The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

céraiste des champs, field chickweed, field mouse-ear chickweed, field or prairie mouse-ear chickweed, meadow chickweed, starry cerastium

mouse-ear chickweed, Newfoundland mouse-ear chickweed

Habit Plants perennial, clumped and taprooted, or mat-forming and long-creeping rhizomatous. Plants perennial, tufted, rhizomatous.
Stems

flowering shoots often decumbent proximally, 5–20(–30) cm, glandular-pubescent distally, pilose-subglabrous, deflexed or spreading proximally;

non-flowering shoots present; small tufts of leaves present in axils of proximal leaves.

loosely ascending to suberect, branched, very leafy, 10–15 cm, pubescence short, dense, glandular; small axillary tufts of leaves usually absent.

Leaves

not marcescent, sessile, ± spatulate proximally;

blade linear-lanceolate to lanceolate or narrowly oblong, 4–30 × 0.5–6 mm, apex acute, rarely obtuse, subglabrous to softly pubescent, sometimes glandular.

tending to be marcescent, sessile but spatulate proximally;

blade elliptic-oblong, 5–14 × 1.5–3.5 mm, apex obtuse, densely glandular-hirsute.

Inflorescences

lax, 1–20-flowered cymes, pubescence short, glandular;

bracts lanceolate, margins narrow, scarious, glandular-pubescent.

lax, 1–3-flowered cymes;

bracts ovate-lanceolate, margins very narrow, scarious, glandular-pubescent.

Pedicels

curved just below calyx, 5–30 mm, 1–6 times as long as sepals, glandular-pubescent.

mostly erect, slender, 10–25 mm, 1–4 times as long as sepals, densely glandular-pubescent.

Flowers

sepals narrowly lanceolate to lance-elliptic, 3.5–7 mm, margins narrow, softly pubescent;

petals obovate, 7.5–12.5 mm, ca. 2 times as long as sepals, apex 2-fid;

stamens 10;

anthers 0.8–1.1 mm;

styles 5.

sepals ovate-oblong, 5.5–6.5 mm, elongating to 6–7 mm in fruit, margins broad, apex obtuse, glandular-pubescent;

petals narrowly oblanceolate, 7–10 mm, 1.5–2 times as long as sepals, apex 2-fid;

stamens 10;

styles 5.

Capsules

cylindric, curved, 7.5–11.5 × 2.5–4 mm, (1–)1.5–2 times as long as sepals;

teeth 10, erect, margins convolute.

ovate-cylindric, ca. straight, short, broad, 9–13 mm, ca. 2 times as long as sepals;

teeth 10, erect or partially spreading, margins convolute.

Seeds

brown, 0.6–1.2 mm diam., tuberculate;

testa not inflated.

brown, 1.3–1.7 mm diam., with prominent papillae around margins and rows of small, transverse ridges on sides;

testa inflated, loose (rubs off when rolled between finger and thumb).

2n

= 36, 72, (108, Europe).

= 108.

Cerastium arvense

Cerastium terrae-novae

Phenology Flowering summer.
Habitat Serpentine gravel, sands, rocky tablelands
Elevation 20-700 m (100-2300 ft)
Distribution
from FNA
AK; AZ; CA; CO; CT; IA; ID; IN; MA; MD; ME; MI; MN; MO; MT; ND; NE; NH; NJ; NM; NV; NY; OH; OR; PA; SD; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NF; NS; NT; NU; ON; PE; QC; SK; YT; Worldwide
[WildflowerSearch map]
[BONAP county map]
from FNA
NF
[BONAP county map]
Discussion

Subspecies 2+ (2 in the flora).

The infraspecific taxonomy of Cerastium arvense is subject to many different interpretations. While many subspecies have been recognized, the “actual” number is uncertain because of worldwide distribution, wide range of variation, and conflicting taxonomies.

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

Cerastium terrae-novae is the only member of the European C. nigrescens group of species to occur in North America. The group is distinguished by large seeds with loose testae. Cerastium terrae-novae is distinguished by its narrowly elliptic leaves, usually purple-suffused stems and sepals, broad, straight capsule, short pubescence, and poorly developed inflorescence that often is reduced to a single flower.

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

Key
1. Taproot absent, plant strongly rhizomatous with long-creeping shoots; flowering stems usually 25-30 cm, often purple pigmented proximally, pubescence eglandular (glandular hairs present in inflorescence), soft, short or subglabrous; sepals 5-7 mm; anthers 1-1.1 mm; petals usually turning brown when dried
subsp. arvense
1. Taprooted or shortly rhizomatous, forming clumps; flowering stems usually 5-20 cm, green or straw colored, glandular-pubescent; sepals 3.5-6(-7) mm; anthers 0.8-0.9 mm; petals usually remaining white when dried
subsp. strictum
Source FNA vol. 5, p. 79. FNA vol. 5, p. 90.
Parent taxa Caryophyllaceae > subfam. Alsinoideae > Cerastium Caryophyllaceae > subfam. Alsinoideae > Cerastium
Sibling taxa
C. aleuticum, C. alpinum, C. arcticum, C. axillare, C. beeringianum, C. bialynickii, C. brachypetalum, C. brachypodum, C. cerastoides, C. dichotomum, C. diffusum, C. dubium, C. fastigiatum, C. fischerianum, C. fontanum, C. glomeratum, C. maximum, C. nutans, C. pumilum, C. regelii, C. semidecandrum, C. terrae-novae, C. texanum, C. tomentosum, C. velutinum, C. viride
C. aleuticum, C. alpinum, C. arcticum, C. arvense, C. axillare, C. beeringianum, C. bialynickii, C. brachypetalum, C. brachypodum, C. cerastoides, C. dichotomum, C. diffusum, C. dubium, C. fastigiatum, C. fischerianum, C. fontanum, C. glomeratum, C. maximum, C. nutans, C. pumilum, C. regelii, C. semidecandrum, C. texanum, C. tomentosum, C. velutinum, C. viride
Subordinate taxa
C. arvense subsp. arvense, C. arvense subsp. strictum
Synonyms C. beeringianum subsp. terrae-novae
Name authority Linnaeus: Sp. Pl. 1: 438. (1753) Fernald & Wiegand: Rhodora 22: 176. (1921)
Web links