96 LEGUMINOS-E. (I'Ul.SK FAMILY.) 



5-7, cuncate-obovatc, obtuse or emarginatc, smooth above ; peduncles longer 

 tban the leaves, terete, 2 - 3-flowercd ; 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 7-15, 

 distant, wedge-oblong, truncate or emarginate at the apex, paler and often 



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

 ling or exceeding the leaves, few-flowered ; 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, prostrate, diffusely branched ; leaves short-petioled ; 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, Rugel. 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 elastically reflexcd. Stamens diadelphous (9 & 1). Legume 1 -many- 

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

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

 purplish axillary flowers. Legumes drooping. 



* Racemes lonyer 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 vellowish-brown ; legume oblong, veiny, 2-seeded. Dry pine 

 barrens, Florida to Nortlf Carolina. July and August. 1|. Stem 3 - 5 

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



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

 obovate-oblong or cuncate ; racemes 6-1 5-flowcred ; calyx-teeth slender-subu- 

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

 South Florida, Blodyett, and westward. Stem 2 -3 long. Legume 1^' 

 long, straight. 



* * Racemes shorter than the leaves. Introduced species. 



3. I. tinctoria, 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 ; ljgume 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. 



