4'4 



FABACEAE. 



VUL. 11. 



3. Lathyrus palustris L. ]\Iarsh Wichling. Wild 

 Tea. Fig. 2b2b. 



Lathyrus pahtslris L. Sp. I'l. 733. 1753. 



L. Caluslris linearifolius Ser in DC. I'rodr. 2: 371. 1825. 



Perennial, glabrous or .somewhat pubescent; stems an- 

 gled and usually winged, slender, i-3 long; stipules half- 

 sagittate, lanceolate, Hnear or ovate-lanceolate, 5"-io" long, 

 li"-2i" wide; leatlets 2-4 pairs, lanceolate, oblong, linear 

 or linear-oblong, acute or obtusish and niucronate at the 

 apex, narrowed or rounded at the base, i'-2j' long, 2"-5" 

 wide ; tendrils branched ; peduncles generally about equal- 

 ling the leaves, 2-8-flowered; tlowers purple, 5"-/" long; 

 pod linear, sessile, slightly pubescent, or glabrous, lj'-2i' 

 long, about 3" wide. 



In moist or wet grounds. Newfoundland to Alaska, Massa- 

 chusetts. Xew York, South Dakota and British Columbia. Also 

 in Europe and Asia. May-Aug. 



4/ Lathyrus myrtifolius ]\Juhl. Myrtle-leaved 

 Marsh Pea. Fig. 2627. 



Lathyrus myrtifolius Muhl. ; Willd. Sp. PI. 3: 1091. 1803. 

 L. palustris var. myrtifolius A. C7ray. Man. Ed. 2. 104. 1856. 

 L. myrtifolius macranthus White, Bull Torr. Club 21 ; 448. 1894. 



Perennial, usually quite glabrous sometimes 

 pubescent; stems slender, angled, not winged, 

 i-3 long, weak. Stipules obliquely ovate, or 

 half-sagittate, 6"-i2" long, often 4"-6" wide 

 and toothed ; leaflets 2-4 pairs, mostly 3 pairs, 

 oval, oval-oblong or ovate, mucronate and 

 acute or obtuse at the apex, narrowed at the 

 base, 9"-2' long, ^"-7" wide, rather thin; ten- 

 drils branched , peduncles equalling the leaves, 

 or shorter, 3-9-flowered ; flowers purple or pur- 

 plish, similar to those of the preceding species; 

 pod linear, glabrous, sessile, i'-2' long, 3*" 

 wide or less. 



In moist or wet grounds, New Brunswick to 

 Manitoba, south to North Carolina and Tennessee. 

 May-July. 



5. Lath3rrus decaphyllus Pursh. 



Prairie \'etcliling. 



Fig. 2628. 



Kansas ( ?). Idaho and Colorado to Arizona and New Mexico, 



L. decaphyllus Pursh, Fl. Am. Sept. 471. 1814. 

 Lathyrus polymorphus Nutt. Gen. 2; 96. 1818. 



Perennial, erect or ascending, glabrous, 

 or linely pubescent, 6'-i8' high. Stems 

 angled ; stipules half-sagittate, acuminate, 

 4"-i2" long, i"-3" wide; leaves petioled ; 

 leaflets ^-y pairs, obtuse or acute and nni- 

 cronulate at the apex, narrowed at the 

 base, thick, conspicuously reticulated. l'-2J' 

 long, 3"-8" wide ; stipules when present 

 branched, but often wanting; peduncles 

 usually shorter than the leaves ; flowers 

 purple, l'-\ long, showy; pod linear, stipi- 

 tate ; seeds with a narrow stalk and short 

 hilum. 



March-July. Everlasting-pea. 



