Directory       News       Site Map       Home

California Moss eFlora

Jan 1 2013 ·

Home · List of Genera · Key to Keys · Accepted Names · Synonyms · For Beginners · Subdivisions of CA · Jepson eFlora for CA Vascular Plants
Mail a comment to Paul Wilson

Physcomitrella Bruch & W. P. Schimper in Bruch & W. P. Schimper, 1849.



The genus Physcomitrella is one of the winter and early spring ephemeral mosses with immersed capsules. As such, Physcomitrella is unlikely to be collected unless it has sporophytes. The ephemeral mosses with immersed capsules are all plants of open, often disturbed soil, but our two species of Physcomitrella are mainly plants of mud laid bare by the retreating water of lakes and ponds. Three Funariaceae mosses of the western United States can have immersed capsules. The capsules of Aphanorrhegma serratum are dehiscent by means of an operculum, have collenchymatous but otherwise thin-walled exothecial cells, and the calyptra is small, mitrate and basally fringed; our two species of Physcomitrella have no operculum, thick-walled but not collenchymatous exothecial cells and the calyptra is small and mitrate but not fringed. Physcomitrium immersum has a well-defined operculum; thin-walled and hexagonal exothecial cells, and the calyptra resembles that of Aphanorrhegma.
see key to Acaulon Etc.

Species included:
Physcomitrella patens (Hedwig) Bruch & W. P. Schimper
Physcomitrella readeri (C. Müller Hal.) Stone & G. A. M. Scott


Copyright © 2013 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from the University and Jepson Herbaria.