About Callicladium imponens (Hedw.) Hedenäs, Schlesak & D.Quandt
Callicladium imponens is a species of moss. Its stem leaves are falcate-secund, ranging in shape from triangular-ovate to oblong-lanceolate, and gradually taper toward the apex. Stem leaves measure roughly 1.8 to 2 mm long and 0.6 to 0.8 mm wide. The leaf base is somewhat decurrent and lacks auricles. Leaf margins are either flat or weakly recurved at the base, with serrulations toward the distal end, and are very rarely nearly entire. The leaf acumen is slender. This moss is dioicous, meaning male and female reproductive structures grow on separate individual plants. Key identifying characteristics include pigmented, heterogeneous alar cells, reddish stems, long-toothed foliose pseudoparaphyllia, and nearly erect cylindric capsules. Its branches typically grow in a single horizontal plane. Its capsules mature between July and September. It grows on decaying logs, rocks, and soil across a range of elevations. It is distributed across Greenland, multiple Canadian provinces (New Brunswick, Newfoundland and Labrador, Nova Scotia, Ontario, and Prince Edward Island), most of the Eastern United States, and Europe.
