Portulaca grandiflora
cultivated purslane, moss-rose, rock rose, rose moss
prostrate to suberect;
trichomes conspicuous at nodes and in inflorescence;
branches to 30 cm.
blades linear to lanceolate, terete to hemispheric, 5–30 × 1–5 mm, apex acute or subacute; involucrelike leaves 8–9(–14).
25–55 mm diam.;
petals pink, red, purple, yellow, bronze, or white, obovate, 15–25 × 15–20 mm;
stamens 40 or more;
stigmas 5–8.
ovoid, (3.5–)4–6.5 mm diam.
steely gray, often iridescent, orbiculate or elongate, flattened, 0.75–1 mm diam.;
surface cells obscurely stellate with tubercles mostly abaxially.
= 18.
Portulaca grandiflora
Portulaca grandiflora is naturalized in gardens and has escaped to roadsides and waste places. Studies of seed surfaces from specimens representing 100 years of collections with distribution over the United States show remarkable consistency in seed morphology. Tubercles may extend onto the lateral surface, where they are widely scattered. Only one specimen was found with no tubercles at all.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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