Phemeranthus teretifolius

(Pursh) Rafinesque

Specchio Sci. 1: 86. 1814.

Common names: Rock-portulaca
Endemic
Basionym: Talinum teretifolium Pursh Fl. Amer. Sept. 2: 365. 1814
Synonyms: Claytonia teretifolia (Pursh) Kuntze Talinum ciliatum Lindley
Treatment appears in FNA Volume 4. Treatment on page 495. Mentioned on page 490.

Plants to 5 dm; roots elongate, fleshy. Stems ± erect, simple or sometimes branching. Leaves sessile; blade terete, to 6 cm. Inflorescences cymose, overtopping leaves; peduncle scapelike, to 25 cm. Flowers: sepals deciduous, elliptic to ovate, 3–4 mm; petals rose-purple, obovate, 5–7 mm; stamens 12–20; stigma 1, subcapitate or sometimes indistinctly 3-lobed. Capsules subglobose, 4–5 mm. Seeds without arcuate ridges, 0.8–1 mm. 2n = 48.


Phenology: Flowering Apr–Oct.
Habitat: Thin, rocky or sandy soil, usually on or near edges of sandstone, granitic, and serpentine outcrops
Elevation: 200-1000 m

Distribution

V4 1007-distribution-map.gif

Ala., Ga., Ky., Md., N.C., Pa., S.C., Tenn., Va., W.Va.

Discussion

Phemeranthus teretifolius is an allopolyploid derived from P. parviflorus and P. mengesii, both of which it evidently outcompetes within its southern Appalachian range (M. E. B. Carter and W. H. Murdy 1985; W. H. Murdy and M. E. B. Carter 1985, 2001).

Selected References

None.

Lower Taxa

None.
... more about "Phemeranthus teretifolius"
Robert W. Kiger +
(Pursh) Rafinesque +
membranous to chartaceous +
Talinum teretifolium +
occasionally dentate;crisped +
0 cm0 mm <br />0 m <br /> (6 cm60 mm <br />0.06 m <br />) +
succulent +
0.1 cm1 mm <br />0.001 m <br /> (?) +  and 0.3 cm3 mm <br />0.003 m <br /> (?) +
subglobose +
0.4 cm4 mm <br />0.004 m <br /> (?) +  and 0.5 cm5 mm <br />0.005 m <br /> (?) +
Rock-portulaca +
Ala. +, Ga. +, Ky. +, Md. +, N.C. +, Pa. +, S.C. +, Tenn. +, Va. +  and W.Va. +
200-1000 m +
not separating +
differentiated +
not separating +
differentiated +
pedicellate +, many-flowered +  and secund +
cleistogamous +
3[-5]-carpelled +
Thin, rocky or sandy soil, usually on or near edges of sandstone, granitic, and serpentine outcrops +
paniculate +  and racemose +
axillary +, terminal +  and lateral +
subrosulate +, subopposite +  and alternate +
plurilocular +
short;elongate +
0 cm0 mm <br />0 m <br /> (25 cm250 mm <br />0.25 m <br />) +
gray +  and pale white +
rose-purple +
fugacious +
connate +  and distinct +
obovate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Flowering Apr–Oct. +
Specchio Sci. +
elongate +
estrophiolate +
brown +  and black +
sculptured +  and smooth +
circular-reniform +  and compressed +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (?) +  and 0.1 cm1 mm <br />0.001 m <br /> (?) +
deciduous +
elliptic;ovate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
with filaments +  and distinct +
12 +  and 20 +
branching +  and simple +
suffrutescent +
Claytonia teretifolia +  and Talinum ciliatum +
Phemeranthus teretifolius +
Phemeranthus +
species +
deciduous +
fleshy +  and succulent +