568 FLORA. 



5. Lathyrus decaphyllus Pursh. Prairie Vetchling (I. F. 1. 2219.) 

 Perennial, erect or ascending, glabrous or finely pubescent, 1.5-4.5 dm. high. 

 Stems angled; stipules half-sagittate, acuminate, 8-_5 mm. long; leaflets 3-7 pairs, 

 mucronulate, narrowed at the base, thick, reticulated, 2.5-6 cm. lung; stipules 

 olten wanting; peduncles usually shorter than the leaves; flowers 2.5-4 cm. long; 

 pod linear, seeds with a narrow stalk and short hilum. Kans. (?); Idaho and 

 Colo, to Ariz, and N. Mex. March-July. 



6. Lathyrus ornatus Nutt. Showy Vetchling. (I. F. f. 2220.) Closely 

 resembling the preceding, but generally lower, often less than 3 dm. high. Stipules 

 lanceolate or linear, 4-20 mm. long; leaflets narrow, acute and mucronate, 

 9-25 mm. long; tendrils commonly wanting; flowers 2.5-4 cm. long; pod linear; 

 seeds with abroad stalk and long hilum. Ind. Terr, to Kans., S. Dak., Colo, and 

 Utah. May-June. 



Lathyrus ornitus incinus Smith and Rydb. Plant densely villous-canescent. Neb. 

 and Colo. 



7. Lathyrus ochroleucus Hook. Cream-colored Vetchling. (I. F. f. 

 2221.) Perennial, glabrous, slightly glaucous; stem somewhat angled, climbing 

 or trailing, 3-8 dm. long; stipules broad, half-ovate and half-cordate, 1.7-2.5 cm. 

 long; leaves petioled; leaflets thin, pale beneath, ovate or broadly oval, rounded at 

 the base, 2.5-5 cm - l° n g; tendrils branched; peduncles shorter than the leaves; 

 flowers 5-10, 15-18 mm. long; pod oblong-linear, sessile, glabrous, 2.5-5 cm - l° n g- 

 On river banks and hillsides, N. J. to Quebec and arctic Am., Iowa, Wyo. and Br. 

 Col. May-July. 



8. Lathyrus pratensis L. Meadow Pea. Yellow Vetchling. (I. F. 

 f. 2222.) Perennial, glabrous or sparingly pubescent, climbing or straggling, 3-9 

 dm. long. Stems angled ; stipules lanceolate, half-sagittate, acuminate, 1.3-2.5 

 cm. long; leaflets oblong or linear-oblong, acute or acutish, mucronulate, 2.5-4 

 cm. long ; racemes exceeding the leaves; flowers 6-12, 12-17 mm - l° n g; pods 

 linear, glabrous, 2.5-4 cm. long. In waste places, Me., «N. Y., Mass. and Out. 

 Nat. from Europe. June-Aug. 



9. Lathyrus pusillus Ell. Low Vetchling. Annual, glabrous; stem 

 winged, 3-6 dm. long. Leaflets 1 pair, linear- lanceolate. 2-5 cm. long, acute; 

 stipules sagittate, 2 cm. long or more; peduncles elongated, 1-3-flowered; dowers 

 purple, small; pod 10-15-seeded. S. Car. to Miss., Kans. and Tex. Apr.-May. 



38. BRADBURYA Raf. [CENTROSEMA Benth.] 



Slender vines, with pinnately 3-foliolate leaves (rarely 5-7-foliolate), persistent 

 stipules, and large axillary flowers. Calyx campanulate, its teeth or lobes nearly 

 equal; standard orbicular, nearly flat, spurred on the back near its base; clawed; 

 wings obovate. curved; keel curved; stamens more or less diadelphous (9 and 1); 

 style incurved, bearded at the apex around the stigma; pod linear, flattened, nearly 

 sessile, partially septate between the seeds, 2-valved. the valves thick-edged, longi- 

 tudinally finely nerved along their margins. [In honor of John Bradbury, who 

 travelled in America early in the century.] About 30 species, natives of America. 

 Besides the following, another occurs in the Southern States. 



1. Bradburya Virginiana (L.) Kuntze. Spurred Butterfly-pea. (I. F, 

 f. 2223.) Perennial, finely rough-pubescent, 6-12 dm. long. Stipules linear, 

 acute; leaflets 3. ovate, or oblong-lanceolate, stipellate, rounded at the base, retic- 

 ulate-veined, 2.5-5 cm - l° n gi peduncles about equalling the petioles, I 4-flowered; 

 bracts ovate, acme, finely striate; flowers 2.5-4 cm. long; corolla violet; calyx- 

 lobes linear; pod 10-13 cm. long, Long-acuminate, its margins much thickened. 

 Dry sandy soil, N. J. to Fla., Ark., Tex. and tropical Am. july-Aug. 



39. CLITORIA L. 



Woody Tines, or erect or climbing herbs, with pinnately 3-foliolate (sometimes 

 5-9-foliolatei leavi it stipules, and large axillary flowers. Calyx tubular, 



5 toothed, the 2 uppi r teeth more or less united; standard large, erect, retuse, nar- 

 rowed at the base, not spurred; wings oblong, curved; keel acute, shorter than the 

 wings; stamens more or less monadelphoUSJ anthers all alike; ovary stipitate; style 



