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Calylophus hartwegii
Calylophus hartwegii (Benth.) P.H. Raven
Hartweg's Sundrops, Western Primrose
Onagraceae (Evening Primrose Family)
Synonym(s):
USDA Symbol: CAHA14
USDA Native Status: L48 (N)
Plant Characteristics
Duration: PerennialHabit: Herb
Leaf Retention: Deciduous
Fruit Type: Capsule
Size Notes: Up to about 2 feet tall, often shorter.
Bloom Information
Bloom Color: YellowBloom Time: Mar , Apr , May , Jun , Jul , Aug , Sep , Oct , Nov
Distribution
USA: AZ , CO , KS , NM , OK , TXNative Habitat: Prairie, Plains, Meadows, Pastures, Savannas
Growing Conditions
Water Use: LowLight Requirement: Part Shade
Soil Moisture: Dry
Soil Description: Clay, Clay Loam, Medium Loam, Sandy Loam, Sandy, Limestone-based, Gypseous, Caliche type
Conditions Comments: Somewhat upright and bushy plant with narrow leaves and soft yellow cup flowers that open in the evening and close the next afternoon shortly before new flowers open. This plant prefers fast draining soil and loves reflected heat making it an excellent choice for a rock garden or rocky slope. Deadheading and giving it some summer water will prolong the flowers. Cut back to 6-8" in the autumn to reshape.
Benefit
Use Ornamental: Perennial garden, Color, Blooms ornamental, Rock gardens, Showy, AttractiveConspicuous Flowers: yes
Nectar Source: yes
Propagation
Propagation Material: SeedsBibliography
Bibref 318 - Native Texas Plants: Landscaping Region by Region (2002) Wasowski, S. & A. WasowskiBibref 286 - Wildflowers of the Texas Hill Country (1989) Enquist, M.
Search More Titles in Bibliography
Web Reference
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Additional resources
USDA: Find Calylophus hartwegii in USDA PlantsFNA: Find Calylophus hartwegii in the Flora of North America (if available)
Google: Search Google for Calylophus hartwegii
Metadata
Record Modified: 2023-01-26Research By: DEW, JSC