Cerastium glomeratum |
Cerastium nutans |
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céraiste aggloméré, large mouse ears, sticky chickweed, sticky mouse-ear chickweed |
common chickweed, céraiste penché, longstem chickweed, nodding chickweed, nodding mouse-ear chickweed |
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Habit | Plants annual, with slender taproots. | Plants annual, slender, finely glandular-pubescent (often perennial and tomentose in var. obtectum), with slender taproot. | ||||
Stems | erect or ascending, branched, 5–45 cm, hairy, glandular at least distally, rarely eglandular; small axillary tufts of leaves absent. |
erect, simple or branched at or near base, sometimes with straggling, nonflowering basal shoots, 10–50 cm, softly pubescent, often with a few long, flexuous, woolly hairs at proximal nodes, glandular and somewhat viscid distally; small axillary tufts of leaves usually absent. |
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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. |
marcescent or not, sessile; blade oblanceolate to spatulate in proximal leaves, becoming lanceolate to linear-lanceolate in distal leaves, occasionally elliptic, 10–60 × 3–15 mm, apex acuminate to acute, softly pubescent and glandular, sometimes tomentose. |
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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. |
rather open, 3–21(–40)-flowered cymes, ultimately widely branched; bracts herbaceous, lanceolate, glandular-pubescent. |
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Pedicels | erect to spreading, often arcuate distally, 0.1–5 mm, shorter than capsule, glandular-pubescent. |
ascending, sharply deflexed at apex in fruit, 5–20(–35) mm, usually 1–3 times as long as sepals in flower, elongating to 5 times as long as sepals in fruit, longer than capsules, glandular-pubescent and viscid. |
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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. |
sepals ovate-lanceolate, 4–6 mm, outer sepals herbaceous or with narrow margins, inner with margins ca. as wide as herbaceous center, apex broadly acute to obtuse, glandular-puberulent, hairs shorter than sepal tips; petals oblanceolate, sometimes absent, 3–6(–8) mm, shorter to 1.5 times longer than sepals, apex 2-fid; stamens 10; styles 5. |
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Capsules | narrowly cylindric, curved, 7–10 mm; teeth 10, erect, margins convolute. |
cylindric, curved, (9–)10–12(–13) mm, 2–3 times as long as sepals; teeth 10, erect, margins convolute. |
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Seeds | pale brown, 0.5–0.6 mm, finely tuberculate; testa inflated or not. |
golden brown, 0.5–0.8 mm diam., shallowly tuberculate; testa not inflated. |
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2n | = 72. |
= 34, 36. |
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Cerastium glomeratum |
Cerastium nutans |
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Phenology | Flowering throughout growing season. | |||||
Habitat | Arable land, waste places, roadsides | |||||
Elevation | 0-1800 m (0-5900 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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AK; AL; AR; AZ; CO; CT; DC; DE; GA; IA; ID; IL; IN; KS; KY; MA; MD; MI; MN; MO; MS; MT; NC; ND; NE; NJ; NM; NY; OH; OR; PA; SD; TN; TX; VA; VT; WA; WI; WV; WY; AB; BC; MB; NT; ON; QC; SK; YT; Mexico
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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.) |
Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 5, p. 87. | FNA vol. 5, p. 87. | ||||
Parent taxa | Caryophyllaceae > subfam. Alsinoideae > Cerastium | Caryophyllaceae > subfam. Alsinoideae > Cerastium | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | C. acutatum, C. fulvum | |||||
Name authority | Thuillier: Fl. Env. Paris ed. 2, 226. (1799) | Rafinesque: Précis Découv. Somiol., 36. (1814) | ||||
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