| 词条 | Psilostrophe cooperi |
| 释义 |
|image = Psilostrophe cooperi 3.jpg |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Asterales |familia = Asteraceae |tribus = Heliantheae |genus = Psilostrophe |species = P. cooperi |binomial = Psilostrophe cooperi |binomial_authority = (A.Gray) Greene |}} 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. Habitat and range{{Empty section|date=July 2014}}Growth patternPsilostrophe 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 leavesThe linear leaves are alternate.[1] InflorescenceThe 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] References1. ^1 2 3 Mojave Desert Wildflowers, Pam MacKay, 2nd Ed. 2013, p. 211 External links
5 : Heliantheae|Flora of Northwestern Mexico|Flora of the Southwestern United States|Flora of the California desert regions|Flora of the Sonoran Deserts |
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