annual, simple or branched, pubescent at base, towards the apex, glandularly viscid, with short pubescence; lower leaves obovate or oblong, obtuse, upper smaller, oblong, acute; cyme lax; bracts herbaceous; fruiting pedicels cernuous, 1 1/2–2.ce as long as the calyx; sepals lanceolate, acuminate, scarious at the margin and the nude apex; petals 1/3 shorter than the calyx; st. 10; the scarcely curved capsule twice as long as the sepals; seeds brown, densely tuberculated. Annual, 3–6 inches high, with the habit of C. vulgatum, L., (C. triviale, Link.) and C. glutinosum, Fries. From the first it differs by its annual root, and all the bracts herbaceous; from C. glutinosum (pumilum, Curt., Lond., 2. t. 92), which it much resembles, by the pubescence on the lower stem, with patent, white, not glandular hairs, the lower leaves larger, all the bracts herbaceous, not the upper ones scarious at margin, the petals smaller and the seeds twice as large, brown, more densely covered with more raised tubercles. From C. semidecandrum it differs by its more robust habit, bracts never semi-scarious, larger calyces, shorter petals, and different seeds.
