90 LEGUMINOSjK. (PULSE FAMILY.) 



5-7, cuneatc-obovatc, obtuse or cmarginatc, smooth above ; peduncles longer 

 tban tbc leaves, terete, 2 - 3-flowcrcd ; calyx-teeth short, acute. — Varies with 

 smaller (V - l'long) leaves ami flowers, the latter mostly solitary on tbc short 

 peduncles. — Dry pine barrens, Florida, Georgia, and westward. — Stems 6'- 

 18' long. 



5. T. ambigua, M.A.Curtis. Iloary-pubcsccnt, or nearly smooth ; stems 

 decumbent, angled ; leaves scattered, long-petioled (5' -6' long) ; leaflets 7- 15, 

 distant, wedge-oblong, truncate or cmarginatc at tbc apex, paler and often 

 smooth above, purplish and .strongly veined beneath ; peduncles flattened, equal- 

 ling or exceeding the leaves, few-flowered ; calyx-teeth sbort, acute ; flowers 

 white and purple. — Dry sandy soil, Florida to North Carolina. June and 

 July. 



6. T. angUStissima, Sbuttl. Smooth or nearly so throughout; stems slen- 

 der, prostrate, diffusely branched ; leaves short-petiolcd ; leaflets 10- 15, linear, 

 acute, mostly opposite ; racemes very slender, longer than the leaves, bearing 

 2-4 small scattered flowers; calyx slightly pubescent, with triangular-ovate 

 acute teeth. — South Florida, Ritgel — Stem 1° long. Leaflets 8" -12" long, 

 1" wide, spreading. Corolla about 3" long. 



14. INDIGOFERA, L. Indigo. 



Calyx 5-cleft. Vcxillum roundish. Keel with a subulate spur on each side, 

 often clastically reflcxed. Stamens diadelphous (9 & 1 ). Legume 1 -many- 

 seeded. Seeds usually truncated at each end, often separated by membrana- 

 ceous partitions. — Herbs with unequally pinnate leaves, and white, brownish, or 

 purplish axillary flowers. Legumes drooping. 



* Racemes longer than the leaves. — Indigenous species. 



1. I. Caroliniana, Walt. Smoothish ; stem erect, tall, branching ; leaf- 

 lets 10-15, obovate or oblong; racemes many-flowered ; calyx teeth short, 

 acute; flowers yellowish-brown; legume oblong, veiny, 2-seeded. — Dry pine 

 barrens, Florida to North Carolina. July and August. 1J. —Stem 3° -5° 

 high. Flowers small. Legume 4" -5" long. 



2. I. leptOSepala, Nutt. Rough hairy ; stem decumbent ; leaflets 7-9, 

 oborate-oblong or cuneate i racemes G- 15-flowercd ; calyx-teeth slender-subu- 

 late ; flowers pale-scarlet; legume linear, even, G-9-seeded. — Georgia, Xuttall, 

 South Florida, Blodgett, and westward. — Stem 2°-3° long. Legume l£' 

 long, straight. 



* * Racemes shorter than the leaves. — Introduced species. 



3. I. tinctoria, L. Stem erect; leaflets 9-11, oval, pubescent, beneath; 

 legume terete, torulo-e, curved — Waste places. August. 



4. I. Anil, L. Stem erect ; leaflets 7 - 15, oval ; legume compressed, even, 

 thickened at each suture. — Waste places, 



These two species were formerly cultivated iu some of the States, and em- 

 ployed in the manufacture of indigo. 



