joints of the loment thick, fleshy. 11. Alyslcarpus. 



Fruit indehiscent. 



Leaves 1-foliolate ; pod suborbicular ; vine-like shrubs. 12. Ecastophi/llinn. 

 Leaves pinnate; pod elongated, 4-winged ; tree. 13. IcMJiyomcihia. 



Vines, our species herbaceous (Phascolus liithyroides an erect 



herb; Cajan erect and half-shrubby). 

 Keel of the corolla not curved nor coiled (somewhat bent 



in Canavali). 



Leaves equally pinnate, terminated by a bristle. 14. Abrtis. 



Leaves trifoliolate, rarely unifoliolate. 



Style bearded along the inner side. 15. Clltoria-. 



Style glabrous or sparingly pubescent below 

 (somewhat bearded in Dolichos). 



