Psilostrophe cooperi

Psilostrophe cooperi is a flowering plant in the daisy family known by the common names Cooper's paper daisy and whitestem paperflower. It is native to the Mojave and Sonoran Deserts of California, the Southwestern United States, and northwestern Mexico.

Psilostrophe cooperi
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Heliantheae
Genus:
Psilostrophe
Species:
P. cooperi
Binomial name
Psilostrophe cooperi

Growth pattern

Psilostrophe cooperi is perennial shrub with stems rising from a woody base to form that a nearly spherical form.[1] It is a low, spreading bush with pale green, hairy foliage. It drops its leaves in drought conditions (drought deciduous).[1]

Stems and leaves

The linear leaves are alternate.[1]

Inflorescence

The 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 ray flowers persist for a time and then dry and become papery while maintaining their yellow color. The 3 toothed corollas of the dried ray flowers fold back over the phyllaries.[1]

References
  1. Mojave Desert Wildflowers, Pam MacKay, 2nd Ed. 2013, p. 211


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