Paronychia sessiliflora

Nuttall

Gen. N. Amer. Pl. 1: 160. 1818.

Common names: Creeping nailwort
IllustratedEndemic
Treatment appears in FNA Volume 5. Treatment on page 42. Mentioned on page 32.

Plants perennial, densely cespitose and mat-forming; caudex branched, woody. Stems erect to ascending, branched proximally, 5–25 cm, hirtellous. Leaves: stipules lanceolate to subulate, 2–3 mm, apex long-acuminate, often deeply cleft; blade linear-subulate, 4–7.5 × 0.5–0.8 mm, leathery, apex acute or shortly cuspidate-mucronate, very finely puberulent to glabrous. Cymes terminal, 3–6-flowered, congested, or flowers solitary. Flowers 5-merous, ± ovoid, with enlarged hypanthium and calyx narrowing distally, 3.6–5 mm, moderately pubescent with silky to stiff, antrorse to somewhat spreading hairs; sepals green to redbrown, midrib and lateral pair of veins prominent, lanceolate-oblong, 1.5–2 mm, leathery, margins whitish to translucent, 0.1–0.2 mm wide, scarious, apex terminated by awn, hood ± obscure, narrowly rounded, awn erect to somewhat spreading, 1–1.5 (–2) mm, narrowly conic in proximal 1/2 with white, scabrous spine; staminodes filiform, 0.7–1 mm; style 1, cleft in distal 1/5, 1.4–1.5 mm. Utricles ovoid-oblong, 1.3–1.4 mm, densely pubescent in distal 1/2.


Phenology: Flowering summer.
Habitat: Dry, stony hillsides, summits, and sandstone mesas
Elevation: 700-3100 m

Distribution

V5 81-distribution-map.gif

Alta., Sask., Colo., Mont., Nebr., Nev., N.Mex., N.Dak., Okla., Tex., Utah, Wyo.

Discussion

Selected References

None.

Lower Taxa

None.

"narrowing" is not a number."/10" is not declared as a valid unit of measurement for this property. "/10" is not declared as a valid unit of measurement for this property.

... more about "Paronychia sessiliflora"
awned +  and hooded +
ascending +  and slightly descending +
very finely puberulent +  and glabrous +
cuspidate-mucronate;acute;long-acuminate +
Ronald L. Hartman +, John W. Thieret +  and Richard K. Rabeler +
Nuttall +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
spreading +  and erect to somewhat +
prominent +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
stipulate +  and petiolate +
not +  and connate +
often +  and needlelike +
0.4 cm4 mm <br />0.004 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
linear-subulate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
reduced +
Creeping nailwort +
3-6-flowered +
dish--shaped +
expanded +
Alta. +, Sask. +, Colo. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Dak. +, Okla. +, Tex. +, Utah +  and Wyo. +
700-3100 m +
peripheral +
connate +  and distinct +
unisexual +  and bisexual +
0.36 cm3.6 mm <br />0.0036 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
sometimes +  and indehiscent +
stalked +  and simple +
Dry, stony hillsides, summits, and sandstone mesas +
straight +
spreading +  and antrorse to somewhat +
rounded +
tapering +  and cup-shaped +
sessile +  and petiolate +
adjacent +  and opposite +
connate +
all +  and distalmost +
whitish +  and translucent +
fimbriate +  and entire +
0.1mm +  and 0.2mm +
lanceolate-oblong +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
fugacious +
4 +  and 5 +
Flowering summer. +
Gen. N. Amer. Pl. +
compressed +, subglobose +  and ellipsoid +
green +  and redbrown +
persistent +
subulate;linear-oblong lanceolate spatulate or ovate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Illustrated +  and Endemic +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (?) +  and 0.1 cm1 mm <br />0.001 m <br /> (?) +
erect;ascending +
hirtellous +
terete;angular +
5 cm50 mm <br />0.05 m <br /> (25 cm250 mm <br />0.25 m <br />) +
subterminal +
[50 +  and 2 +
papillate +
silvery +  and white +
lanceolate +  and subulate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
connate +  and distinct +
subcapitate +  and filiform +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Anychia +, Anychiastrum +, Gastronychia +, Gibbesia +, Nyachia +, Odontonychia +  and Siphonychia +
Paronychia sessiliflora +
Paronychia +
species +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
divided +
ovoid-oblong +
0.13 cm1.3 mm <br />0.0013 m <br /> (?) +  and 0.14 cm1.4 mm <br />0.0014 m <br /> (?) +
membranous +
8 (?) +  and 10 (?) +
not rhizomatous +  and taprooted +
plant +, mat-forming +  and cespitose +
pubescence of simple hairs or stalked glands +  and glabrous +
9 +, 8 +  and 7 +