520 



LEGUMINOSAE (PULSE FAMILY^ 



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



6. D. glabaium (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 oval- 

 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. 



D. glabellum. 



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



* Stems tall (1-2 m. high} and erect; the persistent stipules and deciduous bracts 

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

 large. 



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

 broad (about 1.2 cm. long}. 



7. D. canSscens (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 



789. D. canescens. 



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

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

 Minn, and southw. FIG. 789. Var. nmstiTUM (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 1-1.5 

 cm. long ; joints of 

 the pod rhomboid- 

 oblong, smoothish. 

 (D. cuspidatum 

 Hook. ; Meibomia 

 bracteosa Ktze.) 

 Thickets, s. N. H. 

 to Minn., and 

 southw. FIG. 790. 



Var. longifblium (T. & G.) Robinson. Stem with some persisting pubes- 

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

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



, -i- -H- Pods of 3-5 oval joints (n,ot over 6 mm. long}. 



9. D. illinoSnse 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. 



