ROSACES. (ROSE FAMILY.) 49 



cles 4-8-flowered; flowers purplish, 6 to 9 lines long; style very villous at the top; pods 

 an inch long or more, 3-6-seeded. 



Var. truncata, Brewer. Somewhat pubescent; leaflets truncate and often 3-5- toothed 

 at the apex. 



Var. linearis, Watson. Leaves all linear. Only the varieties are likely to be found. 



* * Slender annuals; flowers mostly solitary. 



3. V. exigua, Nutt. A span to two feet high, somewhat pubescent; leaflets about 

 4 pairs, linear, acute, a half to an inch long; peduncles usually short, rarely 2-flowered; 

 flowers 3 lines long, purplish; pod about 6-seeded. 



4. V. sativa, L. Rather stout, somewhat pubescent; leaflets 5 or 6 pairs, obovate- 

 oblong to linear, retuse, long-mucronate; flowers nearly sessile, an inch long, violet- 

 purple. The common tare of Europe. Introduced. 



12. LATHYRUS, L. 



Style dorsally flattened toward the top, and usually twisted, hairy on the inner side. 

 Peduncles usually equaling or exceeding the leaves and several flowered. 



* Rachis of the leaves tendril bearing; pod sessile; racemes several flowered. 



1. L. venosus, MuhL, var. Californicus, Watson. Very stout, several feet high; 

 stems often strongly winged; leaflets oblong-ovate, acute; flowers nearly or quite an inch 

 long, purple; pod about 2 inches long. 



2. L. vestitus, Nutt. Slender, a foot to 6 or 10 feet high; stems not winged; 

 Btipules narrow, often small; flowers pale rose-color or violet, usually 7 to 10 lines long; 

 ovary pubescent. 



3. L. palustris, L. Slender, a foot or two high; stem often winged; leaflets nar- 

 rowly oblong to linear, acute, an inch or two long; flowers purplish, half an inch long. 



Var. myrtifolius, Gr. Stipules broader; leaflets ovate to oblong, shorter. 



* Rachis of the leaves not tendril bearing, or rarely so; pod shortly stipulate, peduncles 



long; 2-6-flowered. 



4. L. littoralis, Endl. Densely silky-villous throughout; stems numerous, from 

 creeping root-stocks, stout, decumbent or ascending, to 2 ft. high; leaflets 1 to 3 pairs, 

 with a small linear or oblong terminal one; calyx teeth nearly equal; standard bright 

 purple, 6 to 8 lines long, exceeding the paler wings and keel; pod villous, an inch long. 



ORDER 21. ROSACES. 



Herbs, shrubs or trees, with alternate leaves, usually evident stipules, mostly numer- 

 ous stamens borne on the calyx; distinct free pistils from one to many, or in one sub- 



