Yellow Sundrops, Yellow Evening Primrose, Plains Evening Primrose, Toothed Evening Primrose, Calylophus australis, Meriolix intermedia, Meriolix oblanceolata, Meriolix serrulata, Oenothera serrulata, Oenothera serrulata var. typica
Calylophus serrulatus (Plains Evening Primrose) is a low, shrubby, woody-based perennial boasting small, yellow, four-petaled, stalkless flowers borne from the upper leaf axils. Blooming from mid-spring to mid-summer, the blossoms are more profuse at the beginning of the flowering period, becoming sporadic throughout the rest of the summer. Unlike many other evening primrose species, the flowers open in the evening and remain open for the entire day. They are followed by 1 in. long seed capsules (2.5 cm). The 2 in. leaves (5 cm) are narrow, lance-shaped, and sharply toothed. Native to western North America, Calylophus serrulatus can be found growing in dry prairies and mesas. A valuable plant for dry border fronts, rock gardens, and prairies.
| Hardiness |
3 - 8 |
|---|---|
| Climate Zones | 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24 |
| Plant Type | Perennials |
| Plant Family | Onagraceae |
| Genus | Oenothera |
| Exposure | Full Sun |
| Season of Interest |
Spring (Mid, Late) Summer (Early, Mid) |
| Height |
6" - 2' (15cm - 60cm) |
| Spread |
6" - 2' (15cm - 60cm) |
| Spacing |
6" - 18" (15cm - 50cm) |
| Maintenance | Low |
| Water Needs | Low |
| Soil Type | Loam, Sand |
| Soil pH | Acid, Alkaline, Neutral |
| Soil Drainage | Well-Drained |
| Characteristics | Showy |
| Native Plants | Arizona, Arkansas, Colorado, Illinois, Indiana, Iowa, Kansas, Kentucky, Michigan, Midwest, Minnesota, Missouri, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, Rocky Mountains, South Dakota, Southeast, Southwest, Texas, United States, Wisconsin, Wyoming |
| Tolerance | Drought, Dry Soil, Rocky Soil |
| Garden Uses | Beds And Borders |
| Garden Styles | Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow |
| Hardiness |
3 - 8 |
|---|---|
| Climate Zones | 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24 |
| Plant Type | Perennials |
| Plant Family | Onagraceae |
| Genus | Oenothera |
| Exposure | Full Sun |
| Season of Interest |
Spring (Mid, Late) Summer (Early, Mid) |
| Height |
6" - 2' (15cm - 60cm) |
| Spread |
6" - 2' (15cm - 60cm) |
| Spacing |
6" - 18" (15cm - 50cm) |
| Maintenance | Low |
| Water Needs | Low |
| Soil Type | Loam, Sand |
| Soil pH | Acid, Alkaline, Neutral |
| Soil Drainage | Well-Drained |
| Characteristics | Showy |
| Native Plants | Arizona, Arkansas, Colorado, Illinois, Indiana, Iowa, Kansas, Kentucky, Michigan, Midwest, Minnesota, Missouri, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, Rocky Mountains, South Dakota, Southeast, Southwest, Texas, United States, Wisconsin, Wyoming |
| Tolerance | Drought, Dry Soil, Rocky Soil |
| Garden Uses | Beds And Borders |
| Garden Styles | Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow |
How many Calylophus serrulatus (Plains Evening Primrose) do I need for my garden?
| Plant | Quantity | |
|---|---|---|
| Calylophus serrulatus (Plains Evening Primrose) | N/A | Buy Plants |
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Create a membership account to save your garden designs and to view them on any device.
Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.
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