ANALYTICAL KEY 27 



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

 m. Flowers in spikes, yellow. 



Black Medick, MEDICAGO LUPTTLINA (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. 

 ut Flowers yellowish-white; leaflets 4—6. 



Wild Pea, LATHYRUS OCHROLETTCUS (p. 85). 

 n. Flowers purple or purplish; leaflets 6—14. 

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

 and, slender. Wild Pea, LATHYRUS VENOSUS (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, LATHYRUS PALUSTRIS (p. 85). 

 j. Leaves simple, though sometimes lobed or divided. 

 k. Ovary 4-Iobed; leaves opposite (.Mint family), 

 1. Leaves petioled; stamens four, the upper (inner) pair longer 

 than the lower; plant creeping, strongly scented when bruised. 



Ground Ivy. NEPETA HEDERACEA (p. iii). 

 1. Upper leaves clasping; stamens four, the lower (outer) pair longer 

 than the upper; plant decumbent. 



Henbit, LAMIUM AMPLEXICAULE (p. 112). 

 k. Ovary 2-celled. 

 1. Stamens six or eight; corolla three-parted; flowers white, in a 

 close spike. Seneca Snakeroot, POLYGALA SENEGA (p. 87). 

 L Stamens two, four, or five (Scrophulariaceae). 

 m. Stamens two ; corolla wheel-shaped or salver-shaped, almost 

 regular .( Veronica) . 

 n. Annual, with axillary, solitary white flowers. 



Common Speedwell, VERONICA OFFICINALIS (p. 113). 

 n* Perennial. 

 o. Leaves pubescent, serrate; flowers pale blue, in axillary 

 racemes. 



Purslane Speedwell, VERONICA PEREGRINA (p. 114). 

 u. Leaves smooth or smoothish, obscurely crenate; flowers white 

 or pale blue with deeper stripes, in terminal racemes. Thyme- 

 leaved Speedwell, VERONICA SERPYLLIFOLIA (p. 114). 

 m. Stamens four, or with a rudiment of a fifth. 

 n. Corolla spurred at base; at least the upper leaves not opposite 

 (Toadflax). 

 o. Flowers yellow and orange. 



Butter and Eggs. LIN" ARIA VULGARIS (p. 112), 

 o. Flowers blue. LINARIA CANADENSIS (p. 112). 



a. Corolla not spurred at base. 

 o. Leaves opposite (p. 28). 

 p. Delicate annual with blue and white flowers. 



Blue-eyed Mary, COLLINSIA VERNA (p. 113). 

 p. Coarse perennial with greenish-purple flowers. 



Figwort. SCROPHULARIA MARILANDICA (p. 113). 



