Cerastium glomeratum |
Cerastium bialynickii |
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céraiste aggloméré, large mouse ears, sticky chickweed, sticky mouse-ear chickweed |
Bialynick's mouse-ear chickweed, mouse-ear chickweed |
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Habit | Plants annual, with slender taproots. | Plants perennial, compact, pulvinate, taprooted. |
Stems | erect or ascending, branched, 5–45 cm, hairy, glandular at least distally, rarely eglandular; small axillary tufts of leaves absent. |
ascending, much-branched at base, 2–10 cm, densely hispid-pubescent, hairs patent, fuscous, multicellular; internodes short; small axillary tufts of leaves 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. |
dense below the inflorescence; blade broadly lanceolate, elliptic-lanceolate to ovate or obovate, 5–10 × 1.5–4 mm, thick and ± fleshy, apex broadly acute to obtuse, hispid, hairs fuscous, multicellular, long; proximal leaves marcescent, sometimes subglabrous. |
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. |
often 1-flowered and compact, sometimes 2–3-flowered cymes, hairs patent, dense, fuscous, eglandular and glandular; bracts lanceolate, with or without narrow, scarious margins, densely pubescent, often glandular. |
Pedicels | erect to spreading, often arcuate distally, 0.1–5 mm, shorter than capsule, glandular-pubescent. |
straight or ± angled at base and/or apex, 5–12 mm, 1–2 times as long as sepals, densely pubescent with long, eglandular and short, glandular hairs. |
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 usually purplish, 5–6(–7) mm, herbaceous center narrowly lanceolate, margins broad, making apex obtuse, densely pubescent, hairs long, stiff, glandular and eglandular; petals oblanceolate, 7–9 mm, 1–1.5 times as long as sepals, apex 2-fid; stamens 10; styles 5. |
Capsules | narrowly cylindric, curved, 7–10 mm; teeth 10, erect, margins convolute. |
cylindric, slightly curved, 9–12 mm, 1.5–2 times as long as sepals; teeth 10, erect, margins convolute. |
Seeds | pale brown, 0.5–0.6 mm, finely tuberculate; testa inflated or not. |
brown, 0.8–1 mm, tuberculate; testa not inflated, tightly enclosing seed. |
2n | = 72. |
= 108. |
Cerastium glomeratum |
Cerastium bialynickii |
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Phenology | Flowering throughout growing season. | Flowering summer. |
Habitat | Arable land, waste places, roadsides | Tundra, rocky exposures, screes, nunataks in the high arctic |
Elevation | 0-1800 m (0-5900 ft) | 0-1300 m (0-4300 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; NT; NU; Greenland; Eurasia (Russian Far East, arctic Siberia and associated islands, Spitzbergen) |
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.) |
Cerastium bialynickii previously was included in C. arcticum but is very different from that species, being a small, compact plant with a dense, hispid, fuscous pubescence, a small calyx with the broad, scarious margins making it obtuse, and small flowers, capsules, and seeds. Cerastium bialynickii resembles small compact plants of C. beeringianum but it differs in calyx shape and chromosome number. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 5, p. 87. | FNA vol. 5, p. 82. |
Parent taxa | Caryophyllaceae > subfam. Alsinoideae > Cerastium | Caryophyllaceae > subfam. Alsinoideae > Cerastium |
Sibling taxa | ||
Synonyms | C. acutatum, C. fulvum | C. arcticum var. sordidum |
Name authority | Thuillier: Fl. Env. Paris ed. 2, 226. (1799) | Tolmatchew: Trudy Bot. Muz. 21: 81, fig. 1. (1927) |
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