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New Mexico Silverbush

Argythamnia neomexicana

Argythamnia neomexicana, photo © by Michael Plagens

Observed near a recently flooded wash in the Rainbow Valley, Maricopa Co., Arizona, USA. 12 Sept. 2009.

LEAVES: Leaves are less silvery and more broadly elyptic than leaves of A. lanceolata; the margins are entire. Sap is clear not milky as in many Sonoran Desert euphorbs.
small white flower of Argythamnia
FLOWERS: Whitish-green clusters of small flowers occur in the leaf axils. With magnification notice green flowers with stamens and separate flowers with a branched stigma. That is the flowers are monoeceous. Flowering late spring and again in summer if rain happens.

FRUIT: Three-valved capsule borne with obvious, silvery hairs.

HERB: Mostly herbaceous plant rarely reaching ½ meter tall. Rather leafy when moisture is available and may survive as a perennial from one season to next under ideal conditions.

RANGE: Locally common along washes and at roadsides in the Sonoran Desert.


Euphorbiaceae -- Spurge Family

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Copyright Michael J. Plagens, 1999-2010