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chickweed, common chickweed, common starwort, common stitchwort, mouron des oiseaux

long-leaf starwort, long-leaf stitchwort, stellaire à longues feuilles

Habit Plants annual or winter annual, green, with slender taproot. Plants perennial, forming loose clumps, from elongate rhizomes.
Stems

decumbent or ascending, diffusely branched, 4-sided, 5–40 cm, with single line of hairs along each internode.

erect or straggling, branched, square, 10–35 cm, glabrous but angles minutely papillate-scabrid.

Leaves

petiolate (proximal) or ± sessile (distal);

blade usually green, ovate to broadly elliptic, 0.5–4 cm × 2–20 mm, base round to cuneate, margins entire, apex acute or shortly acuminate, ± glabrous or ciliate at base.

sessile;

blade green to yellowish green, never glaucous, linear to very narrowly elliptic, widest at or beyond middle, 0.8–4 cm × 1–3 mm, not coriaceous, base attenuate, apex acuminate to acute, glabrous to sparingly ciliate at base, margins minutely papillate-scabrid;

proximal leaves shorter and wider.

Inflorescences

terminal, 5–many-flowered cymes;

bracts ovate and shortly acuminate to lanceolate-acute, 1–40 mm, herbaceous.

terminal, widely divaricate, 2–many-flowered cymes;

bracts lanceolate, 1–5 mm, scarious, apex acuminate.

Pedicels

ascending, usually straight, deflexed at base in fruit, 3–40 mm, usually with line of hairs.

straight or somewhat arcuate, commonly 3–30 mm, glabrous or scabrous.

Flowers

2–5 mm diam.;

sepals 5, with obscure midrib, ovate-lanceolate, 4.5–5(–6) mm, margins narrow, scarious, apex obtuse, usually glandular-hairy;

petals absent or 5, 1–4 mm, shorter than to equaling sepals;

stamens 3–5(–8);

anthers red-violet;

styles 3, outwardly curved, becoming curled, 0.5–1 mm.

5–9 mm diam.;

sepals 5, obscurely 3-veined, ovate-elliptic, 2–4 mm, margins scarious, apex acute, glabrous;

petals 5, 2–3.5 mm, ± equaling sepals;

stamens 5–10;

styles 3, ascending, ca. 1 mm.

Capsules

green to straw colored, ovoid-oblong, 3–5 mm, somewhat longer than sepals, apex obtuse, opening by 6 valves;

carpophore absent.

blackish purple or straw colored, ovoid-conic, 3–6 mm, much longer than sepals, opening by 6 valves;

carpophore absent.

Seeds

reddish brown, broadly reniform to round, 0.9–1.3 mm diam., with obtuse, round, or flat-topped (broader than tall) tubercles.

brown, broadly reniform, 0.7–0.8 mm diam., slightly rugose.

2n

= 40, 42, 44.

= 26.

Stellaria media

Stellaria longifolia

Phenology Flowering year-round where climatic conditions permit. Flowering late spring–summer.
Habitat Cultivated ground, waste places, open woodlands Wet meadows and woodlands, marshes, muskegs, grassy roadsides, usually in circumneutral to calcareous sites
Elevation 0-2500 m (0-8200 ft) 0-2800 m (0-9200 ft)
Distribution
from FNA
AK; AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NL; NS; NT; ON; PE; QC; SK; YT; SPM; Greenland; Europe [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; AZ; CA; CO; CT; DC; DE; IA; ID; IL; IN; KY; MA; MD; ME; MI; MN; MO; MT; ND; NE; NH; NJ; NV; NY; OH; PA; RI; SC; SD; TN; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NL; NS; NT; ON; QC; SK; YT; SPM; Europe
[WildflowerSearch map]
[BONAP county map]
Discussion

Stellaria media, now a cosmopolitan weed, is a very polymorphic species, varying in size, habit, pubescence, petal length, stamen number, and seed size and surface detail.

The Stellaria media complex consists of three very similar and closely related species, S. media, S. neglecta, and S. pallida. They can almost always be distinguished by the characters given in the key, but in a few doubtful cases a chromosome count is desirable for positive identification. The problem arises from the considerable phenotypic variation which is displayed by S. media, and to a lesser extent by S. pallida. There is no evidence for gene exchange between these species. Stellaria pallida is autogamous and sometimes cleistogamous; S. media is both autogamous and occasionally cross-pollinated by flies; S. neglecta is usually cross-pollinated by flies but is self-compatible.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Stellaria longifolia often is confused with forms of S. longipes but differs in having leaves that are widest at or above the middle and in having the angles of the stem and/or the leaf margins minutely papillate-scabrid. The capsules can be either straw colored or black. Plants with black capsules have been named var. atrata.

Hybrids with Stellaria borealis subsp. borealis often occur; see note under that species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 5, p. 109. FNA vol. 5, p. 107.
Parent taxa Caryophyllaceae > subfam. Alsinoideae > Stellaria Caryophyllaceae > subfam. Alsinoideae > Stellaria
Sibling taxa
S. alaskana, S. alsine, S. americana, S. borealis, S. calycantha, S. corei, S. crassifolia, S. crispa, S. cuspidata, S. dicranoides, S. fontinalis, S. graminea, S. holostea, S. humifusa, S. irrigua, S. littoralis, S. longifolia, S. longipes, S. neglecta, S. nitens, S. obtusa, S. pallida, S. palustris, S. parva, S. porsildii, S. pubera, S. ruscifolia, S. umbellata
S. alaskana, S. alsine, S. americana, S. borealis, S. calycantha, S. corei, S. crassifolia, S. crispa, S. cuspidata, S. dicranoides, S. fontinalis, S. graminea, S. holostea, S. humifusa, S. irrigua, S. littoralis, S. longipes, S. media, S. neglecta, S. nitens, S. obtusa, S. pallida, S. palustris, S. parva, S. porsildii, S. pubera, S. ruscifolia, S. umbellata
Synonyms Alsine media, S. apetala, S. media var. procera Alsine longifolia, S. atrata, S. atrata var. eciliata, S. diffusa, S. longifolia var. atrata, S. longifolia var. eciliata
Name authority (Linnaeus) Villars: Hist. Pl. Dauphiné 3: 615. (1789) Muhlenberg ex Willdenow: Enum. Pl., 479. (1809)
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