Paronychia setacea

Torrey & A. Gray

Fl. N. Amer. 1: 170. 1838.

Common names: Bristle nailwort
Endemic
Synonyms: Paronychia lundellorum B. L. Turner Paronychia setacea var. longibracteata Chaudhri
Treatment appears in FNA Volume 5. Treatment on page 42. Mentioned on page 32.

Plants annual, biennial, or perennial; taproot filiform to slender. Stems erect to ascending, much-branched distally, 5–20 cm, finely pubescent to puberulent. Leaves: stipules lanceolate, 3–8 mm, apex acuminate, entire; blade linear, 5–20 × 0.3–1 mm, leathery, apex minutely cuspidate, glabrous. Cymes terminal and lateral, 5–20+-flowered, dichasial and rather diffuse, forming clusters 3–15 mm wide. Flowers 5-merous, ± short-campanulate, with enlarged hypanthium and calyx widening distally, 2.4–3.2 mm, moderately pubescent proximately with antrorsely appressed to spreading hairs; sepals green to tan, midrib and lateral pair of veins absent to evident, oblong, 1.2–1.3 mm, leathery to rigid, margins whitish to translucent, 0.05–0.1 mm wide, scarious, apex terminated by awn, hood ± obscure, narrowly rounded, awn widely divergent, 0.6–1.3 mm, broadly conic in proximal 1/3 with white to yellowish, scabrous spine; staminodes subulate, 0.6–0.7 mm; style 1, cleft in distal 1/2, 0.4–0.6 mm. Utricles ovoid-oblong, 1 mm, smooth, glabrous. 2n = 64.


Phenology: Flowering spring–fall.
Habitat: Limestone barrens, gravelly or sandy slopes and grasslands
Elevation: 30-200 m

Discussion

We could not distinguish Paronychia lundellorum from P. setacea based on features that Turner used for differentiation, nor did we discover any other discriminating characters. The former was described as perennial (versus annual for the latter) and as having “decided pedicellate” (versus sessile) and longer flowers. Recent data (W. Carr, pers. comm.) indicate that it does bloom in the first year. Furthermore, we have observed that the pedicel character is inconsistent and the flower lengths overlap extensively. Further study of the allopatric populations named P. lundellorum is warranted.

Selected References

None.

Lower Taxa

None.

"widening" 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 setacea"
awned +  and hooded +
cuspidate +  and entire +
ascending +  and slightly descending +
acuminate +
Ronald L. Hartman +, John W. Thieret +  and Richard K. Rabeler +
Torrey & A. Gray +
prominent +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
stipulate +  and petiolate +
not +  and connate +
often +  and needlelike +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
spatulate +, oblanceolate +  and linear to elliptic +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
reduced +
Bristle nailwort +
dichasial +  and 5-20+-flowered +
3mm;15mm +
dish--shaped +
expanded +
30-200 m +
peripheral +
connate +  and distinct +
unisexual +  and bisexual +
short-campanulate +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
sometimes +  and indehiscent +
stalked +  and simple +
Limestone barrens, gravelly or sandy slopes and grasslands +
straight +
antrorsely appressed +  and spreading +
rounded +
tapering +  and cup-shaped +
sessile +  and petiolate +
adjacent +  and opposite +
connate +
all +  and distalmost +
whitish +  and translucent +
fimbriate +  and entire +
0.05mm +  and 0.1mm +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
leathery +  and rigid +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
fugacious +
4 +  and 5 +
Flowering spring–fall. +
Fl. N. Amer. +
compressed +, subglobose +  and ellipsoid +
green +  and tan +
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 />) +
white +  and yellowish +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (?) +  and 0.07 cm0.7 mm <br />7.0e-4 m <br /> (?) +
much-branched +
erect;ascending +
finely pubescent +  and puberulent +
terete;angular +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
subterminal +
[50 +  and 2 +
papillate +
silvery +  and white +
lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
connate +  and distinct +
subcapitate +  and filiform +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Paronychia lundellorum +  and Paronychia setacea var. longibracteata +
Paronychia setacea +
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 +
1 cm10 mm <br />0.01 m <br /> (?) +
membranous +
8 (?) +  and 10 (?) +
not rhizomatous +  and taprooted +
perennial +, biennial +  and annual +
pubescence of simple hairs or stalked glands +  and glabrous +
9 +, 8 +  and 7 +