228 



In dry soil, Northwest Territory to British Columbia, 

 Kansas, New Mexico and California. May— Aug. 



Lathyrus ornatus Nutt. vonden we in Aug. 1922 

 adventief te Amsterdam. Aan Britton and Brown ont- 

 leenen we weer de volgende determinatiekenmerken en 

 beschrijving. Met onze flora's komt men in de buurt van 

 Lath. paluster en L. pratensis. 



Leaflets 3-6 pairs, flowers purple. 



Stipules, half sagittate or small, or wanting. 



Plants mainly erect; stipules often wanting, pod 

 stipitate. 



Leaflets lanceolate or oblong. L. decaphyllus. 

 Leaflets linear. L. ornatus, 



Lathyrus decaphyllus Pursh. 



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



L. polymorphus Nutt. Gen. 2, 96. 1818. 



Perennial, erect or ascending, glabrous, or finely pubes- 

 cent, 6^ — ^18' high. Stems angled; stipules half-sagittate, 

 acuminate, 4''— 12'' long, T'— 3'' wide; leaves petioied; 

 leaflets 3 — 7 pairs, obtuse or acute and mucronulate at the 

 apex, narrowed at the base, thick, conspicuously reticu- 

 lated, V^2^// long, 3''— 8'' wide; stipules when present, 

 branched, but often wanting ; peduncles usually shorter 

 than the leaves; flowers purple, 1'— IV2' long, showy; 

 pod linear, stipitate; seeds with a narrow stalk and 

 short hilum. 



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

 Mexico. March— July. 



Lathyrus ornatus Nutt. 



Lathyrus ornatus Nutt.; T. 6 G. Fl. N. A. 1 : 277. 1838. 



Closely resembling the preceding species, but generally 

 lower, often less than 1° high. Stipules lanceolate or linear, 

 2^' — 10'' long ; leaflets narrow, linear or linear-oblong, acute 

 and mucronate, 4"- — 12" long, 1"— 2" wide; tendriis com- 

 monly wanting; flowers purple, showy, 1'— IV2' long; 



