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Annual toothleaf

Stillingia spinulosa

Also called Annual Stillingia

Annual toothleaf
Photo: Joshua Tree National Park, Public domain
Family
Euphorbiaceae (Spurge family)
Grows as
Annual, Perennial
Native range
S. Nevada, SE. California, SW. Arizona, Mexico (Baja California Norte, Sonora)
Climate
desert or dry shrubland

About

Stillingia spinulosa is a species of flowering plant in the euphorb family known by the common name annual toothleaf. It is native to the Southwestern United States where it occurs in the creosote scrub of the deserts. It is an annual or perennial herb producing a clump of thick, leafy stems approaching a meter in maximum height. The alternately arranged leaves have shiny pointed oval blades 2 to 4 centimeters long and up to 1.2 centimeters wide which are lined with sharp teeth. The inflorescence is a stout spike of flowers 1 to 2 centimeters long. The plant is monoecious, and each spike has several male flowers at the tip and 1 or 2 fruit-bearing female flowers below these. Neither type of flower has petals. The ovary of the female flower develops into a three-lobed greenish capsule about half a centimeter wide.

Other Stillingia plants

Stillingia acutifolia · Water toothleaf · Stillingia argutedentata · Stillingia bicarpellaris · Stillingia bodenbenderi · Stillingia dichotoma · Stillingia diphtherina · Queen's-root · Bois Jasmin · Stillingia oppositifolia · Stillingia parvifolia · Mojave toothleaf

Text excerpted from the Wikipedia article Stillingia spinulosa by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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