610 FABACEAE 



than the tube : corolla nearly similar to that of C. Virginiana ; standard sparingly pubescent 

 without. 



In sand, peninsular Florida. 



2. Cracca Virginiana L. Hoot long, tough. Foliage villous-hirsute or canes- 

 cent throughout : stems woody at the base, tufted, simple, erect or ascending, 3-6 dm. 

 tall, angled and striate : leaves elliptic or linear-oblong in outline, 6-10 cm. long or 

 longer, nearly sessile ; stipules caducous ; leaflets 11-21, the blades of the lateral ones 1-3 

 cm. long, mainly oblong or elliptic, obtuse or acntish, apiculate, glabrous or nearly so above, 

 silky-villous beneath, often becoming glabrate with age : racemes often many-flowered : 

 calyx silky-villous ; lobes lanceolate, long-pointed, longer than the tube : corolla cream- 

 colored, tinged with purple or pink ; standard copiously pubescent without : pods 3-5 cm. 

 long, straight or somewhat curved, villous. 



In dry sandy soil, Ontario to Manitoba, Florida, Texas and Mexico. DEVIL'S SHOE-STRING. 



3. Cracca holosericea (Nutt. ) Small. Foliage pale green, densely pubescent. 

 Stems branched at the base, the branches tufted, 2-4 dm. tall, villous-hirsute : leaves mostly 

 8-12 cm. long ; leaflets 15-25, the blades of the lateral ones linear-oblong or linear-lanceo- 

 late, except the more or less cuneate terminal one, 1-2.5 cm. long, apiculate, conspicuously 

 and densely silky : racemes terminal, sessile ; rachis like the pedicels which sometimes 

 become 1 cm. long, densely villous-hirsute : calyx pubescent like the pedicels ; lobes 

 narrow, acuminate : corolla nearly 2 cm. long : pods linear, curved, 4-6 cm. long. 



On prairies, Arkansas and Louisiana and probably in Wisconsin and Illinois. 



4. Cracca Rug&lii (Shuttleworth) Small. Root woody. Stem branched at the base: 

 the several branches decumbent or assurgent, finely pubescent with bronze-colored hairs , 

 leaves nearly oblong in outline ; stipules 4-6 mm. long, persistent ; leaflets 3-11, the 

 blades of the lateral ones obovate, 8-17 mm. long, retuse and mucronulate, finely appressed- 

 pubescent and yellowish green above, much paler or even gray and prominently veiny 

 beneath : raceme terminating the stem, sometimes much reduced and represented by pairs 

 of flowers in the upper axils : calyx tawny-villous ; lobes very slender, nearly equal : 

 corolla probably purple at maturity : pods about 3-8 cm. long, somewhat falcate, tomentu- 

 lose. 



In pine woods, along the Manatee River, peninsular Florida. 



5. Cracca purpurea L. Root elongated, slender. Foliage strigillose or glabrate : 

 stems erect or ascending, 1-6 dm. long, branched, the branches spreading : leaves oblong or 

 linear-oblong in outline, 0.6-1 dm. long ; petioles 1-3 cm. long : stipules setaceous : leaf- 

 lets 7-17. the blades of the lateral ones linear, linear-oblong or oblong-cuneate, 2-5 cm. 

 long, obtuse or acute at both ends, apiculate, sometimes glaucous beneath : peduncles 

 2-sided : pedicel slightly longer than the calyx : calyx finely pubescent : lobes slender, 

 as long as the tube : corolla white, turning purple, 6-10 mm. long ; standard minutely 

 pubescent : pods linear, slightly falcate, 3-5 cm. long, strigillose or glabrate. 



In sandy soil, Florida to Arizona and Mexico. Also in eastern Central and South America to Brazil. 



6. Cracca gracillima (Robinson) Heller. Root relatively slender. Foliage glabrate 

 or minutely pubescent : stems prostrate, very slender, 3-6 dm. long, diffusely branching, 

 the branches flexuous : leaves linear-oblong in outline ; stipules 3-7 mm. long, setaceous, per- 

 sisting ; petioles 3-9 cm. long ; leaflets 5-17, the blades of the lateral ones linear, 1-3 cm. 

 long, acute at each end, minutely pubescent beneath : peduncles 5-10 cm. long: pedicels 

 7-10 cm. long : bracts setaceous, persisting : calyx quite long-pedicelled ; lobes lanceolate- 

 subulate, about the length of the tube : corolla purplish, 8-12 mm. long ; standard pubes- 

 cent : pods 3 cm. long or longer, 4 mm. wide, minutely hirsute, somewhat inflated at 

 maturity. 



In pine lands, near Eau Gallie, Indian River, southern Florida. 



7. Cracca ambigua (M. A. Curtis) Kuntze. Root woody, elongated. Foliage 

 hirsute with short spreading, somewhat viscid hairs : stems trailing or assurgent, 3-4 dm. 

 long or longer, often purplish, dichotomously branching, straggling, angled : leaves 7-15 

 cm. long, remote, linear-oblong in outline ; stipules 5-7 mm. long, lanceolate, persisting ; 

 petioles 3-8 cm. long ; leaflets leathery, 7-11, the blades of the lateral ones linear-oblong 

 to cuneate-oblong or obovate, 2-14 cm. long, acutish or mostly obtuse-apiculate, glabrous 

 and yellowish green above, appressed-hirsute with whitish hairs and the nerves often 

 turning reddish or purplish beneath : peduncles 1-1.5 cm. long, ancipital : calyx lobes 

 subulate, as long as the tube : corolla 10-13 mm. long ; standard pubescent : pods 4 cm. long 

 or more, 4 mm. wide, nearly straight. 



In high pine lands, dry soil. North Carolina to Florda and Mississippi. 



