PA PI LION A CEA E. 565 



ovate, acute or acuminate, 2-4 mm. long; petioles much shorter than the leaves; 

 leaflets oblong or oblong-obovate, 9-20 mm. long, obtuse, narrowed at the base; 

 flowers 1-3 together, sessile or nearly so in the axils ; corolla pink or purple, about 



12 mm. long; calyx-lobes ovate; pod oval, acute, exceeding the calyx-lobes. In 

 fields, Va. to 111., Mo., Kans. and very common in the Southern States. Nat. 

 from eastern Asia. July-Aug. 



36. VICIA L. 



Climbing or trailing, herbaceous vines, with pinnate tendril-bearing leaves, 

 half-sagittate or entire stipules, and axillary, mostly racemose, flowers. Calyx-tube 

 somewhat oblique, obtuse at the base, its teeth about equal. Standard obovate or 

 oblong, emarginate, clawed; wings obliquely oblong, adherent to the shorter oblong 

 curved keel. Stamens diadelphous (9 and I), or monadelphous below. Ovules oo ; 

 style very slender, with a tuft or ring of hairs at its summit. Pod flat, dehiscent, 

 2-valved, continuous between the seeds. [The classical Latin name of the Vetch.] 

 About 120 species of wide distribution. In addition to the following, about 12 

 others occur in southern and western N. Am. 



Flowers racemed or spicate ; peduncles elongated. 

 Indigenous perennials. 



Spike-like racemes dense, i-sided, is-4o-flowered. i. V, Cracca. 



Racemes loose, i-20-flowered. 

 Flowers 1.5-2 cm. long. 



Leaflets elliptic, or ovate-oblong. 2. V. Americana. 



Leaflets narrowly linear ; western. 3. V. linearis. 



Flowers 4-10 mm. long. 



Racemes 8-2o-flowered ; flowers 9-11 mm. long. 4. V. Caroliniana. 

 Racemes i-6-flowered ; flowers 4-9 mm. long. 



Leaflets 2-5 pairs, linear, or those of the lower leaves oval or 



obovate. 5. V. micrantha. 



Leaflets 4 or 5 pairs, all oval, elliptic or obovate. 



6. V. Ludoviciana. 

 Introduced annuals ; flowers few, 4-6 mm. long. 



Pod glabrous, 3-6-seeded. 7. V. tetrasperma. 



Pod pubescent, 2-seeded. 8. V. hirsuta. 



Flowers sessile or very nearly so, few, axillary. 

 Flowers i or 2 in the axils ; annuals. 



Leaflets oblong, oval or obovate. 9. V. sativa. 



Leaflets, except those of lower leaves, linear or linear-oblong. 



10. V. angustifolia. 

 Flowers 2-6 in a short nearly sessile raceme; perennial. n. V. Septum. 



1. Vicia Cracca L. TUFTED OR Cow VETCH. BLUE VETCH. (I. F. f. 

 2204.) Finely pubescent or sometimes glabrate; stems weak, 6-12 dm. long. 

 Stipules linear, acute, entire, 2-9 mm. long; leaves nearly sessile; leaflets 18-24, 

 thin, linear or linear-oblong, mucronate, 1.7-2 cm. long; peduncles axillary, shorter 

 than or equalling the leaves; racemes 2.5-10 cm. long; flowers bluish-purple, II- 



13 mm. long, reflexed; claw of the vexillum about equalling its blade; pod short- 

 stalked, glabrous, 1.8-2.5 cm - lon g> 5-8-seeded. In dry soil, Newf. to Br. Col., 

 N. J., Ky. and Kans. Also in Europe and Asia. June- Aug. 



Vicia vil!6sa R o th, a European species found by Dr. C. D. Fretz in eastern Penn- 

 sylvania, differs from the above in having the claw of the standard half the length of its 

 blade. 



2. Vicia Americana Muhl. AMERICAN VETCH. PEA VINE. (I. F. f. 2205.) 

 Glabrous, or with some appressed pubescence, 6-9 dm. long. Leaves nearly ses- 

 sile; stipules broad, foliaceous, triangular-ovate, sharply -toothed, 4-11 mm. long; 

 leaflets 8-14, elliptic, ovate or oblong, obtuse or sometimes emarginate and mucron- 

 uhte, rounded at the base, 1.7-3.8 cm. long; peduncles usually shorter than the 

 leaves; racemes 3~9-flowered; flowers bluish- purple, 17-21 mm. long, spreading; 

 pod short-stalked, glabrous, 2.5-3 cm. long. 4-7-seeded. In moist ground, N. B. 

 to Manitoba, Br. Col., Va., Ky. and Nev. May-Aug. 



Vicia Americana truncita (Nutt.) Brewer. Leaflets thick, oblong or obovate, trun- 

 cate and dentate at the apex. Kans. to S. Dak., Cal. and Br. Col. 



. Vicia linearis (Nutt.) Greene. NARROW- LEAVED AMERICAN VETCH. 

 2206.) Glabrous or nearly so; stems often zigzag, 3-6 dm. long. Leaf- 



(I. F.' f. 



