EVENING-PRIMROSE FAMILY 587 



more or less pubescent; petals pink or light purple, rarely white, about 5 mm. 

 long; pod 4-6 cm. long; seeds papillose, without a beak; coma white or in age 

 somewhat tawny. Wet meadows: Utah Colo. Mont. Ida. Submont. Jl-S. 



4. E. glandulosum Lehm. Stem 3-9 dm. high, somewhat angled, glabrous 

 below, crisp-pubescent and glandular above; leaves ovate, 5-12 cm. long, acute 

 or acuminate, sessile, darkening in drying; petals 5-7 mm. long, purple; capsule 

 about 6 cm. long, more or less pubescent; coma dingy. E. Treleaseanum Lev., 

 a large-flowered form. Wet places, usually in edges of woods: Sask. Wyo. 

 Alaska. Submont. Mont. Jl-Au. 



5. E. ovatifolium Rydb. Stem 2-6 dm. high, glabrous except the crisp- 

 hairy decurrent lines; leaves sessile or nearly so, ovate or ovate-lanceolate and 

 acute, or the lowest oval and obtuse, 3-4 cm. long, glabrous; petals purple or 

 rarely rose, 5-7 mm. long; capsule 5-6 cm. long, crisp-hairy; coma white. Wet 

 places in the mountains: Colo. Utah N.M. Mont. Alp. Je-Au. 



6. E. brevistylum Barbey. Stem 2-6 dm. high, glabrous below, crisp- 

 pubescent above; leaves 3-6 cm. long, ovate or elliptic-lanceolate, drying pale, 

 sessile; petals pink or purple, about 5 mm. long; capsules 4-6 cm. long, short- 

 pedicelled, almost glabrous; coma dingy. Springs and along brooks: Mont. 

 Colo. Calif. Wash. Submont. Mont. Je-Au. 



7. E. occidentale (Trelease) Rydb. Stem 3-10 dm. high, somewhat angled, 

 glabrous below, crisp and glandular-pubescent above; lower leaves short-petioled, 

 the upper subsessile; blades ovate to triangular-lanceolate, 3-7 cm. long; petals 

 purple or rose, 5-6 mm. long; capsule 4-6 cm. long, more or less pubescent; 

 seeds beakless; coma white. E. adenocaulon occidentale Trelease. Wet places: 

 Alta. S.D. Colo. Calif. B.C. Submont. Mont. Jl-Au. 



8. E. americanum Haussk. Stem 3-6 dm. high, slightly angled, glabrous 

 below, slightly crisp-hairy above; leaves short-petioled, 2-4 cm. long, glabrous 

 and pale, denticulate or subentire; petals about 4 mm. long, white; capsules 

 glabrous or sparingly pilose when young, 3-5 cm. long; coma white. E. adeno- 

 caulon perplexans Rydb., scarcely Trelease. Wet places: Sask. N.D. Wyo. 

 Ida. B.C. Je-Au. 



9. E. adenocaulon Haussk. Stem erect, 3-10 dm. long, somewhat angled, 

 glabrous below, crisp and glandular in the inflorescence; leaves glabrous or the 

 upper puberulent, ovate-lanceolate or elliptic-lanceolate, 3-6 cm. long; petals 

 about 4 mm. long; capsules 4-5 cm. long, glabrate in age; coma white or nearly 

 so. Wet places: N.B. Pa. Colo. Nev. Yukon. Plain Mont. Je-Au. 



10. E. latiusculum Rydb. Stem 2-4 dm. high, more or less tinged with 

 purple, glabrous or with pubescent lines below, more or less crisp-hairy above; 

 leaves ovate-lanceolate, 2-4 cm. long, acute at the apex, rounded at the base, 

 glabrous; petals pink or rose-colored, about 4 mm. long; capsules 4-5 cm. long, 

 minutely glandular-puberulent, soon glabrate; seeds obtuse at each end, with a 

 very short apiculation; coma sparse, tawny. E. Drummondii latiusculum Rydb. 

 Wet places: B.C. Ida. Wyo. Submont. Subalp. Jl-Au. 



11. E. MacDougalii Rydb. Perennial, with fleshy rosettes; stem 3-5 dm. 

 high, glabrous, with pubescent lines; leaves with very short petioles; blades 

 lanceolate or ovate-lanceolate, glabrous, very thin, 5-7 cm. long, acutish at both 

 ends, denticulate; corolla white, about 4 mm. long; capsule 6-7 cm. long, on 

 pedicels about 1 cm. long; seeds acute at the base, obtuse at the apex; coma 

 scant, white, about 6 mm. long. Lake shores: w Mont. Jl. 



12. E. rubescens Rydb. Perennial, with turions; stem 3-4 dm. high, 

 strict and simple, often more or less reddish, glabrous below, crisp-hairy above 

 and more or less on the decurrent lines; leaves 3-4 cm. long, lanceolate, very 

 acute, slightly crisp-hairy beneath when young; petals about 4 mm. long; pods 

 4-5 cm. long, more or less crisp-pubescent; seeds without neck; coma white. 

 Springs: Colo. Utah. Submont. Mont. Jl-Au. 



13. E. stramineum Rydb. Stem 5-6 dm. high, simple, straw-colored, 

 glabrous or somewhat puberulent below, pubescent and glandular in the inflor- 

 escence; leaves sessile, light green, lanceolate, tapering at both ends, 4-5 cm. long; 



