Pea Family. :)~ 



D. alopeccroides Willd. Stem erect, 1-3 feet high, glabrous; leaflets 15- 

 41. oblanceolate or oblong 1 : calyx densely villous, teeth linear-lanceolate, 

 plumose. Roadsides and waste places: .luly-September: frequent. (Parosela 

 d<dca (L.) Pritton.) 



D. laxiflcra Parsh. Stem 1-4 feet high, from a long thick root, smooth, 

 much branched: leaflets 5-11. linear-oblong" or linear: flowers in small loose 

 spikes; calyx villous: teeth subulate, plumose: petals white: stamens 9. 

 Loess hills: June-August; common in the west counties: Woodbury. Harri- 

 son. Monona. I'otta wattomie. and Fremont counties. (P. enneandra (Xutt.) 

 Britton.) 



PETALOSTEMON Mx. PRAIRIE Clover. Perennial herbs, with odd- 

 pinnate leaves, minute stipules, and small flowers in peduncled oblong- heads. 

 Calyx .".-toothed. Sepals .">. much alike, 4 of them borne on the top of the 

 cleft sheath of monodelphous filaments and alternate with the 5 anthers. 

 the standard cordate or oblong, inserted in the bottom of the calyx. 



P. violaceus Mx. Glabrous or somewhat pubescent: leaflets 5, narrowly 

 linear: flowers in a dense globose or oblong head, violet purple. Prairies: 

 July-August: common. (Kuhnistera purpurea (Vent.) Mac M.) 



P. candidus Mx. Glabrous; leaflets 7- ( .». lanceolate or oblong-linear: 

 flowers in an oblong or cylindrical spike, white. With the last. (K. Candida 

 (Willd.) Kuntze.) 



P. villosus Xutt. Decumbent or ascending, densely villous: leaflets i: J >-17. 

 linear or oblong, spikes cylindric. villous; flowers rose-purple. Reported 

 from Story county. (Hitchcock.) (K. v'dlcsa (Xutt.) Kuntze.) 



TEPHROSIA Pers. Ours a perennial herb, with odd-pinnate non-punctate 

 leaves, and flowers in a terminal often compound raceme. Calyx teeth 5, 

 nearly equal: bractlets none. Petals clawed; standard large, orbicular, 

 silky externally: keel bluntish, cohering with the wings. Pod linear, flat. 

 several-seeded. 



T. virginiana Pers. GoaV-a Hue. Catgut. Stem 1-2 feet high, erect, hairy: 

 leaflets 9-20, linear-oblong, mucronate. odd leaflet notched or obcordate and 

 base cuneate: flowers yellowish white, marked with rose or purple, short- 

 pedicelled, large, clustered: pod villous, bristle-pointed. Sandy soil: June- 

 July: infrequent: Winneshiek. Allamakee, Fayette, Jackson, Delaware, Scott, 

 Muscatine. Louisa, and Johnson counties. (Cracca virginiana L.i 



ROBINIA L. Ours a small tree, with odd-pinnate leaves, spine-like 

 stipules, and flowers in hanging axillary racemes. Calyx short, 5-toothed, 2 

 upper teeth more or less united. Standard large, reflexed, but little longer 

 than the keel: wings free. Stamens diadelphous. ( .) and 1. Pod linear, flat, 

 several-seeded, margined. 



Pv pseudacacia L. False Acacia. Leaflets ovate-oblong; flowers showy. 

 fragrant, white: pod glabrous. Roadsides and waste places; May; an escape 

 from cultivation, frequent in the older settlements. 



ASTRAGALUS L. Perennial herbs, with odd-pinnate leaves, and racemose 

 or spicate flowers. Calyx .Vtoothed. Corolla slender, much exceeding the 

 calyx: standard narrow, equaling or exceeding the obtuse keel, reflexed or 

 spreading. Stamens diadelphous, ".» and 1. Pod varies, usually turgid, 2- 

 valved. 1 or 2-celled. few-many-seeded. 



* Pod 2-celled. 



A. caryocarpus Ker. Ground Plum. Low. prostrate, whitish pubescent: 

 root long, descending: leaflets 11-21. narrowly oblong: calyx tubular; corolla 



