Phemeranthus thompsonii

(N. D. Atwood & S. L. Welsh) Kiger

Novon 11: 321. 2001.

IllustratedEndemicConservation concern
Basionym: Talinum thompsonii N. D. Atwood & S. L. Welsh Great Basin Naturalist 45: 485, fi g. 1. 1985
Treatment appears in FNA Volume 4. Treatment on page 495. Mentioned on page 490, 494.

Plants to 5 dm; roots tuberous, fleshily woody. Stems spreading-ascending, branching, suffrutescent. Leaves sessile; blade subterete, to 3.5 cm. Inflorescences cymose, overtopping leaves; peduncle not scapelike, to 1 cm. Flowers: sepals persistent, ovate, to 5 mm; petals pink, obovate, to 8 mm, apex short-acuminate; stamens 10; stigma 1, capitate. Capsules apically keeled along sutures, ellipsoid, to 6.5 mm. Seeds without arcuate ridges, to 1.3 mm.


Phenology: Flowering Jul–Aug.
Habitat: Pinyon-juniper and ponderosa pine communities in silicious conglomeritic gravel
Elevation: 2000-2500 m

Discussion

Of conservation concern.

Phemeranthus thompsonii is known only from Emery County. It is very similar to, and perhaps should be merged with, P. validulus, from which it differs mainly in having much shorter peduncles. When originally described, P. thompsonii was thought to differ also in having fewer stamens and longer leaves and petals, but in fact P. validulus sometimes has as few as six stamens, and has maximum leaf and petal lengths greater than those found in P. thompsonii.

Selected References

None.

Lower Taxa

None.
... more about "Phemeranthus thompsonii"
short-acuminate +
Robert W. Kiger +
(N. D. Atwood & S. L. Welsh) Kiger +
membranous to chartaceous +
Talinum thompsonii +
occasionally dentate;crisped +
subterete +
0 cm0 mm <br />0 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
succulent +
0.1 cm1 mm <br />0.001 m <br /> (?) +  and 0.3 cm3 mm <br />0.003 m <br /> (?) +
ellipsoid +  and keeled +
0 cm0 mm <br />0 m <br /> (?) +  and 0.65 cm6.5 mm <br />0.0065 m <br /> (?) +
2000-2500 m +
not separating +
differentiated +
not separating +
differentiated +
pedicellate +, many-flowered +  and secund +
cleistogamous +
3[-5]-carpelled +
Pinyon-juniper and ponderosa pine communities in silicious conglomeritic gravel +
paniculate +  and racemose +
axillary +, terminal +  and lateral +
subrosulate +, subopposite +  and alternate +
plurilocular +
short;elongate +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
gray +  and pale white +
fugacious +
connate +  and distinct +
obovate +
0 cm0 mm <br />0 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Flowering Jul–Aug. +
estrophiolate +
brown +  and black +
sculptured +  and smooth +
circular-reniform +  and compressed +
0 cm0 mm <br />0 m <br /> (?) +  and 0.13 cm1.3 mm <br />0.0013 m <br /> (?) +
persistent +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Illustrated +, Endemic +  and Conservation concern +
with filaments +  and distinct +
suffrutescent +
spreading-ascending +
Talinum sect. Phemeranthus +
Phemeranthus thompsonii +
Phemeranthus +
species +
deciduous +
fleshy +  and succulent +