350 THE KINDS OF PLANTS 



L. odoritus, Linn. Sweet pea. Figs. 165. 222. Annual, the stem hairy: 

 leaflets one pair, narrow-oval or oblong: flowers 2 or 3 on a long peduncle, 

 very fragrunt, in many colors. Southern Europe. 



L. latifolius, Linn. Everlasting pea. Fig 246. Perennial of long dura- 

 tion, sniootli, the slems winged; leaflets one pair, long-oval: flowers many 

 in a dense cluster on long peduncles, rose-purple and white. Europe. 



7. VlCIA. Vetch. Tare. 



Herbs, mostly trailing or climbing by tendrils from the ends of pin- 

 nately compound leaves: leaflets usually many, entire or emarginate: 

 stipules half-sagittate: flowers in axillary racemes or pairs: calyx somewhat 

 oblique, 5-toothed: wings adhering to keel: style slender, bent, hairy or with 

 hairy ring beneath stigma: pods flat, 2-valved, 2-several-seeded. 



V. Americana, Mulil. Perennial, smooth: leaflets 10-M, oblong, blunt: 

 peduncles 4-8-flowered: flowers purplish-blue, %-% in. long. Moist soil. 



V. Cricca, Linn. Perennial, more or less pubescent, with weak stems: 

 leaflets 12-24, oblong to linear, mucronate: racemes: many-flowered, 

 1-sided, spike-like, on axillary peduncles: flowers blue to purple, %-K in. 

 long. Dryish soil. 



V. sativa, Linn. Spring vetch. Annual, rather pubescent, not climbing: 

 leaflets, 5-7 pairs, oblong or obovate, to linear, obtuse or retuse or mucro- 

 nate: flowers in pairs, from axils, nearly sessile, violet-purple, %-l in. 

 long: pod smooth, linear, 5-10-seeded. Cultivated or wild: from Europe. 



V. villosa, Roth. Hairy or winter vetch. Difl'use, very hairy: flowers 

 showy in long axillary racemes, deep purple: seeds small and black. Culti- 

 vated and escaped. Europe. Annual and biennial, perhaps sometimes 

 perennial. 



8. TRIFOLIUM. Clover. 



Annual or perennial herbs with digitate leaves of 3 leaflets (all 3 leaflets 

 joined directly to top of petiole): flowers small, with bristle-form calyx- 

 teeth, in dense heads: fruit a 1- to few-seeded little pod which does not 

 exceed the calyx. 



a. Flowers sessile in the dense heads. 



T. prat6nse, Linn. Common red clover. Fig. 82. Erect, 1-2 ft., with 

 oval or obovate leaflets, which have a pale spot or band near the center 

 and usually a notch at the end: flowers rose-red, honey-sweet, the heads 

 closely surrounded by leaves. Europe, but common everywhere in the 

 North. 



T. medium, Linn. Medium red clover. Larger, the stem less straight, 

 the leaflets oblong, entire and with a spot: head stalked above the upper- 

 most leaves. Otherwise like the last. 



T. arv^nse, Linn. Rahhit- foot clover. Annual; 5-10 in., erect: flowers 

 sessile in dense, cylindrical heads, which become very soft and grayish, 

 fur like, from the silky plumose calyx-teeth: corolla insignificant, whitish. 

 Dry, sandy soils: introduced from Europe. 



