34 PAPILIONACEAE. 



Tribe Hedysareae. Herbs without tendrils, with pinnate leaves; pod a 

 loment or rarely 1-seeded. 



Desmodium. Leaflets stipellate; flowers of one kind: pod several- jointed. 

 LB8PEDBZA. Leaflets not stipellate; flowers of 2 kinds ; pod 1-2-jointed. 



Tribe Vicieae. Leaves evenly pinnate, terminating- in tendrils. 



Viciv . Wings adherent to the keel ; style bearded at the summit. 

 L xTHvaus. Wings nearly free ; style bearded along the inner side. 



Tribe Phaseoleae Leaves odd-pinnate; twining- or trailing plants. 



Apios. Twining; leaflets 5 -7. 



Strophostyles. Leaflets 3; flowers in capitate clusters, keel of the corolla strongly in- 

 curved. 

 Amphicakpaek. Leaflets 3; flowers racemose, gamopetalous and apetalous. 



BAPT1SIA Vent. False Indigo. Ours perennial herbs, with palmately 3- 

 foliate leaves which blacken in drying, and white or yellowish flowers in ter- 

 minal or lateral racemes. Calyx 4-5-toothed. Petals 5, nearly distinct and 

 about equal in length. Stamens 10, distinct. Pod stalked, roundish or 

 oblong, inflated, pointed, many-seeded. 



B. leucophaea Nutt. Stem 1-2 feet high, hairy, branches divergent; 

 leaves sessile or nearly so, leaflets oblanceolate or spatulate, obtuse or acut- 

 ish: stipules and bracts large, leafy, persistent; flowers in a long reclined 

 raceme, white or yellowish; pedicels slender; pod short stalked, hairy, with a 

 long recurved apical point. Prairies and pastures; May; common. (B. 

 bracteata Ell.) 



B. leucanthci T. & G. Stem smooth, 1-3 feet high, much branched; 

 leaves petioled; leaflets obovate or oblanceolate, obtuse; stipules lanceolate, 

 usually a little shorter than the petioles, deciduous; raceme elongated, 

 loosely flowered; flowers white; pod ellipsoidal, long-stalked, tipped with a 

 subulate style. Low grounds; June-July; common. 



B. tinctoria (L.) R. Br. Plant glabrous; flowers yellow, in numerous 

 terminal racemes; pods ovoid to nearly globose, tipped with a subulate style. 

 Reported from Johnson county by Prof. Shimek. 



Ci^OTALARJA L. Herbs, with simple leaves, and yellow flowers on long 

 peduncles which are 2-4-flowered. Calyx 5-cleft, slightly 2-lipped. Standard 

 large, cordate; keel scythe-shaped; sheath of the stamens cleft on the upper 

 side; 5 of the anthers smaller; pod inflated, with many loose seeds. 



C. sagittal is L. Rattle-box. Annual, 1 foot high or less, hairy, branched; 

 leaves sessile or nearly so, entire, oval, oblong or lanceolate, stipules acumi- 

 nate, united, decurrent; corolla equal or shorter than the calyx. Sandy soil, 

 along water courses or dry uplands; June-September; frequent; Muscatine, 

 Johnson, Woodbury, and Fremont counties. 



LUPIN US L. Herbs, with palmately many-foliate leaves, and terminal 

 racemose flowers. Calyx deeply 2-lipped, upper lip 2-cleft, lower entire or 3- 

 toothed; standard reflexed laterally; keel crescent shaped; stamens monodel- 

 phous, sheath entire; anthers alternately oblong or globose; pod knotty, ob- 

 long, compressed. 



L. perennis L. Wild Lupine. Perennial; stem 1-2 feet high, more or less 

 pubescent; leaves 5-9-foliate, leaflets oblanceolate, mucronate; flowers in a 

 long raceme, purplish blue to white, showy; pod linear-oblong, hairy, 5-6- 

 Beeded. May-June; Winneshiek county. 



TRI FOLIUM L. CLOVER. Herbs, with 3-foliate denticulate leaves, and 

 capitate or spicate flowers, Stipules large, adnate to the petiole. Calyx 5- 

 toothed, persistent, teeth nearly equal. Corolla withering or persistent; 



