Phemeranthus calycinus |
Phemeranthus aurantiacus |
|
---|---|---|
largeflower fameflower |
orange fameflower |
|
Habit | Plants to 4 dm; roots fleshily woody. | Plants to 5 dm; roots woody-tuberous. |
Stems | ascending or erect, simple or branching. |
erect, simple or branching, slender to stout, sometimes suffrutescent. |
Leaves | sessile; blade subterete, to 7 cm. |
subsessile; blade narrowly planate, linear to narrowly lanceolate or rarely oblanceolate, to 6 cm, base attenuate. |
Inflorescences | cymose, much overtopping leaves; peduncle scapelike, to 25 cm. |
flowers usually solitary, sometimes in 2–3-flowered cymules. |
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 deciduous, ovate, sometimes cuspidate, 5–10 mm; petals yellow or orange, sometimes reddish, rarely pinkish, obovate, 9–15(–25) mm; stamens usually 20–30; stigmas 3, linear; pedicel often recurving in fruit. |
Capsules | broadly ovoid, 6–7 mm. |
ovoid to globose, 4–7 mm. |
Seeds | without arcuate ridges, 1 mm. |
with arcuate ridges, 1.2(–1.7) mm. |
2n | = 24, 48. |
|
Phemeranthus calycinus |
Phemeranthus aurantiacus |
|
Phenology | Flowering May–Oct. | Flowering Apr–Nov. |
Habitat | Rocky or sandy soil, on or near outcrops | Washes, ravines, flats, dunes, slopes, benches, bluffs, ledges, often in grassland, scrub, or chaparral, sometimes along roadsides or in other disturbed sites, in sandy, gravelly, and rocky soils |
Elevation | 100-1200 m (300-3900 ft) | 0-2100 m (0-6900 ft) |
Distribution |
AR; CO; IL; KS; LA; MO; NE; NM; OK; TX
|
AZ; NM; TX; n Mexico
|
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.) |
A cladistic analysis of chloroplast ndhF sequence data (W. L. Applequist and R. S. Wallace 2001) indicated that Phemeranthus aurantiacus belongs in the same clade as Talinum paniculatum (Jacquin) Gaertner and the two other species of that genus that were sampled, rather than in a separate and rather distant clade containing P. mengesii, the only other species of Phemeranthus included in the study. The molecular evidence, together with the planate leaves and extended stem of P. aurantiacus, which are anomalous in Phemeranthus, suggest that perhaps this species should be restored to Talinum. However, in fruit and seed characters, the chief morphological bases on which Talinum and Phemeranthus are distinguished, P. aurantiacus clearly belongs in the latter. Talinum angustissimum often has been held separate from Phemeranthus aurantiacus (T. aurantiacum), but the supposed distinctions break down in a continuum of intergradation, the other extreme of which was described as T. whitei. The former extreme, centered in southern Arizona, has yellow petals, very narrow leaves, slender stems, and small, globose capsules; the latter, centered in southern Chihuahua and northern Durango, has orange to reddish petals, broad leaves, stout stems, and large, ovoid capsules. The name T. lineare Kunth, which properly applies to a species from central Mexico, has been misapplied to some collections of P. aurantiacus from Texas. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 4, p. 492. | FNA vol. 4, p. 491. |
Parent taxa | Portulacaceae > Phemeranthus | Portulacaceae > Phemeranthus |
Sibling taxa | ||
Synonyms | Talinum calycinum, Claytonia calycina | Talinum aurantiacum, Talinum angustissimum, Talinum aurantiacum var. angustissimum, Talinum whitei |
Name authority | (Engelmann) Kiger: Novon 11: 320. (2001) | (Engelmann) Kiger: Novon 11: 319. (2001) |
Web links |