Euphorbia hyssopifolia, known by the common name of hyssopleaf sandmat in English and hierba de pollo ("chicken grass") in Spanish, is a member of the spurge family, Euphorbiaceae.

It is an annual herb, native to Central and South America and the Southeastern United States.

Because it is rather confusable with the usually slightly hairier E. nutans, fruit capsules should always be opened for seeds.

Seeds: "brown to grayish white, ovoid, slightly 4-angled in cross section, abaxial faces convex, adaxial faces slightly concave to slightly convex, 1–1.4 × 0.7–1.1 mm, with 2–3 prominent transverse ridges that do not interrupt adaxial keel, or coarsely and inconspicuously pitted-reticulate."

FNA (see also FNA nutans) Media related to Euphorbia hyssopifolia at Wikimedia Commons Data related to Euphorbia hyssopifolia at Wikispecies