Guide to Liverworts of Oregon: Riccia cavernosa Hoffm.
HOME SPECIES INDEX GENUS INDEX GLOSSARY
Riccia 1b terrestrial > Riccia 2b marginal projections lacking > Riccia 5a surface spongiose > Riccia 6a surface conspicuously spongiose > Riccia cavernosa
Synonym: Riccia crystallina auct. non L.
Special Status: None.
Recognition: The strongly spongiose upper surface is distinctive; R. frostii also has a spongiose surface but not as conspicuous; R. cavernosa is monoicous while R. frostii is dioicous.
Distribution: On soil; in all parts of the state.
Comments: The spongiose surface provides a means of identifying even very young specimens. Note that specimens of this species have frequently been misidentified in the past as R. frostii or misnamed R. crystallina.
A helpful resource is the British Bryological Society page with good images of this species. Riccia cavernosa Images.
Riccia cavernosa. Modoc Co., California. DHW
m1452a
Riccia cavernosa, Pamelia Lake, Linn Co., Oregon. B. Ross 27 August 2015.
Riccia cavernosa, Pamelia Lake, Linn Co., Oregon. B. Ross 27 August 2015.
Riccia cavernosa, British Bryological Society, Learning, Species Finder. D. Callaghan, accessed 22 April 2024.
Riccia cavernosa, British Bryological Society, Learning, Species Finder. C. Halperin, accessed 22 April 2024.
Riccia cavernosa, Spore, distal aspect. Fort Ord Public lands, Monterey Co., California. W. Doyle 7462 (UC).
Riccia cavernosa, Spore, proximal aspect. Fort Ord Public lands, Monterey Co., California. W. Doyle 7462 (UC).
Riccia cavernosa, Spore, side view. Fort Ord Public lands, Monterey Co., California. W. Doyle 7462 (UC).