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Engard, Rodney G.
Hibiscus coulteri Harv. ex A. Gray
Coulter hibiscus, Desert rose-mallow, Desert rosemallow
Synonym(s): Hibiscus coulteri var. brevipedunculatus
USDA Symbol: HICO
USDA Native Status: L48 (N)
Desert rose-mallow or Coulter hibiscus is handsome ornamental, grown for its showy flowers. Straggling to a width of 2 ft., the slender, woody, flowering stems rise to a height of 5 ft. Large, yellow, cup-shaped flowers, sometimes tinged with red or purple at the base, are borne atop the stems. A shrubby plant with rough hairs, undivided lower leaves, divided upper leaves, and large, cup-shaped, whitish to yellow flowers, often tinged with red.
A humble relative of the brilliant tropical Hibiscus plants, members of a genus that contains almost 300 species.
Bloom InformationBloom Color: Yellow
Bloom Time: Mar , Apr , May , Jun , Jul , Aug , Sep , Oct , Nov
, TX Native Distribution:
to s. AZ
& adjacent Mex. Native Habitat:
Rocky slopes; steep, canyon walls
Growing ConditionsLight Requirement: Part Shade
Soil Moisture: Dry
Soil Description: Dry, rocky soils.
Conditions Comments: Drought tolerant. This plant should be cut back nearly to the base each winter to encourage a bushier habit and more blooms. Coulter hibiscus flowers during the hottest part of the season when other plants are not showy. It is short-lived, but reseeds freely.
BenefitUse Wildlife: Deer browse this plant.
Conspicuous Flowers: yes
PropagationDescription: Will germinate from fresh, untreated seed planted in spring after last frost. Very easily grown from softwood cuttings taken from summer to fall.
Seed Collection: Gather seeds as soon as capsules begin to dry. Air dry and separate seeds from capsules. Fumigate and store in ventilated containers in cool, dry place.
Seed Treatment: Not Available
Commercially Avail: yes
Record Last Modified: 2007-01-01
Research By: TWC Staff