Stellaria neglecta

Weihe in M. J. Bluff et al.

in M. J. Bluff et al., Comp. Fl. German. 1: 560. 1825.

Common names: Greater chickweed
Introduced
Synonyms: Alsine neglecta (Weihe) Á. Löve & D. Löve Stellaria media subsp. neglecta (Weihe) Murbeck
Treatment appears in FNA Volume 5. Treatment on page 110. Mentioned on page 97, 109.

Plants annual or winter-annual, from slender taproot. Stems decumbent proximally, ascending distally, diffusely branched, 4-angled, to 80 cm, with single line of hairs along each internode. Leaves petiolate (proximal and those on sterile shoots) or sessile (distal and mid-stem); blade ovate to broadly elliptic, 0.5–4 cm × 2–18 mm, base round to cuneate, margins entire with few cilia at base, thin, apex acute to short-acuminate, ± glabrous. Inflorescences terminal, 9–many-flowered cymes; bracts ovate to lanceolate, 3–25 mm, reduced distally, herbaceous, sparsely ciliate on margins and underside. Pedicels erect, often becoming deflexed, 5–40 mm, pubescence a single line of hairs. Flowers 5–7 mm diam.; sepals 5, veins obscure, lanceolate, 5–6.5 mm, margins narrow, membranous, apex acute, pubescent; petals 5 (rarely absent), 2–5 mm, shorter than or equaling sepals; stamens 8–10; styles 3, ascending, outwardly curved, 0.5–1 mm. Capsules green to straw colored, ovoid-oblong, 5–7 mm, ca. equaling sepals, apex obtuse, opening by 6 slightly recurved valves; caropohore absent. Seeds very dark-brown when mature, round, 1.1–1.7 mm diam., tuberculate; tubercles conic, taller than broad, apex acute. 2n = 22.


Phenology: Flowering spring.
Habitat: Hedge banks, open woodlands, along streams, semishaded grassy places
Elevation: 100-200 m

Distribution

V5 228-distribution-map.gif

Introduced; Ark., Calif., Ky., La., Md., N.C., Okla., Tenn., Europe

Discussion

Formerly, Stellaria neglecta was rare in North America, but during the last ten to 15 years it has spread rapidly and become weedy. It is very like larger forms of S. media (see note under that species), but usually differs in having larger flowers, sepals, and seeds; having a larger number of stamens; and having seeds with acute conic tubercles. Flowers are self-compatible but usually are pollinated by flies.

Selected References

None.

Lower Taxa

None.
... more about "Stellaria neglecta"
perigynous +  and hypogynous +
pubescent +  and glabrous +
acute;obtuse;acute;acute;short-acuminate +
John K. Morton +
Weihe in M. J. Bluff et al. +
round;cuneate +
Laciniate (?) +, Emarginate (?) +, Jagged (?) +, 2-fid (?) +  and Entire (?) +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
ovate +  and broadly elliptic +
not +  and succulent +
0.2 cm2 mm <br />0.002 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
ovate +  and lanceolate +
reduced +
0.3 cm3 mm <br />0.003 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
green;straw colored +
ascending;recurved +
10 +, 8 +  and 4 +
ovoid-oblong +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Greater chickweed +
9-many-flowered +
dish--shaped +
expanded +
Ark. +, Calif. +, Ky. +, La. +, Md. +, N.C. +, Okla. +, Tenn. +  and Europe +
100-200 m +
straight +  and curved +
central +  and peripheral +
0.5 cm5 mm <br />0.005 m <br /> (?) +  and 0.7 cm7 mm <br />0.007 m <br /> (?) +
inconspicuous +
stalked +  and simple +
Hedge banks, open woodlands, along streams, semishaded grassy places +
sessile +  and petiolate +
connate +
membranous +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
deflexed;erect +
pubescent +  and glabrous +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
perigynous +  and hypogynous +
fugacious +
not clawed +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering spring. +
in M. J. Bluff et al., Comp. Fl. German. +
dark-brown +
1.1mm;1.7mm +
tuberculate +
red +, purple-tinged +  and green +
persistent +
distinct +
lanceolate;ovate-triangular +
0.2 cm2 mm <br />0.002 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Introduced +
8 +  and 10 +
4-angled +
0 cm0 mm <br />0 m <br /> (80 cm800 mm <br />0.8 m <br />) +
subterminal +  and terminal +
[30 +  and 3 +
papillate +
distinct +
capitate +  and clavate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Alsine neglecta +  and Stellaria media subsp. neglecta +
rooting +  and rhizomatous +
Stellaria neglecta +
Stellaria +
species +
divided +
taller than broad +
10 +  and 8 +
lanceolate +
0.5 cm5 mm <br />0.005 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
rhizomatous +  and taprooted +
winter-annual +  and annual +
pubescence of simple hairs or stalked glands +  and glabrous +
15 +, 13 +, 12 +, 11 +  and 10 +