Euphorbia davidii

An occasional weed in cultivated areas and also occurring in washes at lower and intermediate elevations. Leaf shape and ovary pubescence are variable, and forms with narrow leaves and pubescent ovaries have been named Euphorbia cuphosperma. However, these two traits are independent and neither shows a clear disjunction.

A relatively broad-leafed plant at Bar Canyon on the west side of the Organ Mountains, 27 Aug 2008.

Leaves a bit narrower, Bar Canyon, 27 Aug 2008.

Leaves narrower still. Bar Canyon, 27 Aug 2008.

And the narrow- & small-leaved extreme of the local variation. Bar Canyon, 27 Aug 2008.

Closer view of cyathia on the above plant at Bar Canyon, 27 Aug 2008.

A broad-leaved plant with pubescent ovaries near Miller Spring in the Peloncillo Mountains, 31 Aug 2008.

Closer view of the cyathia, showing the pubescent ovaries, Peloncillo Mountains, 31 Aug 2008.

Flowering stems of a narrow-leaved form at Mill's Canyon, 9/22/06.

Closer view of the above plant, showing the sparsely-pubescent ovaries, 9/22/06.

Flowering stem in Portal, AZ, 9/4/04.

Closer view of flowers in Portal, 9/4/04.