Cerastium pumilum Curtis, it is an annual, usually erect, up to 15 cm tall, reddish tinged or pale green herb. Stem beset with glandular and eglandular, sub patent hairs. Leaves oblanceolate to ovate-oblong or the upper ones ovate. 5-20 x 3-8 (-10) mm, eglandular hairy on both sides, attenuate at the base, apex obtuse-apiculate. Flowers in terminal, ± lax, many-flowered clusters. Bracts with only margins and apices scarious. Pedicels 4-8 mm long, mostly longer than sepals, densely glandulose. Sepals 5, lanceolate to oblong-lanceolate, 4-5 x 1.5 mm, glandular and simple hairy outside, with acute, c. 1 mm apical part membranous, without It tuft of hairs at the apex. Petals 5, oblong-oblanceolate, shorter to slightly longer than sepals. apically 2-fid to a quarter of their length, with branched veins. Stamens 5 (-10), filaments alternating with and equalling to c. 0.5 as long as petals, dilated towards the base; anthers yellow. Ovary ovoid-oblong, glabrous; styles 5, internally stigmatic. Capsule straw yellow, narrowly cylindrical, semi-transparent. 6-8 mm long, dehiscing by 10, truncate teeth with revolute margins. Seed ± reniform, pale brown, c. 0.5 mm long, finely tuberculate.
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