GENUS 41. 



PEA FAMILY 



6. Lathyrus ornatus Nutt. Showy 



Vetchling. Fig. 2629. 

 L ornatus Nutt. ; T. & G FL N. A. i : 277. 1838. 



Closely resembling the preceding species, but 

 generally lower, often less than i high, gla- 

 brous or nearly so. Stipules lanceolate or 

 linear, 2"-io" long ; leaflets narrow, linear or 

 linear-oblong, acute and mucronate, 4"-i2" 

 long, I "-2" wide; tendrils commonly wanting; 

 flowers purple, showy, I'-ii' long; pod linear, 

 stipitate ; seeds with a broad stalk and long 

 hilum. 



Prairies and plains, Oklahoma to Kansas and 

 South Dakota, west to Colorado, Wyoming and 

 Utah. May-June. 



Lathyrus incanus (Rydb. & Smith) Rydb. 

 differs in being villous-pubescent. It ranges from 

 western Nebraska to Utah and Wyoming. 



7. Lathyrus ochroleucus Hook. Cream- 

 colored or Pale Vetchling. Fig. 265^. 



Lathyrus ochroleucus Hook. Fl. Bor. Am. i : 159. 



1833- 

 Lathyrus glaucifolius Beck, Bot. 90. 1833. 



Perennial, slender, glabrous and slightly 

 glaucous ; stem somewhat angled, climbing or 

 trailing, i-2i long; stipules broad, folia- 

 ceous, half-ovate and half-cordate, 8"-i2" 

 long; leaves petioled; leaflets 3-5 pairs, thin, 

 pale beneath, ovate or broadly oval, acute or 

 acutish at the apex, rounded at the base, i'-2 f 

 long; tendrils branched; peduncles shorter 

 than the leaves ; flowers 5-10 yellowish white, 

 7"-p" long; pod oblong-linear, sessile, gla- 

 brous, i '-2' long. 



On river-banks and hillsides, Quebec to Mack- 

 enzie, British Columbia, New Jersey, Illinois, 

 Iowa, South Dakota and Wyoming. May-July. 



8. Lathyrus pratensis L. Meadow Pea. 

 Yellow Vetchling. Fig. 2631. 



Lathyrus pratensis L. Sp. PI. 733. 1753. 



Perennial, weak, slender, glabrous or spar- 

 ingly pubescent, climbing or straggling, i-3 

 long. Stems angled, branching; stipules lan- 

 olate, foliaceous, half-sagittate, acuminate, 6"- 

 12" long, nearly as large as the leaflets; leaves 

 sessile; leaflets a single pair, oblong or linear- 

 oblong, acute or acutish, mucronulate, i'-ii' 

 long, 2"-4" wide ; tendrils simple or branched ; 

 racemes exceeding the leaves ; flowers 4~ I2 

 yellow, 6"-io" long; pods linear, glabrous, 

 i'-ii' long. 



In waste places, New Brunswick, New York, 

 Massachusetts and Ontario. Also throughout Eu- 

 rope and in Russian Asia. Angleberries. Craw- 

 peas. Mouse-pea. Tom Thumb. Yellow tar-fitch 

 [tare vetch]. Lady's-fingers. June-Aug. 



