Portulaca grandiflora |
Portulaca suffrutescens |
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cultivated purslane, moss-rose, rock rose, rose moss |
shrubby purslane |
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Habit | Plants annual; roots fibrous. | Plants perennial; roots tuberous. |
Stems | prostrate to suberect; trichomes conspicuous at nodes and in inflorescence; branches to 30 cm. |
stiffly erect, suffrutescent; trichomes conspicuous at nodes and in inflorescence; branches (8–)15–30 cm. |
Leaf | blades linear to lanceolate, terete to hemispheric, 5–30 × 1–5 mm, apex acute or subacute; involucrelike leaves 8–9(–14). |
blades linear, terete, (4–)8–20(–30) × 0.5–2.8 mm, apex acute to subacute; involucrelike leaves 6–9. |
Flowers | 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. |
25 mm diam.; petals orange, brown-orange, copper, or bronze, color often deepening at base, obcordate or emarginate, 7–12 × 4–5.5 mm; stamens 25–35; stigmas 4–7(–8). |
Capsules | ovoid, (3.5–)4–6.5 mm diam. |
subglobose, 2.5–5 mm diam. |
Seeds | steely gray, often iridescent, orbiculate or elongate, flattened, 0.75–1 mm diam.; surface cells obscurely stellate with tubercles mostly abaxially. |
leaden, slightly iridescent, 0.5–0.65 mm; surface cells loosely arranged in distinct rows, raised, stellate, tubercles usually present. |
2n | = 18. |
= 8. |
Portulaca grandiflora |
Portulaca suffrutescens |
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Phenology | Flowering late spring–fall. | Flowering spring–late summer. |
Habitat | Sandy soils | Rocky slopes, flats, grasslands, roadsides, sandy or gravelly soils along streams |
Elevation | 0-2000 m (0-6600 ft) | 900-2100 m (3000-6900 ft) |
Distribution |
AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; MI; MN; MO; MS; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; VT; WI; WV; ON; South America; naturalized in Europe [Introduced in North America]
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AZ; NM; TX; n Mexico
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Discussion | 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.) |
In the nonflowering condition, Portulaca suffrutescens resembles P. pilosa, although P. suffrutescens is stiffly erect. Another characteristic of this species is elongation of the internodes such that the overall impression of density of trichomes appears to be less than in P. pilosa. This feature will not be apparent in immature plants, or in those growing in dry conditions in which little internode elongation may have taken place. Immature seeds appear black, with rounded tubercles on the abaxial spine. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 4, p. 498. | FNA vol. 4, p. 500. |
Parent taxa | Portulacaceae > Portulaca | Portulacaceae > Portulaca |
Sibling taxa | ||
Name authority | Hooker: Bot. Mag. 56: plate 2885. (1829) | Engelmann: Bot. Gaz. 6: 236. (1881) |
Web links |
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