54. Leguminosae 139 



5. Plants sparsely pilosulous or glabrate; lower calyx teeth 

 about 2 mm long; waste places, becoming common; nat. 



from Eur. May-July V. dasycarpa Ten. 



3. Racemes loosely 3-12 (-20) -flowered. 



6. Corolla 8-12 mm long, white, the keel tipped with blue; 

 racemes longer than or equalling the subtending leaves; 

 stipules entire; woods in the northeastern counties. May- 

 June. Carolina Vetch I', carolmiana Walt. 



6. Corolla 15-18 mm long, bluish purple; racemes shorter than 

 the subtending leaves; stipules sharply toothed; meadows 

 and thickets in the northern third of the state. June-July. 

 American Vetch V. arncricava Muhl. 



31. Lathyrus L. ^ Wild Pea 

 1 . Flowers purple, or purplish to pink or white. 

 2. Leaflets 4-14. 



3. Stipules much smaller than the leaflets; corolla 1-1.5 cm long. 

 4. Racemes 2- to 8-flowered; leaflets 4-8. 



5. Stem distinctly winged; leaflets linear to elliptical; 

 flowers 1.5-2.5 cm long; moist ground and open 

 woods in the n. half of 111. May-July. [L. palustris 

 var. linearifolius Ser.] L. palustris L. 



5. Stem merely angled; leaflets elliptical to oval; flowers 

 10-15 mm long; moist groimd and thickets, southw. 



to St. Clair and W^abash counties. June-July 



-- L. myrtifolius Muhl. 



4. Racemes 10- to 24-flowered; leaflets 8-14, oval; stem 4- 

 angled, puberulent or glabrous; open woods and moist 

 thickets, n. 111. May-June. [L. venosus var. intonsus 

 Butters & St.John] L. venosus Muhl. 



3. Stipules broad, foliaceous, nearly as large as the adjacent 

 leaflets; stem glabrous; leaflets 6-10, thick, oval; racemes 

 6- to 10-flowered; flowers about 2 cm long; sandy soil, 

 rare; near Lake Michigan. June-Aug. Beach Pea. [L. 



japonicus Willd. var. glaber (Ser.) Fern.] 



L. maritimus (L.) Bigel. 



2. Leaflets 2; stem and petioles winged. 



6. Perennial; peduncle with 4-10 flowers; frequently cultivated 

 and sometimes spontaneous; waste places and along roads; 

 introd. from Eur. E\erlasting Pea L. latifolius L. 



6. Annual; peduncle with 1-2 flowers; escaped from cult. Sweet 

 Pea L. odoratus L. 



1. Flowers yellowish-white; stipules large; leaflets ovate or broadly 

 oval; peduncles 2-5 cm long; stem terete; woods, n. 111. May- 

 July L. ochroleucus Hook. 



