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Stillingia linearifolia

Queen's-root, Stillingia linearifolia, photo © by Michael Plagens

Observed at Joshua Tree National Monument, California. 30 April 2010.

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RANGE: Found along washes and canyons mostly in western Arizona where it runs into the Mojave Desert, but also in scattered locations in the Chihuahuan Desert areas of southeastern Arizona.

PERENNIAL: The base of plant becoming woody. The plant regrows from the crown after extended drought kills above ground portions. Height mostly less than 50 cm.

LEAVES: The leaves are linear and alternate on the stems. The margins are smooth.

FLOWERS: The small greenish-red flowers are separate male and female. The female flowers occur singly on the spike and soon give rise to a three-lobed fruit. The male flowers are minute and clustered into about three per group and the groups arrayed along a slender spike above the female flowers.

FRUIT: The three-sided capsules are shiny green-red and almost 4mm in diameter.

UNARMED: No thorns, but the sap can be a skin/eye irritant.

Euphorbiaceae -- Spurge Family

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Copyright Michael J. Plagens, page created 8 June 2012