110 
ONAGRACEAE 
to nearly white, often marked with spots of deeper color. (C. H. Godet, 
1797-1879, author of “Flora de Jura.”) 
Capsule not ribbed or indistinctly so, terete or teretish. 
Flowers loosely spicate-paniculate....1. G. amoena. 
Flowers spicately scattered. 
Buds nodding ... 2. G. bottae. 
Buds erect. 
Calyx-lobes commonly distinct and closely reflexed... 
3. G. quadrivulnera. 
Calyx-lobes united and turned to one side under the open flower. 
4. G. epilobioides. 
Capsule 8-ribbed, more or less 4-sided.5. G. purpurea. 
1. G. amoena (Lehm.) Lilja. Summer’s Darling. Loosely branching, 
4 to 7 dm. high; petals cuneate-obovate, truncate or obtuse at apex, ab¬ 
ruptly short-clawed, 1.8 to 2.4 cm. long; capsules 2.4 to 3.6 cm. long, nar¬ 
rowed at both ends.—Santa Cruz and n. 
2. G. bottae Spach. Erect, simple or branching from the base, 3 to 
7 dm. high; leaves linear to lanceolate; petals pink or light crimson, 1.2 
to 2.5 cm. long; capsules scattered.—S. Cal. and South Coast Ranges. 
3. G. quadrivulnera (Dougl.) Spach. Simple or with erect branches 
from the base, finely pubescent; leaves linear or narrowly oblong; petals 
purplish, often with a crimson spot, 1.2 cm. long; capsules 4-sided, 2 
ribs on each side.—Hill country. 
4. G. epilobioides Wats. Plants 1.5 to 7.6 dm. high, with slender, 
mostly simple stems; calyx red; petals light purple or white, 6 to 12 mm. 
long; capsules shortly pediceled.—S. Cal. 
5. G. purpurea (Curtis) Don. Stem simple and stout, 1.5 to 6 dm. 
high; leaves ovatish-oblong or oblong, the upper oblong-lanceolate or 
lanceolate; petals broad wedge-shape, light crimson with a darker spot 
in middle at apex.—Open valleys. 
5. OENOTHERA L. 
Flowers yellow or white, often turning reddish or greenish. Calyx- 
tube prolonged beyond the ovary, its lobes reflexed. Capsule chartaceous 
to woody, often contorted or spirally coiled, sessile. (Greek oinos, wine, 
and therea, pursuit, name given by Dioscorides to some now unknown 
plant, the roots of which were eaten to incite desire for wine.) 
Calyx-tube much prolonged beyond the ovary. 
Calyx-tube linear; stem leafy. 
Tall plants; flowers yellow.1. O. biennis. 
Low plants ; flowers white.:..2. O. californica. 
Calyx-tube filiform ; stem subterranean; leaves in rosettes on the ground. 
Perennial; leaves ovate or oblong.3. O. ovata. 
Annual; leaves linear.4. O. graciliflora. 
Calyx-tube obconic, little prolonged beyond ovary; stems leafy. 
Capsule sharply quadrangular, contorted or coiled. 
Herbage canescently pubescent; leaves thick, mostly entire. 
5. O. cheiranthifolia. 
Herbage more less hirsute ; leaves thinner, denticulate. 
Petals 2 to 4 mm. long, not spotted...6. O. micrantha 
Petals 8 to 14 mm. long, spotted at base.7. O. bistorta 
Capsule narrowly linear, obtusely angled. 
Flowers axillary, yellow...8. O. strigulosa 
Flowers in a nodding spike, white or rose-color; capsule contorted. 
9. O. gauraeflora. 
