Pea Family. 39 



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



monodclphous below; leave* petiolcd. 



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; cord- 

 men. (.If. grandijtora (Walt.) Kuntze.) 



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

 leaflets ovate or oval, acuminate or blnntish; peduncle elongated, arising 

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

 woodlands; July-August; infrequent; Muscatine and Cedar counties. {31. 

 nvdlflnra (L.) Kuntze.) 



* * Pod constricted on botli margins, more deeply below than above; leaves 



petiolcd. 



t Joints of the pod longer than broad ; stipe about the length of the calyx-lobe*. 



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. (.17\ 

 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. (31. longifolia (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 3-7-jointed, joints obliquely oblong, twice as 

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

 bractepsa (Ms.) Kuntze.) 



f f 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; Fayette, Muscatine, Henry, Story, Decatur, Page, and Ringgold 

 counties. 



f f + Pods long-st<dkcd; joints little longer than broad. 



D. dillenil 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. {31. dlllcnii (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 Buren, 

 Decatur, and Fremont counties. (31. punlculata (L.) Kuntze.) 



