ROSACEA. (rose riJULT.) 49 



cles 4-S-flowere(i; flowers purplish, 6 to 9 lines long; style very villous at the top; pods 

 an incli long or more, 3-C-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. eisigua, 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 hearing; pod sessile; racemes several flowered. 



1. L. venosus, MuhL, var. Califomicus, 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. Ii. vestltus, Nutt. Slender, =<• foot to 6 or 10 feet high; stems not winged^ 

 stipules 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 sliortly stipulate, peduncles 



long; Z-6-flowered. 



4. Ii. littoralis, EndL Densely silky- villous throughout; stems numerous, from 

 creeping root-stocks, stout, decumbent or ascending, J 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. ROSACE.^. 



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 



