>22 



LEGUMINOSAB (pulse FAMILY) 



D. canadense. 



Sandy soil, s, e. 

 and Tex. 



Mass. 



lanceolate or ovate-lanceolate, obtuse, with numer. 

 ous straightish veins, much longer than the petiole, 

 3.7-7.5 cm. long ; flowers showy, larger than in any 

 of our other species, 8-12 mm. long. {Meihomia 

 Ktze.) — Open woods and banks of streams, N. B. 

 to N. C, L. Winnipeg, Kan., and Okla. Fig. 797. 



16. D. sessilifblium (Torr.) T. &G. Stem pubes- 

 cent, 6-12 dm. high; leaves nearly sessile; leaflets 

 linear or linear-oblong, blunt, thickish, reticulated, 

 rough above, downy beneath ; branches of the 

 panicle long; flowers small. {Meibomia Ktze.) — 

 to Pa. ; and from 0. and Mich, to 111., s. to Miss. 



4- <- Stems ascending, 3-9 dm. high ; bracts small ; racemes or panicles elon- 

 gated and loosely flowered ; flowers small. 



17. D. rlgidum (Ell.) DC. Stem branching, somewhat hoary, like the lower 

 surface of the leaves, with a close roughish pubescence ; leaflets ovate-oblong, 

 blunt, thickish, reticulated-veiny, rather rough above, the lateral ones longer 

 than the petiole. {Meibomia Ktze.) — Dry hillsides, s. N. H. 

 and e. Mass. to Fla., Mich., Neb., and La. Fig. 798. 



18. D. obtiisum (Muhl.) DC. Stem slender, hairy or rough- 

 pubescent; leaves crowded, on very short hairy petioles ; leaflets 

 round-ovate or oval, thickish, more or less hairy on the margins 

 and underneath, 1.2-2.5 cm. long. (D. ciliare DC. ; Meibomia 

 obtusa Vail.) — Dry hills and sandy fields, Mass. to Fla., w. to 

 Ont., Mich., Mo., and Tex. 



19. D. marilindicum (L.) DC. JVeoWi^ smooth throughout, slender ; leaflets 

 ovate or roundish, very obtuse, thin, the lateral ones about the length of the 



slender petiole ; otherwise resembling the preceding. (Meibomia 

 Ktze.) — Copses, Mass. to Fla., w. to Minn., Mo., and La. 



I- <- H- Stems reclining or prostrate ; racemes loosely floioered. 



20. D. lineatum (Michx.) DC. Stem minutely pubescent, 



striate-angled ; leaflets orbicular, smoothish, 1-2.5 cm. long, 



much longer than the petiole ; pod scarcely stalked in the calyx. 



(Meibomia arenieola Vail.) — Dry soil, Md. and Va to Fla and 



also (?) Erie Co., O. (Moseley). Fig. 799. 



D. rigidum. 



D. llneatntn. 



89. LESP£d£;ZA Michx. Bush Clover 



Calyx 6-cleft ; the lobes nearly equal, slender. Stamens diadelphous (9 and 

 1) ; anthers all alike. Pods of a single 1-seeded joint (sometimes 2-iointed, with 

 the lower joint empty and stalk-like), oval or roundish, flat, reticulated. — 

 Herbs with pinnately 3-foliolate leaves, not stipellate. Flowers often polyga- 

 mous, in summer and autumn. (Dedicated to Lespedes, the Spanish governor of 

 Florida in the time of Michaux.) 



u. Stiuules siibulate-aetaceoua ; bracts minute; calyx-lobes attenuate; 

 " perennials 6. 

 &. Flowers of 2 kinds; the larger (violet-purple) perfect but seldom 

 fruitful, racemose or panicled ; the smaller pistillate and fertile 

 but mostly apetalous, in small sessile clusters or intermixed with 

 the others e. 

 0, Petalifentus flowers 1-6, on elongate filiform peduncles, which are 

 mostly 2-4 times as long as their subtending leaves. 



Stems soft-downy with short spreadiuff liairs 1. X. proeumbeTis 



Stems glabrate or sparingly appressed-pubescent. 

 Stems prostrate or trallthp ; stipules mostly 2-4.5 mm. long . 2. Z. repene. 

 Stems upright; stipules mostly 6-8 mm. long .... 8. L. molaota, 

 c. Petaltferons flowers few-many ; peduncles stouter, some or all of 

 them shorter than the leaves d. 

 d. Many of the peduncles elongate and exceeding their subtending 

 loaves. 



