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Seaside sandmat cyathia (cup-like reproductive structures typical of euphorbs) develop between pairs of leaves, typically one cyathium with a short reddish stalk per pair of leaves. On the rim of the cyathium are four to six red nectar glands; each nectar gland alternates with a narrow, elongate lobe. In the center of the cyathium is a female flower with a three-lobed, light green ovary topped by a tripartite style; the flower sits on a stout pedicel that elongates and curves as it matures. Between the central female flower and the rim of the cyathium are several male flowers, each consisting of a single stamen. Seaside sandmat prefers beach habitats around the Great Lakes and along the Atlantic coast.

Euphorbia

Euphorbia polygonifolia

seaside sandmat [Blooms: Jul-Sep]