520 



LEGUMINOSAE (^PULSE FAMILY^ 



D. glabellum. 



* * Stipules smaller, lanceolate and awl-shaped, less persistent ; racemes panicled, 



6. D. glabellum (Michx.) DC. Glabrous 

 or nearly so, procumbent ; leaflets ovate or 

 ovate-oblong, rather obtuse, much smaller 

 than in the two preceding (3-6 cm. long) ; 

 corolla purple ; pods 2-4-jointed, flat, the ovaU 

 rhomboid joints minutely scabrous through- 

 out. (D. humifusum Beck ; Meibomia gla- 

 bella Ktze.) — Dry sandy soil, Mass. to s. Pa., 

 Md., and south w. Fig. 788. 



§ 3. Pod slightly if at all stalked in the calyx; racemes panicled. 



* Stems tall (1-2 m. high) and erect ; the persistent stipides and decidtious bracts 



large and conspicuous, ovate or ovate-lanceolate, taper-pointed ; flowers rather 

 large. 



'*- Pods of 4-7 unequal-sided rhombic joints, which are considerably longer than 

 broad {about 1.2 cm. long). 



t. D. canlscens (L.) DC. Stem loosely branched, hairy, branches clothed 

 with both minute and hooked as well as longer spreading rather glutinous 

 hairs ; leaflets ovate., bluntish, about the length of the petioles, whitish and 



. D. canescens. 



reticulated beneath, both sides roughish with a close fine pubescence; joints 

 of the pod very adhesive. (Meibo7nia Ktze.) — Dry chiefly sandy soil, Mass. to 

 Minn, and south w. Fig. 789. Var. HiRstixuM (Hook.) Robinson. Panicle 

 and upper part of the stem very villous ; leaflets oblong-ovate. (D. canadense, 

 var. Hook. ; D. canescens, var. villosissimum T, & G.; Meibomia canescens, 

 var. hirsuta Vail.) — 111. and Mo. to Tenn. 



8. D. bractebsum (Michx.) DC. Very smooth except the panicle ; stem 

 straight ; leaflets lanceolate-ovate and taper-pointed, green and glabrous on both 

 sides, longer than 



the petiole ; the 

 conspicuous bracts 

 and stipules 1-1.6 

 cm. long ; joints of 

 the pod rhomboid- 

 oblong, smoothish. 

 (Z>. cuspidatum 

 Hook. ; Meibomia 

 brarteosa Ktze.) — 

 Thickets, s. N. H. 

 to Minn., and 

 southw. Fig. 790. 



Var. longifblium (T. & G.) Robinson. Stem with some persisting pube*. 

 cence ; leaflets scabrous above, villous beneath. (D. canadense, var. T. & G. ; 

 Meibomia longifolia Vail.) — Mich, to Kan. and Ark. 



•^ H- Pods of 3-5 oval joints (not over 6 mm. long). 



9. D. illinolnse Gray. Erect, 1-2 m. high ; stem and leaves with short 

 rough pubescence ; leaflets ovate-oblong or -lanceolate, 5-10 cm. long, obtuse, 



790. D. bracteosum. 



