FABACEAE 655 



or obovate, 4-10 cm. long, rounded or broadly cuneate at the base : racemes surpassing the 

 subtending leaves : peduncles often longer than the racemes : pedicels spur-like : calyx 

 helmet-like, 14-17 mm. long, constricted at the base: corolla pink : pods broadly linear, 

 10-12 cm. long : seeds oblong, brown. 



On sandy shores, southern Florida and Texas. Also in tropical America. 



2. Canavalia gladiata (Savi) DC. Foliage glabrous, or finely pubescent when young. 

 Stems climbing, 1-14 m. long, branching : leaflets 3, the blades membranous, ovate, oval 

 or oblong-ovate, 5-10 cm. long, usually abruptly pointed, undulate : racemes axillary, sur- 

 passing the subtending leaves : pedicels 2-5 mm. long : calyx 10-12 mm. long : corolla 

 white or tinged with purple or yellow : pods linear-oblong, somewhat curved, 10-25 cm. 

 long, acute : seeds oblong, brown or reddish, or rarely white. 



In thickets or woods, southern Florida, and introduced in Oklahoma. Also throughout the tropics. 



54. VICIA L. 



Trailing or climbing herbs, with tendrils terminating the leaves. Stems terete or 

 angled. Leaves alternate : blades equally pinnate : leaflets few or many, the blades 

 entire or toothed at the apex. Flowers perfect, in sessile or long-peduncled racemes, or 

 rarely solitary in the axils. Calyx often oblique, the upper lobes usually shorter than the 

 lower. Corolla white, blue, violet or yellow : standard broad ; blade emarginate : wings 

 oblique, cohering to the middle of the shorter keel. Stamens diadelphous, or monadel- 

 phous below. Anthers alike. Style filiform, pubescent at the apex or on the side opposite 

 keel, inflexed. Ovules numerous or rarely 2. Pod short or elongated, flattened, 2-valved. 

 Seeds usually subglobose. VETCH. PEA VINE. 



Peduncles manifest, sometimes surpassing the leaves. 

 Annuals, except V. Cracca: species naturalized. 



Leaflets 6-12 : pods pubescent : seeds 2. 1. V. hirsuta. 



Leaflets 12-24 : pods glabrous : seeds 3-8. 



Leaflets 12-14 : corolla 5-6 mm. long : pods obtuse. 2. V. tetrasperma. 



Leaflets 18-24 : corolla 10-12 mm. long : pods acute. 3. V. Cracca. 



Perennials, or rarely annuals : species native. 

 Racemes 8-20-flowered. 



Leaflets with blades of an oblong type. 4. V. Caroliniana. 



Leaflets with blades of a linear type. 



Corolla 5-6 mm. long: calyx 1.5 mm. long: pods less than 2.5 cm. long. 5. V. Hugeri. 

 Corolla 7-8 mm. long : calyx 2 mm. long : pods over 2.5 cm. long. 6. V. acutifolia. 



Racemes 1-6-flowered. 



Pods pubescent. 7. V. Revcrchonii. 



Pods glabrous. 



Peduncles longer than the leaflets. 



Leaflets 4-6. 8. V. Floridana. 



Leaflets 8-12. 



Leaflets about 5 times as long as broad. 9. V. Texana. 



Leaflets less than 3 times as long as broad. 



Stems pubescent : calyx-lobes longer than the tube. 10. V. Leavenworthii. 



Stems glabrous : calyx-lobes shorter than the tube. 11. V. Liidoviciana. 



Peduncles shorter than the leaflets. 12. V. micrantha. 



Peduncles wanting : calyx nearly sessile or short-pedicelled. 



Corolla over 1.5 cm. long : leaflets of the upper leaves inclined to be oblong. 13. V. saliva. 

 Corolla less than 1.5 cm. long : leaflets of the upper leaves inclined to be linear. 14. V. angnstijolia. 



1. Vicia hirsuta (L. ) Koch. Annual, glabrate or sparingly pubescent. Stems 

 usually branched at the base, the branches spreading or climbing, 3-7 dm. long : leaves 

 2-6 cm. long ; rachis terminating in a slender, usually forking tendril ; leaflets 6-12, the 

 blades linear or oblong, 6-15 mm. long, truncate or notched at the apex, mucronulate : 

 peduncles mostly shorter than the subtending leaves : pedicels 1-2 mm. long : calyx 

 minutely pubescent ; lobes subulate, about as long as the turbinate tube : corolla whitish 

 or purplish blue ; keel-petals 2-3 mm. long : pods oblong, 6-8 mm. long, short-beaked, 

 oblique at both ends, pubescent, 2-seeded. 



In waste places, New Brunswick to Ohio, Virginia and Georgia. Native of Europe. Spring to fall. 



2. Viola tetrasperma (L.) Moench. Annual, glabrous or minutely pubescent. 

 Stems ascending or reclining, 2-7 dm. long, slender, more or less branched : leaves 2-6 

 cm. long ; rachis terminating in a simple or forking tendril ; leaflets 12-14, the blades 

 linear or linear-oblong, 8-20 mm. long, acute or mucronate, short-stalked : peduncles fili- 

 form, 2-4 cm. long, 1-4-flowered : pedicels 1.5-2 mm. long, curved: calyx strigillose, 

 about 2 mm. long when young ; tube angled ; lobes lanceolate, the longer as long as the 

 tube : corolla usually pale blue ; keel-petals 5 mm. long : pods oblong, 9-12 mm. long, 

 glabrous : seeds 2 mm. broad, granular. 



In waste places, Nova Scotia and Ontario to North Carolina. Native of Europe. Spring to fall. 



