Aphanorrhegma serratum

(Wilson & Hooker) Sullivant

in A. Gray, Manual, 647. 1848,.

Basionym: Schistidium serratum Wilson & Hooker Musc. Amer. S. States 2: no. 20. 1841
Treatment appears in FNA Volume 27. Treatment on page 181. Mentioned on page 195.

Plants gregarious to scattered; leaves slightly twisted when dry; perichaetial leaves erect-spreading when dry, exposing the capsule.

Phenology: Capsules mature (Jul) Sep–Dec.
Habitat: Soil, clay, along creeks or trails in places subject to inundation, rarely among other mosses
Elevation: low to moderate elevations


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Ont., Que., Ark., Conn., D.C., Fla., Ill., Ind., Iowa, Kans., Ky., La., Md., Mich., Minn., Miss., Mo., Nebr., N.J., N.Y., N.C., Ohio, Okla., Pa., Tenn., Va., Vt., W.Va., Wis.


Aphanorrhegma serratum resembles the sympatric Physcomitrella patens, from which it differs in its capsule’s regular line of dehiscence and collenchymatous exothecial cells; it also grows occasionally with Physcomitrium immersum. The latter two species are small and both have an immersed operculate capsule. Physcomitrium immersum is distinguished by a distal line of dehiscence (versus equatorial in A. serratum), the presence of an annulus of small cells, the thin-walled (versus collenchymatous) exothecial cells, and an urceolate rather than a globose operculate urn. Aphanorrhegma serratum has been reported from Texas by H. A. Crum and L. E. Anderson (1981). I have seen only one collection (Duke) from that state, but the specimen lacks collenchymatous exothecial cells, bears a distinct annulus, and hence is here referred to Physcomitrium immersum.

Selected References


Lower Taxa

... more about "Aphanorrhegma serratum"
Bernard Goffinet +
(Wilson & Hooker) Sullivant +
Schistidium serratum +
Ont. +, Que. +, Ark. +, Conn. +, D.C. +, Fla. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, Tenn. +, Va. +, Vt. +, W.Va. +  and Wis. +
low to moderate elevations +
Soil, clay, along creeks or trails in places subject to inundation, rarely among other mosses +
Capsules mature (Jul) Sep–Dec. +
in A. Gray, Manual, +
Aphanorrhegma serratum +
Aphanorrhegma +
species +