PRIMROSE FAMILY 653 



Petals lanceolate, long-acuminate. 11. D. acuminatum. 



Capsule opening by valves from the apex. 



Anthers more than twice as long as the short filaments. 



Leaf-blades oval or oblong; bracts oblong, mostly obtuse; plant slender- 



flowers 1-3 (rarely 4-5). 12. D. philoscia. 



Leaf-blades oblanceolate ; bracts lanceolate, acute; plant usually stout and 



many-flowered. 13. D. radicatum. 



Anthers less than twice as long as the filaments. 

 Whole plant glabrous. 



Bracts lanceolate, acute; anthers 4-5 mm. long, half longer than the 



filament-tube. 14. D. pauciflorum. 



Bracts oblong, obtuse; anthers 3-4 mm. long, only slightly longer than 



the filament-tube. 15. D. salinum. 



Bracts, upper part of the peduncle, and pedicels puberulent; bracts small, 



lanceolate, acute; anthers 3-4 mm. long. 16. D. puberulentum. 



Leaves pubescent. 



Plant 1-2 dm. high, usually more than one-flowered ; leaves with long petioles. 



17. D. Cusickii. 

 Plant about 5 cm. high, usually 1-flowered ; petioles obsolete. 18. D. uniflorum. 



1. D. dentatum Hook. Leaves with winged petioles, 3-10 cm. long; 

 blades elongate-ovate, sinuate-dentate, obtuse, 3-10 cm. long, very thin, gla- 

 brous; scape 2-3 dm. high, few-flowered; calyx-tube about 5 mm. long, glabrous; 

 lobes lanceolate, acuminate, about 4 mm. long; corolla white; lobes oblong, ob- 

 tuse, 8-10 mm. long; anthers about 5 mm. long, tapering upwards, but obtuse; 

 connective purple, smooth; capsule oblong, about 1 cm. long, opening by valves 

 from the apex. D. Meadia latilobum A. Gray. Rich wet soil in woods: Ore. 

 Utah Ida. B.C. Je-Jl. 



2. D. alpinum (A. Gray) Greene. Leaves linear-oblanceolate, 3-15 cm. 

 long, 5-10 mm. wide, glabrous, obtuse at the apex, entire; scape 1-3 dm. high, 

 usually few-flowered; calyx-tube 2 mm. long; lobes lanceolate, acute, 3-4 mm. 

 long; corolla bluish purple; lobes lanceolate, 10-18 mm. long; anthers linear, 

 about 7 mm. long; connective purple, smooth; capsule oblong-ellipsoid, about 

 7 mm. long, opening by valves from the summit. Mountain valleys: Calif. 

 Utah. Submont. Mont. Je-Au. 



3. D. Jeffrey! Moore. Leaves linear or linear-oblanceolate, 1-2 dm.^long, 

 1-2 cm. wide, glabrous, acutish, entire; scape 2-4 dm. high, several-flowered; 

 calyx-tube 4-5 mm. long; lobes lanceolate, acute; corolla bluish purple; lobes 

 2-2.5 cm. long, lanceolate; anthers about 1 cm. long; connective smooth, purple; 

 capsule opening by valves from the summit. ? D. dispar A. Nels. Mountain 

 valleys: Calif. Ida. B.C. Submont. Mont. Je-Au. 



4. D. viviparum Greene. Leaves oblong to oblanceolate, 6-15 cm. long, 

 acute or obtuse, sinuately toothed; scape 1.5-4 dm. high; calyx-tube 34 mm. 

 long; lobes lanceolate, acute or acuminate; corolla purple; lobes linear, 1-2 cm. 

 long, acute or obtuse; anthers linear, 7-9 mm. long; connective narrow, purple; 

 capsule circumscissile near the apex and later splitting, ovoid, about 1 cm. long. 

 D. crenatum Greene. Wet places in the mountains: Alaska Mont. Ore. 

 Submont. Mont. Jl-Au. 



5. D. conjugens Greene. Leaves glabrous, oval, elliptic, or rarely obovate, 

 1.5-4 cm. long, 1-2 cm. wide, rounded at the apex, abruptly contracted at the 

 base; scape 1-2 dm. high, 1-4-flowered; calyx-tube 4 mm. long; lobes lanceolate, 

 acute, about 5 mm. long; corolla from deep purple to rose or white; lobes linear, 

 acute, 15-18 mm. long; anthers 7-8 mm. long, mostly obtuse; connective broad, 

 lanceolate, white, rugose; capsule oblong, 10-12 mm. long, circumscissile near 

 the apex. Moist places: Ore. Wyo. Mont. Submont. Mont. Ap. 



6. D. cylindrocarpum Rydb. Leaf-blades oblanceolate, or oblong-spatu- 

 late, glabrous, 4-10 cm. long, 1-2 cm. wide, obtuse at the apex, gradually taper- 

 ing below; scape 1-2 dm. high, glabrous; calyx-tube 3-4 mm. long; lobes 3-4 mm. 

 long; corolla purple or white; lobes linear to lanceolate, 1-2 cm. long; anthers 

 5-7 mm. long, usually acute; connective lanceolate, white, rugose; capsule 15-20 

 mm. long, circumscissile near the apex. D. albidum Greene. Wet places: e 

 Wash. Mont. Mont. My. 



7. D. multiflorum Rydb. Leaves about 2 dm. long, sinuate-denticulate, 

 obtusish, narrowly oblanceolate, tapering below; scape stout, 3-4 dm. high; 



