Phemeranthus longipes

(Wooton & Standley) Kiger

Novon 11: 320. 2001.

Basionym: Talinum longipes Wooton & Standley Contr. U.S. Natl. Herb. 16: 120. 1913
Treatment appears in FNA Volume 4. Treatment on page 492. Mentioned on page 490, 493.

Plants to 1.5 dm; roots slender, elongate, tortuous, woody. Stems ± erect, simple or branching, sometimes bearing persistent midribs of dead leaves basally, suffrutescent. Leaves sessile; blade terete, 1–2.5 cm. Inflorescences cymose, much overtopping leaves; peduncle scapelike, to 12 cm. Flowers: sepals deciduous, often pinkish, orbiculate to suborbiculate, 2–3 mm; petals pink, obovate, 4–5 mm; stamens 10; stigmas 3, linear. Capsules subglobose, 3.5 mm. Seeds with arcuate ridges, 1 mm.


Phenology: Flowering Jul–Sep.
Habitat: Open areas in canyons and on slopes, and crests
Elevation: 1600-2000 m

Distribution

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N.Mex., Tex., n Mexico (Tamaulipas)

Discussion

Phemeranthus longipes is easily confused with smaller specimens of P. parviflorus, which it resembles in general aspect; the two are most readily distinguished by seed surface, sepal shape, root character, and stamen number. The presence of spinelike persistent leaf midribs at the stem bases has been regarded as a diagnostic feature of P. longipes; not all plants exhibit this condition, however, and some of P. parviflorus approach it closely.

Selected References

None.

Lower Taxa

None.
... more about "Phemeranthus longipes"
Robert W. Kiger +
(Wooton & Standley) Kiger +
membranous to chartaceous +
Talinum longipes +
occasionally dentate;crisped +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
succulent +
0.1 cm1 mm <br />0.001 m <br /> (?) +  and 0.3 cm3 mm <br />0.003 m <br /> (?) +
subglobose +
3.5 cm35 mm <br />0.035 m <br /> (?) +
N.Mex. +, Tex. +  and n Mexico (Tamaulipas) +
1600-2000 m +
not separating +
differentiated +
not separating +
differentiated +
pedicellate +, many-flowered +  and secund +
cleistogamous +
3[-5]-carpelled +
Open areas in canyons and on slopes, and crests +
paniculate +  and racemose +
axillary +, terminal +  and lateral +
subrosulate +, subopposite +  and alternate +
persistent +
plurilocular +
short;elongate +
0 cm0 mm <br />0 m <br /> (12 cm120 mm <br />0.12 m <br />) +
gray +  and pale white +
fugacious +
connate +  and distinct +
obovate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering Jul–Sep. +
tortuous +
elongate +
slender +
estrophiolate +
brown +  and black +
sculptured +  and smooth +
circular-reniform +  and compressed +
1 cm10 mm <br />0.01 m <br /> (?) +
deciduous +
orbiculate;suborbiculate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
with filaments +  and distinct +
branching +  and simple +
suffrutescent +
Talinum sect. Phemeranthus +
Phemeranthus longipes +
Phemeranthus +
species +
deciduous +
fleshy +  and succulent +