ANALYTICAL KEY 23 



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



VIOLA CONSPERSA (p. 96). 

 ji Leaves compound. 

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

 shaped or spurred corolla; stamens six iDicentra). 

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

 spurs. Dutchman's Breeches, DICENTRA CUCTTLLABIA (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 (Legutninosae^ . 

 1. Leaves 7— 11 foliolate; flowers purplish-blue. 



Common Lupine, LTJPINUS PERENNIS (p. 82). 

 1. Leaves 3-foliolate. 

 m. Flowers in heads (Clover). 

 XL. Flowers sessile, red to rose-colored. 



Red Clover, TRIFOLIUM PBATENSE (p. 83). 

 n. Flowers pedicelled; pedicels reflexed in age. 

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



White Clover, TRIFOLIUM REPENS (p. 83). 

 0. Stems ascending, not rooting; flowers pink. 



Alsike Clover, TRIFOLIUM HYBRIDUM (p. 83). 

 m. Flowers in racemes (Sweet clover^. 

 u. Flowers yellow. 



Yellow Sweet Clover, MELILOTUS OFFICINALIS (p. 83). 

 n. Flowers white. 



White Sweet Clover, MELILOTTTS ALBA (p. 84). 

 m. Flowers in spikes, yellow. 



Black Medick, MEDICAGO LXTPULINA (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. 

 u. Flowers yellowish-white; leaflets 4—6. 



Wild Pea, LATHYRTJS OCHROLEtTCUS (p. 85). 

 II. Flowers purple or purplish; leaflets 6—14, 

 o. Peduncles 10—25 flowered; leaflets 8—12; stipules very small 

 and slender. Wild Pea, LATHYRUS VENOSTTS (p. 85). 



o. Peduncles 2—8 flowered. 

 p. Leaflets 10—14; plants of upland woods and banks. 



Wild Vetch, VICIA AMERICANA (p. 84). 

 p. Leaflets 4—8; plants of meadows and open swamps. 



Wild Pea, LATHYRITS PALUSTRIS '(p. 85). 

 g. Flowers epigynous. 

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

 rounded by a showy white involucre. 



Bunchberry, CORNXrS CANADENSIS (p. 100). 

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

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



Wild Sarsaparilla, ARALIA NTTDICAULIS (p. 97). 

 i. S^les and carpels three; umbel solitary (p. 24). 



Dwarf Ginseng* PANAX IRIFOLIXTU (p. 97). 



