Sonoran Desert Naturalist >>> Field Guide >>> Sonoran Desert Flora >>> Rosaceae >>> Coleogyne ramosissima


Coleogyne ramosissima

Blackbrush, Coleogyne ramosissima, photo © by Michael Plagens

Photographed near Cottonwood Spring, Joshua Tree National Monument, California. 3 May 2010.

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RANGE: Along the far northwestern reaches of the Sonoran Desert where it merges into the Mojave Desert. This plant was photographed at Joshua Tree National Monument where parts of the park are classified as Colorado Desert, a subset of the Sonoran. It is also prevalent in the Great Basin Desert.

blackbrush habitus © by Michael Plagens

LEAVES: The leaves are gathered into clusters and are narrowly elyptic often with the tips wider than the base. Thick and tough-textured. Margins are smooth.

FRUIT: A single seed developes from each flower and is enclosed in a tough coat.

SHRUB: A medium-sized shrub often about a meter tall with densely intricate branching. Twigs are light to dark gray. In a particular landscape many of the shrubs are about the same size.

FLOWERS: Bright yellow, rose-like flowers about 2cm in diameter appear May to June.

UNARMED: The twigs are stiff enough to injure someone trying to bushwack through, but are without thorns.

Rosaceae -- Rose Family

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More Information:

Sonoran Desert Field Guide
Sonoran Desert Places
Sonoran Desert Naturalist Home Page


Copyright Michael J. Plagens, page created 12 Feb. 2012