PEA FAMILY 623 



dm. long-. Leaflets 2-3 pairs, linear-lanceolate to oblong, 2-3 cm. long, 3-7 mm. wide, acute or 

 obtuse, mucronate; stipules semisagittate, linear-lanceolate to ovate-lanceolate, 10-15 mm. long; 

 tendrils simple or commonly forked ; peduncles about as long as the leaves, 2-6-flowered ; lower 

 calyx-teeth about equaling the tube; corolla purple, 10-14 mm. long; pod glabrous, 3.5-5 cm. 

 long, 6 mm. wide. 



Moist or wet ground, mainly Boreal Zones; Alaska to northwestern California, along the coast; also along 

 the northern Atlantic coast, and in Eurasia. Type locality: northern Europe. June-Aug. 



13. Lathyrus Watsonii White. Watson's or Buff Pea. Fig. 2948. 



Lathyrus vcnosus var. californicus S. Wats. Proc. Amer. Acad. 11 : 133. 1876. 

 Lathyrus californicus S. Wats. Proc. Amer. Acad. 20: 363. 1885. Not Dougl. 1828. 

 Lathyrus Watsonii White, Bull. Torrey Club 21: 447. 1894. 



Perennial, rather minutely tomentose, the stems stout, 1-2 m. high, frequently branching, 

 prominently winged on two of the angles. Leaflets ovate to linear-lanceolate, 1-5 cm. long, ob- 

 tuse or acute, prominently veined, and rather firm ; stipules not half the length of the leaflets, 

 commonly toothed at the base, but sometimes narrower and entire ; peduncles equaling or exceed- 

 ing the leaves, 6-15-flowered ; calyx tomentose, sometimes sparsely so, the lower teeth longer than 

 the tube ; corolla 18-20 mm. long, white, with rose-purple veins ; pods 4-7 cm. long, 7-8 mm. 

 wide, veiny, glabrous. 



Usually along watercourses, Upper Sonoran and Transition Zones; California, Shasta County to Monterey 

 and Madera Counties. Type locality : Sonoma County. April-June. 



14. Lathyrus Jepsonii Greene. Jepson's or Tule Pea. Fig. 2949. 



Lathyrus Jepsonii Greene, Pittonia 2: 158. 1890. 



Perennial, glabrous or nearly so, the stems stout, 15-30 dm. high, prominently winged on two 

 of the angles. Leaflets 8-12, linear-lanceolate, 3-5 cm. long, acute, prominently veined and coria- 

 ceous ; tendrils stout, well-developed and divided ; stipules semisagittate, entire or toothed toward 

 the base, usually less than half the length of the leaflets; peduncles stout, about equaling the 

 leaves, 6-15-flowered; calyx glabrous or puberulent, the lower teeth equaling the tube; corolla 

 18-20 mm. long, rose-purple; pod 6-7 cm. long, 1 cm. wide, glabrous, 12-16-seeded. 



Low marsh lands, Upper Sonoran Zone; Suisun marshes and the delta islands on the lower Sacramento and 

 San Joaquin rivers, California. Type locality: Suisun marshes. May-June. 



15. Lathyrus sulphureus Brewer. Brewer's or Snub Pea. Fig. 2950. 



Lathyrus sulphureus Brewer ex A. Gray, Proc. Amer. Acad. 7: 399. 1867. 



Lathyrus ochropetalus subsp. holochlorus Piper, Proc. Biol. Soc. Wash. 31: 190. 1918. 



Perennial, glabrous or nearly so. the stems sharply angled or inconspicuously winged, rather 

 slender, 5—10 dm. long. Leaflets 6-12, ovate to ovate-lanceolate, acute, light green on both sur- 

 faces, coriaceous ; tendrils well-developed ; stipules broad, half as long as the leaflets ; peduncles 

 usually shorter than the leaves, 6-20-flowered ; calyx glabrous, the lower teeth longer than the 

 tube, the upper two very short, triangular ; corolla 10-12 mm. long, cream-white turning yellow- 

 ish brown, the standard with rose-colored veins ; pods 6 cm. long, glabrous, 6-7-seeded. 



Open places on hillsides. Transition Zones; western Washington to the North Coast Ranees and the southern 

 Sierra Nevada, California. Type locality: "In woods along foothills of the Sierra Nevada," California. April-June. 



Lathyrus sulphureus var. argillaceus Jepson, Fl. Calif. 2: 393. 1936. Herbage distinctly strigose; 

 corolla 14-15 mm. long; otherwise much as in the typical species. Tehama and Shasta Counties, California. 

 Type locality: Rosewood, Tehama County. 



16. Lathyrus maritimus (L.) Bigelow. Beach or Sand Pea. Fig. 2951. 



Pisum maritimum L. Sp. PI. 727. 1753. 



Lathyrus maritimus Bigelow, Fl. Bost. ed. 2. 268. 1824. 



Lathyrus californicus Dougl. ex Lindl. Bot. Reg. 14: pi. 1144. 1828. 



Lathyrus pisiformis Hook. Fl. Bor. Amer. 1: 158. 1834. 



Perennial, glabrous or very sparingly pubescent, slightly glaucous, the stems stout,, decumbent, 

 25-90 cm. long, angled. Leaflets 8-12, oblong to ovate, acute or obtuse, 1-5 cm. long, rather 

 fleshy; tendrils mostly simple; stipules often nearly as large as the adjacent leaflets, peduncle 

 about equaling the leaves, 6-10-flowered; calyx-teeth unequal, the upper as long as the tube, the 

 three lower longer than the tube ;_ corolla purple, or the keel and wing petals partly white, 20-25 

 mm. long ; pod 4-5 cm. long, sparingly pubescent, 6-8-seeded. 



Beach and dune sands along the coast, Boreal Zones; Alaska to Humboldt County, California; also north- 

 eastern North America, Europe, and Asia. Type locality: northern Europe. May-July. The American plants 

 are considered by some as L. maritimus var. glaber (Ser.) Eames, Rhodora 11 : 95. 1909. 



17. Lathyrus polyphyllus Nutt. Many-leaved or Oregon Pea. Fig. 2952. 



Lathyrus polyphyllus Nutt. in Torr. & Gray, Fl. N. Amer. 1 : 274. 1838. 



Perennial, glabrous, the_ stems stout, angled, erect and climbing, 7-10 dm. high. Leaflets 10- 

 20, petiolulate, oblong-elliptic to ovate, 2-5 cm. long, obtuse, rather thin, paler beneath ; tendrils 

 small, branched ; stipules broad, nearly as large as the leaflets, more or less dentate ; peduncles 

 shorter than the leaves, 5-10-flowered ; calyx-teeth ciliate on the margins, the lower subulate, 

 shorter than the tube; corolla purple, 15-18 mm. long; pods 4-6 cm. long, 6-7 mm. wide. 



Coniferous forests, Humid Transition Zone; British Columbia south along the Pacific slope to the North 

 Coast Ranges, California. Type locality : "Forests of the Oregon toward the sea." May-June. 



