Flora of North America species comparison

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Cerastium dubium

anomalous mouse-ear chickweed, doubtful chickweed, three-style chickweed
Habit Plants annual, taprooted.
Stems

erect, many-branched from base, 10–40 cm, minutely viscid-glandular; small axillary tufts of leaves usually absent.
Leaves

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

lax, 3–21(–30)-flowered cymes;

bracts narrowly lanceolate, glandular-pubescent.
Pedicels

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).
Capsules

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, ovate, 0.6 mm diam., tuberculate;

testa not inflated.
2n

= 36, 38.

Cerastium dubium
Phenology Flowering spring.
Habitat Alien weed of cultivated land
Elevation 200-800 m (700-2600 ft)
Distribution
from FNA
AR; ID; IL; IN; KS; KY; MS; OH; OR; TN; VA; WA; s Europe; Asia [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
Discussion

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. 85.
Parent taxa Caryophyllaceae > subfam. Alsinoideae > Cerastium
Sibling taxa
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. 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
Synonyms Stellaria dubia, C. anomalum, Dichodon viscidum
Name authority (Bastard) Guépin: Fl. Maine et Loire ed. 2, 1: 267. (1838)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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