Moehringia trinervia

(Linnaeus) Clairville

Man. Herbor. Suisse, 150. 1811.

Common names: Three-nerved sandwort
Introduced
Basionym: Arenaria trinervia Linnaeus Sp. Pl. 1: 423. 1753
Treatment appears in FNA Volume 5. Treatment on page 72. Mentioned on page 71.

Plants annual (or short-lived perennial?), not rhizomatous. Stems prostrate or ascending, branched, angled or grooved, 13–19 cm, retrorsely pubescent in 2 lines. Leaves petiolate; petiole 1–4 mm; blade 3 (–7) -veined, ovate to broadly ovate, 5–18 × 4–8 mm, margins ciliate, apex acute. Inflorescences 3–10 (–15) -flowered; bracts 1–15 mm, proximal foliaceous, distal much smaller, scarious. Pedicels ascending to erect, recurved in fruit, 4–15 (–22) mm. Flowers: sepals 4 or 5, midrib keeled, ovatelanceolate, 2–4 mm, margins broad, apex acuminate; petals 4 or 5, ca. 1.3 mm, ca. 1/2 as long as sepals. Capsules ovoid, 2–2.5 mm, shorter than sepals. Seeds reniform, 1 mm, smooth. 2n = 24 (Europe).


Phenology: Flowering early summer.
Habitat: Trails in forests
Elevation: 400 m

Distribution

V5 153-distribution-map.gif

Introduced; Ohio, Eurasia

Discussion

Moehringia trinervia was collected near Cleveland in 1990 on property that formerly was a resort community (R. K. Rabeler and A. W. Cusick 1994). It closely resembles Stellaria media; the multiveined, ciliate leaves, retrorse pubescence in two lines on the stems, broadly scarious sepals, capsules shorter than the sepals, and smooth, appendaged seeds distinguish it from S. media.

Selected References

None.

Lower Taxa

None.
... more about "Moehringia trinervia"
Richard K. Rabeler +  and Ronald L. Hartman +
(Linnaeus) Clairville +
Arenaria trinervia +
Laciniate (?) +, Emarginate (?) +, Jagged (?) +, 2-fid (?) +  and Entire (?) +
3(-7)-veined +
0.5 cm5 mm <br />0.005 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
ovate +  and broadly ovate +
4mm;8mm +
smaller +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Three-nerved sandwort +
dish--shaped +
expanded +
Ohio +  and Eurasia +
straight +  and curved +
central +  and peripheral +
inconspicuous +
unisexual +  and bisexual +
stalked +  and simple +
Trails in forests +
disc--shaped +  and dish +
3-10(-15)-flowered +
axillary +  and terminal +
not connate +
ovatelanceolate +  and keeled +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
3 times width of filament +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
1.5 cm15 mm <br />0.015 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
recurved;ascending;erect +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
fugacious +
1.3 cm13 mm <br />0.013 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering early summer. +
Man. Herbor. Suisse, +
smooth +  and minutely tuberculate +
reniform +
persistent +
distinct +
5 +  and 4 +
ovate;obovate +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Introduced +
8 (?) +  and 10 (?) +
grooved +  and branched +
ascending;prostrate +
13 cm130 mm <br />0.13 m <br /> (19 cm190 mm <br />0.19 m <br />) +
[30 +  and 3 +
papillate +
distinct +
filiform +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
Moehringia trinervia +
Moehringia +
species +
divided +
10 +  and 8 +
pubescence of simple hairs or stalked glands +  and glabrous +