Cerastium glomeratum |
Cerastium dubium |
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céraiste aggloméré, large mouse ears, sticky chickweed, sticky mouse-ear chickweed |
anomalous mouse-ear chickweed, doubtful chickweed, three-style chickweed |
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Habit | Plants annual, with slender taproots. | Plants annual, taprooted. |
Stems | erect or ascending, branched, 5–45 cm, hairy, glandular at least distally, rarely eglandular; small axillary tufts of leaves absent. |
erect, many-branched from base, 10–40 cm, minutely viscid-glandular; small axillary tufts of leaves usually absent. |
Leaves | not marcescent, ± sessile; blade 5–20(–30) × 2–8(–15) mm, apex apiculate, covered with spreading, white, long hairs; basal with blade oblanceolate or obovate, narrowed proximally, sometimes spatulate; cauline with blade broadly ovate or elliptic-ovate. |
not marcescent, distal sessile, proximal spatulate; blade linear or linear- lanceolate to linear-oblong, 10–30 × 1–4 mm, apex obtuse to subacute, glabrous or sparsely and minutely viscid-glandular. |
Inflorescences | 3–50-flowered, aggregated into dense, cymose clusters or in more-open dichasia; bracts: proximal herbaceous, distal lanceolate, apex acute, with long, mainly eglandular hairs. |
lax, 3–21(–30)-flowered cymes; bracts narrowly lanceolate, glandular-pubescent. |
Pedicels | erect to spreading, often arcuate distally, 0.1–5 mm, shorter than capsule, glandular-pubescent. |
erect, slender, 2–15 mm, 0.5–3 times as long as sepals, glandular-puberulent Flowers: sepals ovate-lanceolate, 5–6 mm, margins narrow, apex acute to obtuse, minutely viscid-glandular; petals oblanceolate, 5–8 mm, 1.5 times as long as sepals, apex 2-fid; stamens 10; styles 3(–4). |
Flowers | sepals green, rarely dark-red tipped, lanceolate, 4–5 mm, margins narrow, apex very acute, usually with glandular hairs as well as long white hairs usually extending beyond apex; petals oblanceolate, 3–5 mm, rarely absent, usually shorter than sepals, apex deeply 2-fid; stamens 10; styles 5. |
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Capsules | narrowly cylindric, curved, 7–10 mm; teeth 10, erect, margins convolute. |
oblong-ovoid, straight, 8–11 mm, ca. 2 times as long as sepals; teeth 6, occasionally 8, erect to spreading, margins convolute. |
Seeds | pale brown, 0.5–0.6 mm, finely tuberculate; testa inflated or not. |
pale brown, ovate, 0.6 mm diam., tuberculate; testa not inflated. |
2n | = 72. |
= 36, 38. |
Cerastium glomeratum |
Cerastium dubium |
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Phenology | Flowering throughout growing season. | Flowering spring. |
Habitat | Arable land, waste places, roadsides | Alien weed of cultivated land |
Elevation | 0-1800 m (0-5900 ft) | 200-800 m (700-2600 ft) |
Distribution |
AK; AL; AR; AZ; CA; CT; DC; DE; FL; GA; ID; IL; IN; KS; KY; LA; MA; MD; MI; MO; MS; MT; NC; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; TN; TX; VA; WA; WV; BC; NF; NS; ON; QC; YT; Europe [Introduced in North America; introduced and common in Mexico]
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AR; ID; IL; IN; KS; KY; MS; OH; OR; TN; VA; WA; s Europe; Asia [Introduced in North America]
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Discussion | Cerastium glomeratum often has been reported as C. viscosum Linneaus, an ambiguous name; see discussion under the genus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
First collected in North America in 1966 in Washington, Cerastium dubium has now been gathered from many widely scattered sites, and appears to be spreading rapidly. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 5, p. 87. | FNA vol. 5, p. 85. |
Parent taxa | Caryophyllaceae > subfam. Alsinoideae > Cerastium | Caryophyllaceae > subfam. Alsinoideae > Cerastium |
Sibling taxa | ||
Synonyms | C. acutatum, C. fulvum | Stellaria dubia, C. anomalum, Dichodon viscidum |
Name authority | Thuillier: Fl. Env. Paris ed. 2, 226. (1799) | (Bastard) Guépin: Fl. Maine et Loire ed. 2, 1: 267. (1838) |
Web links |
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