134 KEY AND FLORA 



3. T. pratense L. RED CLOVER. Biennial or short-lived peren- 

 nial. Stems spreading, branching, downy, 1-3 ft. long. Leaves long- 

 petioled ; stipules large ; leaflets oval to obovate, finely toothed, often 

 with a dark triangular spot near the center. Flowers red or purple, 

 in globose heads, erect in fruit. Calyx teeth bristle-shaped, hairy. 

 Pod 1-3-seeded. Introduced from Europe and widely cultivated.* 



4. T. repens L. WHITE CLOVER. Perennial. Stems widely branch- 

 ing at the base, prostrate and creeping, nearly smooth, 6-12 in. 

 long. Leaves long-petioled ; leaflets oval, obovate, or obcordate, 

 minutely toothed. Heads globose, long-peduncled. Flowers white, 

 reflexed in fruit. Pod 3-4-seeded. Common about houses and in 

 pastures.* 



5. T. hybridum L. ALSIKE CLOVER. Perennial, considerably 

 resembling No. 4, but the stems more upright and stouter. Leaflets 

 varying from broadly ovate to ovate-lanceolate, mucronate or slightly 

 notched, the mai-gins fringed with hairs; stipules prolonged into 

 bristle-like points. Flowers rose color and white, very fragrant. In 

 fields and along roadsides. Introduced from Europe. 



6. T. carolinianum Michx. CAROLINA CLOVER. Perennial. Stems 

 spreading or ascending, much-branched, downy, 6-10 in. long. Leaves 

 short-petioled ; leaflets small, obovate or obcordate, slightly toothed. 

 Heads small, globose, on long peduncles. Flowers white, tinged 

 with purple, reflexed in fruit. Pod 4-seeded. Common in waste 

 places S.* 



7. T. procumbens L. Low HOP CLOVER. Annual. Stem slender, 

 erect or spreading, downy, 6-10 in. long. Leaves short-petioled; 

 leaflets obovate or obcordate, finely dentate, the middle one distinctly 

 stalked; stipules lance-ovate. Flowers yellow, reflexed in fruit. Pod 

 1-seeded. Common on clay soil, in waste places. Naturalized from 

 Europe.* 



XIII. MELILOTUS Hill. 



Annual or biennial herbs. Leaves petioled, of 3 leaflets. 

 Flowers small, white or yellow, in dense axillary and terminal 

 racemes. Calyx 5-toothed, the teeth nearly equal. Standard 

 erect, wings and keel cohering. Stamens 10, diadelphous. 

 Pod longer than the calyx, 1-4-seeded.* 



1. M. alba Lam. MELILOTUS. Biennial. Stem erect, branching, 

 smooth or the young branches slightly downy. Leaflets oblong or 

 oblanceolate, rounded or truncate at the apex, serrate; stipules small. 

 Racemes long, slender, erect. Flowers white. Standard longer than 

 the wings and keel. Pod ovoid, wrinkled, drooping, mostly 1-seeded, 

 scarcely opening. Common as a weed and widely cultivated.* 



