EVENING-PRLMROSE FAMILY 591 



Seeds glabrous. 



Capsules torulose, less than three times as long as the pedicels, lisually more or less 



- clavate. 



Petals 3-6 mm. long; capsules scarcely longer than the pedicels. 



^ , 4. G. diffusum. 



Petals 1-3 mm. long. 



Plant pubescent with spreading hairs. 5. G. caesium. 



Plant glabrous throughout or the young capsules strigillose. 



Petals 1.5-2.5 mm. long, rose with j^ellow base; capsules 8-12 mm. long, 



nearly twice as long as the pedicels. 6. G. intermedium. 



Petals about 1 mm. long, rose or wiiite. 



Capsules decidedly clavate. roimded at the apex, seldom longer than 

 the pedicels, spreading or reflexed. 7. G. ramosissimum. 



Capsules only shghtly if at all clavate, narrow, usually longer than 

 the pedicels, and erect. 8. G. Nuttallii. 



Capsules neither tonilose nor clavate; pedicel very short. 



Capsules narrow, scarcely flattened, with suberect seeds. 9. G. racemosum. 



Capsules broader, flattened contrary to the septum, with obhque seeds. 



10. G. pumilum. 



1. G. eriospermum Coville. Stem 3-5 dm. high, widely branched, gla- 

 brous; leaves narrowly linear, 3-5 cm. long; pedicels 5-10 mm. long, erect; sepals 

 3^ mm. long, strigose; petals rose-colored in age; capsule strigose, erect, about 

 1 cm. long, torulose, 8-10-seeded. Sandy soil: Ore. — Ida. — Calif. Son, Jl-S. 



2. G- lasiospermum Greene. Stem 3-6 dm. high; leaves narrowly linear, 

 1-3 cm. long; pedicels erect, 2-~4 mm. long; petals white, often turning rose- 

 colored; capsules erect, shghtly clavate, scarcely torulose, glabrous or strigillose, 

 6-10 mm. long. Sandy soil: Wash. — Mont. — Utah — Calif. Plain — Submoni, 

 Je-Au. 



3. G- Helleri Rydb. Stem 1-3 dm. high; leaves linear, 0.5-2 cm. long, 

 softly hirsutulous; pedicels very short, even in fruit scarcely more than 1 mm. 

 long; petals scarcely 1 mm. long; capsules linear, erect, 8-10 mm, long, ahnost 

 sessile, hirsutulous, not torulose. Sandy places: Ida. — Wyo. — Calif. Submont. 

 Je-Jl. 



diffusum T. & G. Stem di 



tr nearly so: leaves linear. 2-6 



3-6 dm 



yoimg; sepals about 2 mm. long; capsule clavate, torulose, 5-10 mm. long, 

 usually erect. Sandy places: Mont. — Wyo. — Utah — Calif . — Wash. Submont. 

 — Mont, Je-Au, 



5- G. caesium T. & G. Stem 1-5 dm. high; branched; leaves linear or nar- 

 rowly linear-oblanceolate, 2-5 cm. long, sepals and petals 1-2 mm. long; capsule 

 clavate, torulose, 8-10 mm. long; erect, short-pedicelled. Sandy places: Mont. 

 — Wyo. — Utah— Calif. — Wash. Son. — Subniont, Je-Au. 



6. G. intermedium Rydb, Stem Tvhite and shining, with more or less 

 peeling bark, profusely branched, 3-7 dm. high, erect; leaves linear or nearly so, 

 light green; sepals about 1.5 mm, long, yellowish; capsule somewhat clavate and 

 torulose, somewhat strigose when young. Sandy soil: Mont. — Colo, — Calif. — 

 Wash. Submont. — Mont, Jl-Au. 



7. G. ramosissimum T. & G. Stem diffusely branched, 3-6 dm. high; 

 leaves linear, 2-A cm. long; petals white or rose-colored; capsule 3-8 mm. long, 

 decidedly torulose, spreading or usually reflexed. Sandy places and on hillsides: 

 Mont.— ^.D. — Colo. — Ariz. — Calif. — B.C. Submont.— Mont. My-Au. 



8. G, Nuttallii T. & G. Stem 2-5 dm. high, glabrous, branched; leaves 

 1-3 cm. long, acute; capsule linear, 7-15 mm. long, somewhat torulose; pedicels 

 2-A mm. long. Sandy or dry soil, hillsides, etc.: S.D. — Colo. — Ariz. — Calif. — 

 Wash. Submont, Jl-S. 



9. G. racemosum T. & G. Stem 1-3 dm. high, more or less branched, 

 glabrous or slightly strigose above; leaves hnear, 2-4 cm. long, usually glabrous; 

 sepals and petals mostly less than 1 mm. long; capsule narrow^ linear, 1-1.5 

 cm. long, glabrous, erect, almost sessile. Sandy soil: S.D. — Colo. — Calif. — 

 Wash. Submont. — Subalp. Je~Au. 



10. G. pumilum. S. Wats, 'Stem 1-2 dm. high, glabrous or nearly so, 

 simple or branched at the base; leaves narrowly linear-oblanceolate, acute, 2-4 



