Paper Flower.
Psilostrophe cooperi, Aster Family: ( Asteraceae ) ( Compositae ) also known as the Helenieae Family: ( Helenieae ), Paper Flower. Also Called: Whitestem Paperflower, Cooper's Paperflower, Paperflower, Riddellia cooperi.

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Paper Flower, Psilostrophe cooperi is a low growing, spreading, perennial bush; with pale green, hairy foliage. Its daisylike flower heads have 3 to 8 deeply toothed golden-yellow ray florets. The flower heads are often bunched together at the tops of the stems in a rounded spray.

The flowers persist for a time and then dry and become papery while maintaining their yellow color. Thus, their common name, Paper Flower.

Quick Notes:

Height: Up To About 24" Tall.

Flowers: Yellow flowers on stem terminals. When they dry they become paperlike. One inch wide flowers with 3 lobes on each end.

Flowering Time: March - Sept following rains.

Leaves: Very slender, linear up to 2 inches long and up to 1/2 inch wide, alternate, green top, underside silver, hairy when young.

Found: Native to the Mojave and Sonoran Deserts of California, the Southwestern United States, and northwestern Mexico. Found throughout lower elevations in Arizona.

Hardiness:
USDA Zone 8b: to -9.4 �C (15 �F)
USDA Zone 9a: to -6.6 �C (20 �F)
USDA Zone 9b: to -3.8 �C (25 �F)
USDA Zone 10a: to -1.1 �C (30 �F)
USDA Zone 10b: to 1.7 �C (35 �F)
USDA Zone 11: above 4.5 �C (40 �F)

Soil pH requirements:
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)

Sun Exposure:
Full Sun

Elevation: 492 and 4,921 feet.

Habitat: Rocky slopes, mesas, sandy river bottoms, and washes in the deserts, and desert grassland ranges. An ideal xeriscape landscape plant in Arizona.

Miscellaneous: Flowering Photos Taken June 13, 2003. Date Creek, Arizona.