96 LliGUMINOS^. (pulse I'-AJUIA.) 



5-7, cuneate-obovatc, obtuse or cmarginate, smooth above ; peduncles longer 

 than tlie leaves, terete, 2- 3-flowered ; calyx-teeth short, acute. — Varies with 

 smaller (^'- 1' long) leaves and flowers, the latter mostly solitary on the short 

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

 18' long. 



5. T. ambigua, M. A. Curtis. Hoary-pubescent, or nearly smooth ; stems 

 decumbent, angled ; leaves scattered, long-petioled (.5' - 6' long) ; leaflets 7-1.5, 

 distant, wedge-oblong, truncate or cmarginate at the apex, paler anil often 

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

 ling or exceeding the leaves, fcw-flowcrcd ; calyx-teeth short, acute ; flowers 

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

 July. 



6. T. angustissima, Shuttl. Smooth or nearly .so throughout; stems slen- 

 der, pi-ostrato, diffiisely branched ; leaves short-petioled ; leaflets 10-15, linear, 

 acute, mostly oppo.-iite ; racemes very slender, longer than the leaves, bearing 

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

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

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



14. INDIGOPERA, L. Indigo. 



Calyx 5-clcft. Vexillum roundish. Keel with a subulate spur on each side, 

 often clastieally rcflexed. Stamens diadelphous (9 & 1 ). Legume 1 -matiy- 

 sccded. 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. Caroliuiana, 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-seedcd. — Dry pine 

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

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



2. I. leptosepala, Nutt. JJough hairy ; stem decumbent ; leaflets 7-9, 

 obovate-oblong or cuneate ; racemes 6-1 5-flowered ; calyx-teeth slender-subu- 

 late ; flowers pale-scarlet ; legume linear, even, 6 - 9-seeded. — Georgia, Nutlall, 

 South Florida, Blodgett, and westward. — Stem 2° - 3° long. Legume 1^' 

 long, straight. 



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



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

 legume terete, torulose, 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 in some of the States, and em- 

 ployed in the manufacture of indigo.~ 



