Portulaca denudataPoelln. [family PORTULACACEAE ] Verified by Not on sheet., Portulaca umbraticolaKunth [family PORTULACACEAE ] (stored under name); Verified by Not on sheet.,
Related name
Portulaca lanceolata
Portulaca umbraticola
Portulaca denudata
Flora
Entry for Portulaca umbraticola Kunth [family PORTULACACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 4,
Names
Portulaca umbraticolaKunth [family PORTULACACEAE], in A. von Humboldt et al., Nov. Gen. Sp., 6: 72. 1823
Treatment Author(s)
James F. Matthews
Information
Plants annual; roots fibrous. Stems prostrate to suberect; trichomes sparse at nodes and in inflorescence, stems otherwise glabrous; branches 5–20 cm. Leaf blades obovate, spatulate, or sometimes lan-ceolate, flattened, 10–35 × 2–15 mm, apex rounded to truncate; involucrelike leaves 4–5. Flowers 8–15 mm diam.; petals yellow or yellow tipped with red or copper, spatulate or obovate, 5–10 × 3–6 mm, apex acute or cuspidate; stamens 7–30; stigmas (3–)5–18. Capsules obovoid or turbinate, 3–5 mm diam., with encircling, expanded, membranaceous wing 0.5–1.5 mm wide proximal to suture. Seeds gray, round or elongate, flattened, 0.5–1 mm; surface cells stellate with long tubercles.
Distribution
North AmericaSouth America.
Discussion
Portulaca umbraticola is a common weedy species of the southwestern United States, while in the southeastern United States it is usually restricted to sandy soils of granitic and sandstone outcrops. In 1982–1983, a new cultivar was introduced to the United States in hanging baskets, under the name Portulaca umbraticola ‘Wildfire Mixed,’ which appears to be selected from material from South America. There is no seed surface variability in any of the three subspecies.
