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; anthei-s 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, upner part of the pedimcle, and pedicels puberulent; bracts small, 

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



Leaves pubescent. . . , 



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



17. D, Cusickii. 



Plantabout 5 cm. high, usually 1-fiowered; petioles obsolete. 18. D. uniflorum. 



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

 blades elongate-ovate, sinuate-dentate, obtiise, 3-10 cm. long, \^er>^ 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 simmiit. Motmtain valleys: Calif. — 

 Utah . Sub77iont. — MonL Je-Au. 



3. D. JefEreyi 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 smnmit. ? D, dispar A. Nels. Moimtain 

 valleys: Calif.— Ida.— B.C. SubmonL—MonL 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 3^ mm. 

 long; lobes lanceolate, acute or acuminate; corolla purple; lobes Imcar, 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. crenafurn Greene. Wet places in the mountains: Alaska — Mont.^Ore. 

 Submont.—Mo?it, Jl-Au. 



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

 1.5-4 cm. lon^g, 1-2 cm. wide, rounded at the apex, abruptly contracted at the 

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

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

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

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

 the apex. Moist places: Ore. — Wyo. — Mont. SubmonL—MonL Ap. 



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

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

 ing telow; scape 1-2 dm. high, glabrous; cal^-x-tube 3-^ mm. long; lobes 3-4 mm. 

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

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

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

 Wash.— Mont. MonL My. 



multiflorum Rydb. Leav 



obtusish, narrowly 



3^ 



