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Cerastium dubium (Bast.) Guépin  

No occurrences found

Family: Caryophyllaceae
doubtful chickweed
[Dichodon viscidum (Bieb.) Holub]
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not available
  • FNA
  • Gleason & Cronquist
  • Resources
John K. Morton in Flora of North America (vol. 5)
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. Flowering spring. Alien weed of cultivated land; 200-800 m; introduced; Ark., Idaho, Ill., Ind., Kans., Ky., Miss., Ohio, Oreg., Tenn., Va., Wash.; s Europe; Asia. 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.

Vascular plants of NE US and adjacent Canada
Lax, finely glandular-puberulent annual 1-3 dm; lvs 1-3 cm נ1-2 mm; fls in lax, open dichasia, the pedicels to 15 mm; bracts wholly herbaceous; sep 5, 3.5-6 mm; pet 5, about equaling or a little longer than the sep, shortly cleft; styles 3; fr 6-toothed; 2n=36, 38. European weed, casually intr. with us, as in Ill. (C. anomalum)

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
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