292 PAPILIONACEAE. [Von. Il. 
18. INDIGOFERA L,. Sp. Pl. 751.1753. 
Herbs, or rarely shrubs, often canescent with hairs affixed by the middle, with odd-pin- 
nate leaves, small stipules, and pink or purple spicate or racemose flowers. Calyx-teeth ob- 
lique, nearly equal, or the lower longer. Standard ovate or orbicular, sessile or clawed; 
wings oblong; keel erect, somewhat gibbous, or spurred. Stamens mainly monadelphous; 
anthers all alike. Ovary sessile or nearly so, I--ovuled; style slender. Pod linear, 4- 
angled (in our species), septate between the seeds. [Name from the yield of indigo by 
some species. ] 
About 250 species, natives of warm and temperate regions. In addition to the following, some 
5 others occur in the southern and southwestern United States. 
1. Indigofera leptosépala Nutt. Wild or Western 
Indigo-plant. (Fig. 2116.) 
Indigofera leptosepala Nutt.; T. & G. Fl. N. A. 1: 298. 1838. 
Perennial, decumbent, cinereous-pubescent, slender, branch- 
ing, 6/-24’ long. Leaves short-petioled; leaflets 5-9, oblanceo- 
late or oblong-linear, 3/’-12/’ long, 1//-3’’ wide, obtuse and 
often mucronulate at the apex, narrowed or cuneate at the base, 
short-stalked; spikes peduncled, loosely few-flowered; flowers 
pink or purplish, about 3’’ long; calyx-teeth subulate, equal; 
pods linear, acute, obtusely 4-angled, sessile in the calyx, 8//— 
12’/ long, 1/’ thick, reflexed at maturity. 
Prairies, Kansas to Texas and Mexico, east to Florida. May- 
Nov. 
19. CRACCA I,. Sp. Pl. 752. 1753. 
[TEPHROSIA Pers. Syn. 2: 328. 1807.] 
Herbs, sometimes slightly shrubby, with odd-pinnate not punctate leaves, and purple red 
or white flowers in terminal or lateral racemes or short clusters. Stipules small. Leaflets 
entire. Calyx-teeth usually nearly equal. Petals all clawed. Standard orbicular or broadly 
ovate; wings obliquely obovate or oblong; keel curved. Stamens monadelphous or diadel- 
phous; anthers all alike. Ovary sessile; ovules several or many. Pod linear, flat, 2-valved, 
several-seeded, continuous, or with membranous septa between the seeds. [Latin, vetch.] 
About 120 species, mainly natives of warm and tropical regions. Besides the following, eleven 
species occur in the southern and southwestern United States. 
Raceme terminal, dense, nearly sessile, many-flowered. 1. C. Virginiana. 
Peduncles lateral and terminal, elongated, few-flowered. ; 
Villous; flowers in an interrupted spike or raceme. 2. C. spicata. 
Pubescent; peduncles few-flowered near the summit. . C. hispidula. 
wo 
1. Cracca Virginiana IL. Cat-gut. 
Goat’s Rue. (Fig. 2117.) 
Cracca Virginiana I,. Sp. Pl. 752. 1753. 
Galega Virginiana I,. Sp. Pl. Ed. 2, 1062. 1763. 
Tephrosia Virginiana Pers. Syn. 2: 329. 1807. 
Erect or ascending, more or less villous or 
silky-pubescent with whitish hairs, 1°-2° high. 
Roots long, fibrous, tough; leaves short-petioled; 
leaflets 7-25, oblong, linear-oblong or the ter- 
minal one oblanceolate, narrowed or cuneate at 
the base, rounded, mucronate or emarginate at 
the apex, 9//-12/’ long, 2’’-4’’ wide; flowers 
yellowish-purple, 6’’-9’” long, crowded in a 
terminal often compound nearly sessile raceme; 
pedicels 2’’-4’’ long; pod linear, densely pubes- 
cent, 1/2’ long. 
In dry sandy soil, southern New England, shore 
of Lake Erie, to Minnesota, south to Florida, Louisi- 
ana and northern Mexico. Called also Hoary 
Pea, Wild Sweet Pea. June-July. 
