ANALYTICAL KEY 23 



n. Stipules fringed, toothed; spur at least twice as long* as broad. 



VIOLA CONSPERSA (p. 96). 

 J. Leaves compound. 



k. Leaves without stipules; sepals two; petals four, forming a heart- 

 shaped or spurred corolla; stamens six (Dicentra). 

 1. Underground stem a granulate bulb; corolla with two divergent 

 spurs. DUTCHMAN'S BREECHES, DICENTRA CTJCTTLLARIA (p. 69). 

 1. Underground stem with scattered grain-like tubers; corolla heart- 

 shaped. SQUIRREL CORN, DICENTRA CANADENSIS (p. 70). 

 k. Leaves with stipules; sepals five, more or less united; petals five; 



stamens ten (Leguminosae). 

 1. Leaves 711 foliolate; flowers purplish-blue. 



COMMON LUPINE, LUPINUS PERENNIS (p. 82). 

 1. Leaves 3-foliolate. 

 m. Flowers in heads (.Clover). 

 n. Flowers sessile, red to rose-colored. 



RED CLOVER, TRIFOLIUM PRATENSE (p. 83). 

 n. Flowers pedicelled; pedicels reflexed in age. 

 O. Plant creeping, the stems rooting freely; flowers white. 



WHITE CLOVER, TRIFOLIUM REPENS (p. 83). 

 o. Stems ascending, not rooting; flowers pink. 



ALSIKE CLOVER, TRIFOLIUM HYBRIDUM (p. 83). 

 m. Flowers in racemes (.Sweet clover). 

 n. Flowers yellow. 



YELLOW SWEET CLOVER, MELILOTUS OFFICINALIS (p. 83). 

 n. Flowers white. 



WHITE SWEET CLOVER, MELILOTUS ALBA (p. 84). 

 m, Flowers in spikes, yellow. 



BLACK MEDICK, MEDICAGO LUPULINA (p. 84). 

 1. Leaves abruptly pinnate, terminated by a tendril; leaflets four 



or more. 



m. Flowers small, a centimeter or less in length, white, tinged 

 with blue. WILD VETCH, VICIA CAROLINIANA (p. 84). 



m. Flowers more than a centimeter in length. 

 n. Flowers yellowish-white; leaflets 46. 



WILD PEA, LATHYRUS OCHROLEUCUS (p. 85). 

 n. Flowers purple or purplish; leaflets 614. 



o. Peduncles 1025 flowered; leaflets 812; stipules very small 

 and slender. WILD PEA, LATHYRUS VENOSUS (p. 85). 



O. Peduncles 28 flowered. 

 p. Leaflets 1014; plants of upland woods and banks. 



WILD VETCH, VICIA AMERICANA (p. 84). 

 p. Leaflets 48; plants of meadows and open swamps. 



WILD PEA, LATHYRUS PALUSTRIS (p. 85). 

 J. Flowers epigynous. 



h. Sepals, petals, and stamens four; style one; flowers greenish, sur- 

 rounded by a showy white involucre. 



BUNCHBERRY, CORNUS CANADENSIS (p. 100). 

 h. Sepals, petals, and stamens five; flowers in umbels. 

 i. Styles and carpels five; umbels two or more. 



WILD SARSAPARILLA, ARALIA NUDICAULIS (p. 97). 

 i. Styles and carpels three; umbel solitary (p. 24). 



DWARF GINSENG, PANAX TRIFOLIUM (p. 97). 



