Flora of North America species comparison

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Phemeranthus calycinus

Phemeranthus thompsonii

largeflower fameflower

cedar mountain fameflower
Habit Plants to 4 dm; roots fleshily woody. Plants to 5 dm; roots tuberous, fleshily woody.
Stems

ascending or erect, simple or branching.

spreading-ascending, branching, suffrutescent.
Leaves

sessile;

blade subterete, to 7 cm.

sessile;

blade subterete, to 3.5 cm.
Inflorescences

cymose, much overtopping leaves;

peduncle scapelike, to 25 cm.

cymose, overtopping leaves;

peduncle not scapelike, to 1 cm.
Flowers

sepals persistent, ovate to suborbiculate, 4–6 mm;

petals pink- to red-purple, obovate, 10–15 mm;

stamens 25–45;

stigma 1, subcapitate, 3-lobed.

sepals persistent, ovate, to 5 mm;

petals pink, obovate, to 8 mm, apex short-acuminate;

stamens 10;

stigma 1, capitate.
Capsules

broadly ovoid, 6–7 mm.

apically keeled along sutures, ellipsoid, to 6.5 mm.
Seeds

without arcuate ridges, 1 mm.

without arcuate ridges, to 1.3 mm.
2n

= 24, 48.

Phemeranthus calycinus

Phemeranthus thompsonii
Phenology Flowering May–Oct. Flowering Jul–Aug.
Habitat Rocky or sandy soil, on or near outcrops Pinyon-juniper and ponderosa pine communities in silicious conglomeritic gravel
Elevation 100-1200 m (300-3900 ft) 2000-2500 m (6600-8200 ft)
Distribution
from FNA
AR; CO; IL; KS; LA; MO; NE; NM; OK; TX
[WildflowerSearch map]
[BONAP county map]
from FNA
UT
[BONAP county map]
Discussion

Some populations of Phemeranthus calycinus are diploid while others are tetraploid, the latter probably the result of autopolyploidy (W. H. Murdy and M. E. B. Carter 2001).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 4, p. 492. FNA vol. 4, p. 495.
Parent taxa Portulacaceae > Phemeranthus Portulacaceae > Phemeranthus
Sibling taxa
P. aurantiacus, P. brevicaulis, P. brevifolius, P. calcaricus, P. humilis, P. longipes, P. marginatus, P. mengesii, P. parviflorus, P. rugospermus, P. sediformis, P. spinescens, P. teretifolius, P. thompsonii, P. validulus
P. aurantiacus, P. brevicaulis, P. brevifolius, P. calcaricus, P. calycinus, P. humilis, P. longipes, P. marginatus, P. mengesii, P. parviflorus, P. rugospermus, P. sediformis, P. spinescens, P. teretifolius, P. validulus
Synonyms Talinum calycinum, Claytonia calycina Talinum thompsonii
Name authority (Engelmann) Kiger: Novon 11: 320. (2001) (N. D. Atwood & S. L. Welsh) Kiger: Novon 11: 321. (2001)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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