POLYPETALOUS EXOGENOUS PLANTS. 239 



* Peduncles shorter than the leaves; 1-2-flowered. 



V. SATIVA, L. ( Vetch or Tare.) Pubescent ; stem simple ; 

 leaflets 10-12, varying from obovate-oblong to linear, emar- 

 ginate; floivers by pairs, nearly sessile, pale purple; legume 

 linear; several-seeded, annual ; corolla ^ long) stem 1° -2° 

 long. 



V. MiCRANTHA, Nutt. SmootL ; leaflets 4-6, linear, ob- 

 tuse or barely acute ; peduncles 1-2-flowered ; floiuers mi- 

 nute, pale blue; legume sabre-shaped, 4-10-seeded; stem 

 2°-3° long; seeds black, annual. 



V. Caroliniana, Walt. Smoothish ; leaflets 8-12, linear 

 or linear-oblong, obtuse or barely acute ; stipules small, jye- 

 duncles many-flowered; calyx-teeth, shorter than the tube; 

 flotvers nearly white, the keel tipped with blue ; legume ob- 

 long, several-seeded, perennial ; stems 3°-4° long, branch- 

 ing; flotuers 4"-6" long. 



V. LuDOViciANA. Stem 2°-3° long, rather stout, 

 strongly angled, climbing ; leaflets 6-8' long, 2' wide, com- 

 monly emarginate; stijmles very small ; floiuers blue, often 

 2 or 6 on a peduncle ; calyx hairy ; heel marked with a 

 deep-blue spot at the summit ; legumes |-° long and 3' wide. 

 (Gray and Torrey. ) — Dr. Leavenworth. 



V. MICRANTHA. Stem slender, 2°-3° long, annual; 

 leaflets V long, in the lower leaves truncate and often 

 toothed at summit ; floivers small, pale blue, the peduncles 

 \t\\e length of the leaves; style short; legumes!' long, 

 slightly pubescent; seeds blackish, compressed; the hihwi 

 extending | of its circumference. — Dr. Leavenworth. 



LATHYRUS, L. 



Style flattened, bearded on the side facing the vexillum; 

 otherwise as in Vicia. 



