Pea Family. 35 



petals united at the base: standard oblong or obovate, reflexed. Stamens 

 diadelphous, and 1: pod included in the calyx or scarcely longer, 1-S- 

 seeded. 



T. pratense L. Red C. Perennial; stems ascending, somewhat pubescent: 

 leaflets oval or obovate, obtuse or emarginate, with a pale spot on the upper 

 surface: stipules large, bristle pointed; heads globular, sessile; flowers rose 

 purple, sweet scented: lower tooth of the calyx longer than the 4 other equal 

 ones. Meadows: May-September: common. 



T. repens L. White C. Perennial, low, creeping; leaves long-petioled; 

 leaflets obcordat/e, minutely toothed; stipules narrow, scarious: flowers in a 

 long-peduneled globular head, white; calyx small, teeth short; corolla twice 

 the length of the calyx. Fields and waste places; May-September; common. 



T. hybridum L. Alxikc C. Perennial, stems erect or suberect, somewhat 

 pubescent; leaflets much as in T. repens: flowers rose-tinted. Fields and 

 waste places; May-September: frequent. 



T. reflexum L. Buffalo V. Annual or biennial, erect or procumbent, 

 glabrous or pubescent; leaflets obovate or ovate-oblong; stipules foliaceous, 

 ovate-acuminate; flowers in a large head, slender pedicelled, at length re- 

 flexed; calyx short; calyx-teeth very long and narrow; standard rose-red, 

 wings and keel whitish. Sandy soil near river banks: April-August; infre- 

 quent; Muscatine, Johnson, Benton, Clinton, and Union counties. 



T. stoloniferum Muhl. Perennial; glabrous, with long basal runners; 

 leaflets obovate or obcordate; stipules ovate-lanceojate, membranous: flowers 

 white, with a purplish tiiige. Reported from Woodbury county. 



T. artfense L. Annual, silky, about 8 inches high, simple or branched; 

 leaflets oblanceolate: heads oblong; calyx-teeth bristle-like, plumose; petals 

 whitish. Fields; infrequent; Winneshiek and Story counties. 



T. agrarium L. Yullmo C. Annual, six inches or more high, upright; 

 leaflets obovate or oblong; stipules linear-lanceolate; flowers in. oblong or 

 oval heads, yellow. Waste places; infrequent; Story county. 



T. procumbens L. Low Hop C. Annual, 3-6 inches high, procumbent or 

 ascending, pubescent; leaflets cuneate-obovate; stipules ovate: heads globose, 

 yellow. Meadows and pastures; infrequent; Fayette, Johnson, Lee, Story, 

 and Winnebago counties. 



MELILOTUS Juss. Biennial smooth herbs, with 3-foliate petioled leaves, 

 dentate leaflets: subulate stipules, and small flowers in slender spike-like 

 racemes. Calyx small, 5-cleft; teeth short, nearly equal. Corolla about twice 

 the length of the calyx. Stamens diadelphous. Pod longer than the calyx, 

 ovoid, wrinkled, coriaceous, 1-2-seeded. 



M. alba Desv. White Melilot. Sweet Clover. Stem 2-R feet high; leaflets 

 oblong or oblanceolate; flowers white, standard longer than the other petals. 

 Waste places; June—September; becoming common. 



M. officinalis (L.) Lara. Yellow M. Resembling the preceding: leaflets 

 ovate, oblong, or oblanceolate; flowers yellow, standard about equaling the 

 wings and keel. Waste places; infrequent. 



MEDICAOO L. Leaves pinnately 3-foliate, petioled; leaflets denticulate. 

 Calyx 5-cleft. Stamens diadelphous, 9 and 1. Pod 1-several seeded, incurved 

 or coiled. 



M. sativa L. Luceime. Alfalfa. Perennial, suberect, glabrous; leaflets 

 ovate or oblanceolate; stipules lance-linear; raceme few flowered; flowers 

 violet-purple; pod spirally coiled. Waste places; June-September; infre- 

 quent, widely distributed. 



