EVENING-PRIMROSE FAMILY 589 



apiculate; coma white or dingy. E. glaberrimum latifolium Barbey. Wet 

 places: B.C. — Utah — CaUf. Submont. — Mont. Jl-Au. 



24. E. wyomingense A. Nels. Stem slender, erect, branched, glabrous 

 below, minutely puberulent above; leaves thin, 3-5 cm. long; midrib evident, 

 but lateral veins obscure; petals 3-4 mm. long; capsules 4-7 cm. long, minutely 

 cinereous; seeds fusiform, scarcely beaked; coma white. E. palustre albiflorwm 

 Lehm. In bogs and along streams: Sask. — S.D. — Colo. — Utah — Yukon. 

 Plain — Submont. Jl-Au. 



25. E. lineare Muhl. Stem erect, branched, 2-4 dm. high; leaves linear, 

 short-pubescent, with crisp hairs, revolute on the margins, 2-5 cm. long; flowers 

 numerous; petals about 4 mm. long; capsule 4-5 cm. long, canescent, often slen- 

 der-pedicelled; seeds fusiform, short-apiculate; coma dingy. Swamps: N.B. — 

 Del.— Colo.— Ida.— B.C. Plain— Submont. Jl-S. 



26. E. davuricum Fischer. Stem 1-2 dm. high, sparingly crisp-hairy; 

 leaves 5-15 mm. long, crowded at the base, distant above, linear or narrowly 

 oblong, obtuse, remotely denticulate, sessile; flowers at first nodding; capsule 

 erect, 4 cm. long, on slender pedicels; coma white. Bogs: Alaska — B.C.; e 

 Siberia. Subalp. 



27. E. minutum Lindl. Stem 1-3 dm. high, without decurrent lines, branched ; 

 leaves mostly opposite, short-petioled, rather fleshy, more or less strigose; flowers 

 numerous, 3-4 mm. long; petals white or rose-colored; capsules clavate, tortuose, 

 1-2 cm. long; seeds rounded at the apex. Crossostigma Lindleyi Spach. E. 

 adscendens Suksdorf. Hills and rocky places: Athabasca — Nev. — Calif. — B.C. 

 Submont. Ap-Jl. 



28. E. Tracyi Rydb. Stem 3-8 dm. high, perfectly glabrous, straw-colored; 

 leaves 2-4 cm. long, linear, entire, glabrous; tube of the hypanthium 1-1.5 mm. 

 long; calyx-lobes about 2 mm. long, very acute; capsule more or less clavate, 

 about 1.5 cm. long; seeds obovoid, 1.5 mm. long. Sandy soil: B.C. — Ore. — 

 Utah— Mont. So?i. 



29. E. subulatum (Haussk.) Rydb. Stem slender, 3-6 dm. high, much- 

 branched, brownish, glabrous; leaves linear or linear-subulate, 2-3 cm. long; 

 tube of hyj)anthium about 2 mm. long; calyx-lobes 2-2.5 mm. long; petals 3.5-5 

 mm. long, rose; capsule about 2 cm. long; seeds brown, 1.5 mm. long, obovate; 

 coma tawny. E. paniculatum subulatum Haussk. Sandy soil: B.C. — Ida. — 

 Utah — Cahf. Son. — Plain. Jl-Au. 



30. E. paniculatum Nutt. Stem branched, 4-8 dm. high, glabrous, straw- 

 colored; leaves linear or linear-lanceolate, 3-5 cm. long; pedicels longer than the 

 bracts; tube of hypanthiiun 2-3 mm. long; calyx-lobes about as long; petals 

 lilac or rose-colored, 5-7 mm. long; pods clavate, about 2 cm. long; seeds brown, 

 2 mm. long; coma tawny. Sandy soil: Alta. — Colo. — Calif. — B.C. Plain — 

 Mont. Jl-Au. 



31. E. adenocladon (Haussk.) Rydb. Stem rigid, 4-8 dm. high, glabrous, 

 and straw-colored below, the smaller branches and pedicels densely glandular; 

 leaves linear or linear-lanceolate, mostly entire, 2-4 cm. long; tube of the hypan- 

 thium about 3 mm. (rarely 4 mm.) long; calyx-lobes 2-3 mm. long; petals purple 

 or rose, 5-7 mm. long; capsule clavate, 1.5-2.5 cm. long; seeds blackish brown, 

 obovoid, 2 mm. long; coma tawny. E. paniculatum adenocladon Haussk. 

 Sandy soil: S.D. — Colo. — Utah — Mont. Plain — Submont. 



32. E. laevicaule Rydb. Stem glabrous, 6-10 dm. high, glabrous and 

 shining; leaves linear or Unear-lanceolate, 3-6 cm. long, the upper mostly in- 

 volute; calyx-lobes 3-4 mm. long; petals rose-colored; pods clavate, about 3 cm. 

 long, glabrous or almost so; seeds obovoid, dark; coma dingy. Sandy valleys: 

 Ida.— Mont.— Wash. Plain. Jl-Au. 



33. E. Hammondii Howell. Stem 6-10 dm. high, glabrous, with shreddy 

 bark, paniculate-branched; leaves linear, 2-5 cm. long, the upper involute, pale 

 green, entire; calyx-lobes about 5 mm. long; petals rose or purphsh; capsule 

 somewhat clavate, 3-4 cm. long. Rocky places: Ore. — Ida. Au-S. 



