LEGUMINOSAE. 225 



Lathyrus coriaceus White. Perennial, glabrous, pale green; stems 10-30 

 cm. high, terete; stipules semi-sagittate, acuminate, not more than half as 

 long as the leaflets; leaflets 6-12, elliptical, obtuse, firm, 3-6 cm. long; raceme 

 shorter than its leaf, 3-10-flowered; calyx-teeth subequal, acute, shorter than 

 the tube; corolla violet-purple. 



Seattle, O. A. Piper. A characteristic species of the sagebrush region, 

 whose occurrence at Seattle is remarkable. 



Lathyrus sulphureus Brewer. Glabrous, glaucescent; stems short, angled, 

 60-120 cm. high, erect or ascending; leaflets 3-5 pairs, ovate to oblong, acutish, 

 2-4 cm. long; stipules broad, somewhat dentate; peduncles 6-15-flowered, 

 about as long as the leaves; calyx-teeth very unequal, the lower ones largest; 

 corolla at first pinkish-yellow, quickly fading to ochraceous; pods glabrous. 



In open coniferous woods, not rare. In contrast to L. polyphyllus which 

 grows in similar locations this fruits abundantly. The flowers are never 

 " sulphur- yellow." 



Lathyrus polyphyllus Nutt. Glabrous; stems stout, angled, erect or nearly 

 so, 60-100 cm. high; tendrils small; leaflets 5-8 pairs, thin, oblong to ovate, 

 obtuse, paler beneath, 2-5 cm. long; stipules broad, nearly as large as the 

 leaflets, more or less dentate; peduncles 6 10-flowered, shorter than the leaves; 

 calyx-teeth ciliate, the two upper triangular and shorter than the subulate 

 lower ones; corolla purple, 12-15 mm. long; pods glabrous. 



Very abundant in open coniferous woods. Few of the pods develop to 

 maturity. 



Lathyrus maritimus (L.) Bigel. Beach Pea. Pale and usually glabrous; 

 stems short, 30-90 cm. long, decumbent; leaflets 3-5 pairs, thick, oblong to 

 ovate, mostly obtuse, 2-5 cm. long; stipules ovate, nearly as large as the 

 adjacent leaflets, acute, the lower lobe often dentate; peduncles 6-10-flowered; 

 calyx-teeth unequal, the upper two triangular, the others broadly subulate; 

 corolla purple, 2-2.5 cm. long; pods 4-5 cm. long, nearly glabrous. 



Common on seabeaches, the green seeds sometimes eaten like green peas. 



296. HEDYSARUM. 



Perennial herbs with odd-pinnate leaves; calyx 5-cleft, the 

 lobes awl-shaped and nearly equal; keel nearly straight, obliquely 

 truncate, not appendaged, longer than the wings; stamens 

 diadelphous, 9 and 1; pod a loment, flattened, composed of 

 several symmetrical separable roundish joints connected in the 

 middle. 



Hedysarum occidentale Greene. Glabrous; stems 30-60 cm. high; leaflets 

 13-21, oblong or lanceolate; stipules scaly; flowers purple, deflexed. 



Abundant in the Olympic Mountains. Scarcely different from the eastern 

 H. americanum (Michx.) Britt. 



297. HOSACKIA. 



Herbs or shrubs; leaves pinnate, 1 many-foliolate; stipules 

 minute and gland-like or spine-like; flowers yellow or reddish, soli- 

 tary or in umbels ; calyx- teeth nearly equal ; petals free from the 

 diadelphous stamens; standard ovate or roundish; pod linear, 

 compressed or somewhat terete, sessile, several-seeded. 

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