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Published In: Bryologia Universa 1: 480. 1826. (Bryol. Univ.) Name publication detailView in Biodiversity Heritage Library

Project Name Data (Last Modified On 10/18/2013)
Acceptance : Accepted
Note : by Jerry A. Snider
Project data     (Last Modified On 6/7/2011)
Discussion: Asymmetric, ribbed capsules and connections between the forks of the peristome teeth are important features of the genus. The leaves have a considerable resemblance to some of the Pottiaceae (Barbula, for example) in shape, areolation, and revolution of margins, but the cells are not papillose. The tendency of the leaves to be keeled and the common excurrency of the costa (at least in C. purpureus) help in recognizing sterile specimens. Reference may be made to a recent revision of the genus by Burley & Pritchard (1990).
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Rather small plants in dense, dull tufts. Stems erect, simple or forked. Leaves contorted when dry, keeled, lanceolate, gradually acuminate, usually acute, sometimes ± awned; margins reflexed to revolute, notched or irregularly serrate near the tip; costa subpercurrent to excurrent, prominent at back; cells subquadrate, thick-walled, and smooth above, short-rectangular below. Dioicous. Perigonia swollen and conspicuous. Perichaetial leaves differentiated, sheathing. Setae erect, elongate; capsules suberect and nearly symmetric to strongly inclined and distinctly asymmetric, ± strumose at the base, ± sulcate when dry; annulus large and revoluble; operculum conic; peristome teeth 16, split nearly to the base into 2 terete divisions connected at the joints toward the base, bordered, papillose. Spores spherical. Calyptrae cucullate, smooth.


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