188 
(Acassizia Spach, Hist. Veg. 4: 346. 1835.] 
(Hotosticma Spach, Nouv. Ann. Mus. Per. 4: 21. 1835.] 
Flowers yellow, turning red or green. 
Capsules fusiform, straight. 
Seeds cylindric-oblong. 1. S. aldinum. 
Seeds clavate. 2. S. Hilgardi. 
Capsules linear, somewhat curved, 
Plants puberulent or hirsute, 
Capsules scarcely beaked. 3. S. contortum. 
Capsules with a slender beak. 4. S. campestre. 
Plants viscid-glandular. 5. 5. chamaenerioides. 
Capsules linear or linear-fusiform, more or less contorted. 
Flowers less than 1 cm. broad. 
Lower stem-leaves linear or nearly so; species 
maritime, 6. S. micranthum. 
Lower stem-leaves ovate; species not maritime. 7. S. Airted/um. 
Flowers more than 1 cm. broad, 
Plant glabrous and lustrous. 8. S. nitidum. 
Plants pubescent and dull. 
Stems woody; leaves sessile. g. S. viridescens, 
Stems herbaceous; lower stem-leaves pet- 
ioled. 
Calyx canescent. 10, S. spirale. 
. 
Calyx hirsute. 
Capsule with a very short beak, 11. S. Bistorta, 
Capsule with a long slender beak. 12, S. Vettchianum. 
Flowers white or rose-colored; capsules terete or nearly so. : 
Plants glabrous (inflorescence glabrate); capsules en- 
larged at the base. 13. S, decorticans 
Plants pubescent or glandular. 
Capsules enlarged at the base, viscid-glandular, 14, S. Boothii. 
Capsules scarcely enlarged at the base. 
Plants more or Jess villous. 15. S. Utahense. 
Plants more or less puberulent. 
Leaves linear or nearly so. 16. S. refractum, 
Leaves spatulate, elliptic or lanceolate. 17. S. alyssoides. 
I. SPHAEROSTIGMA ANDINUM (Nutt.) Walp. 
OEnothera andina Nutt.; T. & G. Fl. N. A. 1: 512, 1840. 
Sphaerostigma andinum Walp. Repert. 2: 79. 1843. 
Washington to Montana, south to Nevada 2 and Utah; at 1800 
meters in Utah and Nevada. 
2. SpHAEROSTIGMA Hixcarp1 (Greene). ace hee 
OEnothera Hilgardi Greene, Bull. Torr. Club, 10: aq. wane oe 
Washington and | Oregon. ee ae 
