| Family: | Onagraceae |
|---|---|
| Common name: | evening primrose family [Zomlefer, pp. 229-232] |
| Diversity: | Worldwide: 18 genera; 650 species U.S.: 13 genera PNW (Hitchcock & Cronquist): 9 genera |
| Flower -- Vegetative Features -- Economic Importance -- Flower Images-- Web Sites | |
| Flower | |
|---|---|
K4 Co4 S8 P.GIF) |
|
| Sexuality: | bisexual |
| Symmetry: | actinomorphic |
| Inflorescence: | raceme, spike, panicle, or solitary |
| Calyx (sepals): | 4 separate, inserted on hypanthium |
| Corolla (petals): | 4 (rarely 2 or absent) separate, often clawed |
| Androecium: | 8 separate, biseriate (or 4, uniseriate), pollen often shed in tetrads, connected by viscin threads |
| Gynoecium: | 4 united carpels, ovary inferior with hypanthium (=epigynous), single style |
| Fruit: | capsule, (less common nutlet or berry) |
| Other features: | hypanthium often tubular or campanulate (bell-shaped) cytology well-studied for many w. N. American species |
| Vegetative Features | |
|---|---|
| Leaves: | alternate or opposite, simple, exstipulate |
| Life-history: | perennial, also annual and biennial |
| Habit: | herbs, rarely shrubs or trees |
| Distribution & Ecology: | temperate and subtropical regions of both hemispheres diversity in w. N. America |
| Some Northwest Genera: | Epilobium, fireweed, willow herb Clarkia, clarkia Camissonia, evening primrose Oenothera, evening primrose |
| Economic Importance | |
|---|---|
| Crops: | |
| Ornamentals: | Fuchsia, fuchsia Oenothera, evening primrose |
| Weedy and pest species: | Oenothera spp. |
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