Arenaria benthamii

Fenzl ex Torrey & A. Gray

Fl. N. Amer. 1: 675. 1840.

Common names: Hilly sandwort
Illustrated
Treatment appears in FNA Volume 5. Treatment on page 52. Mentioned on page 51, 54.
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Plants annual. Taproots filiform. Stems 1–40+, erect to ascending, branching, green, 10–30 (–50) cm; internodes ± terete, mostly 1–10 times as long as leaves, dull, retrosely puberulent in 2 lines. Leaves usually connate proximally, with scarious sheath 0.2–0.4 mm, petiolate (proximal leaves) or sessile; petiole 2–4 mm; blade 1-veined, vein ± weak abaxially, ovate (petiolate blades) or elliptic-lanceolate to oblanceolate, 5–15 (–20) × 2–4 mm, herbaceous, margins undulate, scarious, shiny, sparsely ciliate especially proximally, apex acute to apiculate or cuspidate, often pustulate, glabrous; axillary leaf clusters absent. Inflorescences terminal, open, leafy, 3–50+-flowered cymes. Pedicels erect to reflexed in fruit, 10–40 mm, glabrous. Flowers: sepals green, 1-veined, vein obscure or prominent proximally, not keeled, elliptic to broadly ovate (herbaceous portion light green, ovate), 2–3.5 mm, to 4.5 mm in fruit, apex acute to acuminate, often pustulate, glabrous; petals elliptic, 1.5–3 mm, 1/2–3/4 times as long as sepals, apex obtuse. Capsules loosely to tightly enclosed by calyx, ovoid, 3–4 mm, 11/5–2 times as long as sepals. Seeds 20–30, ashy brown, broadly reniform, compressed, 0.5–0.6 mm, dull, minutely or prominently rounded-tuberculate.


Phenology: Flowering late spring.
Habitat: Open woodlands, limestone slopes and outcrops
Elevation: 0-400 m

Distribution

V5 101-distribution-map.gif

La., N.Mex., Okla., Tex., Mexico (Coahuila), Mexico (Nuevo León)

Discussion

Selected References

None.

Lower Taxa

None.

"/5-2timesaslongassepals" is not declared as a valid unit of measurement for this property."-10timesaslongasleaves" is not declared as a valid unit of measurement for this property."/2-3/4timesaslongassepals" is not declared as a valid unit of measurement for this property.

... more about "Arenaria benthamii"
cuspidate +  and apiculate +
pustulate +
Ronald L. Hartman +, Richard K. Rabeler +  and Frederick H. Utech +
Fenzl ex Torrey & A. Gray +
Laciniate (?) +, Emarginate (?) +, Jagged (?) +, 2-fid (?) +  and Entire (?) +
linear-lanceolate +  and usually elliptic +
smaller +
herbaceous +  and scarious +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Hilly sandwort +
3-50+-flowered +
dish--shaped +
expanded +
La. +, N.Mex. +, Okla. +, Tex. +, Mexico (Coahuila) +  and Mexico (Nuevo León) +
0-400 m +
straight +  and curved +
central +  and peripheral +
inconspicuous +
unisexual +  and bisexual +
stalked +  and simple +
Open woodlands, limestone slopes and outcrops +
disc--shaped +  and dish +
leafy +  and open +
sessile +  and petiolate +
connate +
undulate +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
erect;reflexed +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
fugacious +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering late spring. +
Fl. N. Amer. +
rounded-tuberculate +
compressed +  and reniform +
persistent +
connate +  and distinct +
lanceolate;broadly ovate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
Illustrated +
erect;ascending +
terete;ellipsoid +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
[30 +  and 3 +
papillate +
distinct +
filiform +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Spergulastrum +
Arenaria benthamii +
Arenaria +
species +
ascending;recurved +
divided +
10 +  and 8 +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
prominent +  and obscure +
0 cm0 mm <br />0 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
2mm;4mm +
rhizomatous +  and taprooted +
pubescence of simple hairs or stalked glands +  and glabrous +
11 +, 10 +, 8 +  and [7 +