Pea Family. 39 



* Pod long-stalked, not constricted above but deeply constricted below; stamens 



monodelphous below; leaves petioled. 



D. acuminatum DC. Stem erect, glabrous or somewhat pubescent, 1-1 

 feet high; leaves clustered at the summit of the stem; leaflets ovate, acumi- 

 nate, remotely pubescent: stipules subulate, mostly persistent: peduncle 

 arising- from the cluster of leaves: panicle large, naked, bracts deciduous; 

 flowers large, purple: pods 2-3-jointed. Rich woods; June-September: com- 

 mon. (M. grandiflora (Walt.) Kuntze.) 



D. nudiflorum DC. Leaves crowded at the summit of the sterile stems; 

 leaflets ovate or oval, acuminate or bluntish: peduncle elongated, arising 

 from the base of the plant: panicle narrow, the few flowers rose-purple. Hilly 

 woodland?: July-August: infrequent: Muscatine and Cedar counties. (M. 

 nudiflora ( L.) Kuntze.) 



* * Pod constricted on both margins, more deeply below than <d>ove; leaves 



petioled. . 



I Joints of the pod longer than broad; stipe about the length of the calyx-lobes. 



D. canescens DC. Stem much branched, 3-5 feet high, hairy: leaflets 

 ovate, acutish or obtuse, equalling the petioles, scabrous above, whitish and 

 somewhat pubescent beneath, ciliate: stipules ovate, acuminate, persistent: 

 pods 4-6-jointed. joints unequally rhomboidal. longer than wide. Rich soil; 

 July-September; infrequent: Muscatine, Johnson, and Lee counties. (M. 

 canescens (L.) Kuntze.) 



D. longifolia (T. £ G.) Stem 2-5 feet high, angled, branched, minutely 

 pubescent: leaves petioled: leaflets ovate or ovate-lanceolate, long-acuminate, 

 scabrate above, slightly villous beneath; pods with 4-6 triangular-oblong or 

 lozenge-shaped joints. Woods: July-August: infrequent; Decatur and Page 

 counties. {M. UmgifolUi (T. & G.) Vail.) 



D. cuspidatum T. & G. Stem 3-6 feet high mostly glabrous below, finely 

 pubescent above; leaflets ovate or ovate-lanceolate, long-acuminate, glabrous, 

 above, glaucous beneath: pods 3-T-jointed. joints obliquely oblong, twice as 

 long as wide. Reported by Arthur as belonging to the flora of Iowa. (M. 

 bracteosa (Mx.) Kuntze.) 



+ + Pod sessile or nearly so: joints oval. 



D. illinoense Gray. Stem erect. 2-4 feet high, uncinate-pubescent: leaflets 

 lanceolate or ovate-lanceolate, bluntish, coriaceous, scabrous above, strongly 

 reticulated and cinereous beneath: stipules ovate, acute, persistent: pods of 3- 

 6 oval or orbicular joints. Dry soil, prairies and woods: June-September: 

 frequent: Fayetce. Muscatine. Henry, Story, Decatur, Page, and Ringgold 

 counties. 



+ \ + Pods Umg-statked; joints little longer than broad. 



D. dillenii Darl. Stem 2-3 feet high, glabrous or pubescent: leaflets thin, 

 oval to oblong-ovate, obtuse, pubescent or villous beneath: stipules small, 

 subulate; pods of 2-4 triangular joints: stipes shorter than the calyx lobes. 

 Borders of upland woods: June-August: frequent: forms have been referred 

 to this species from Jones, Muscatine, Lee, Johnson, Story. Chickasaw, and 

 Fremont counties. [M. diUenii (Darl.) Kuntze.) 



D. paniculatum DC. Stem nearly glabrous, 2-4 feet high; leaflets ob- 

 long-lanceolate or linear-lanceolate, obtuse, thin: stipules small, subulate, 

 deciduous: pods of 4-6 obliquely triangular or rhomboidal joints. Dry woods: 

 July-September: infrequent: Fayette, Johnson. Des Moines. Van liuren, 

 Decatur, and Fremont counties. [M. paniculata (L.) Kuntze.) 



