Guide to Liverworts of Oregon: Riccia crystallina L. emend Raddi
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Riccia 1b terrestrial > Riccia 2b marginal projections lacking > Riccia 5a surface spongiose > Riccia 6b surface obscurely lacunose or smooth > 6.1b surface smooth, not lacunose > Riccia crystallina
Synonym: None.
Special Status: None.
Recognition: Bluish thallus, barely spongiose surface but with air chambers well developed under epidermis. Monoicous.
Distribution: To be looked for in SW Oregon.
Comments: I have not seen authentic material from Oregon. Early records (Frye & Clark 1937, p. 35) should be verified because of confusion in past literature. Doyle and Stotler (2006) state that this species is known only from California. See also paper by Stotler and Doyle (2004) for SEM images of spores.
Riccia crystalina Frye & Clark 1937, p. 35.
Hastings Preserve, Monterey Co., Oregon. DHW m1222.
Hastings Preserve, Monterey Co., Oregon. DHW m1222.
Riccia crystallina. Distal aspect. Forest of Nicene Marks State Park, Santa Cruz Co., California. W. Doyle 9926 (UC).
Riccia crystallina. Proximal aspect. Forest of Nicene Marks State Park, Santa Cruz Co., California. W. Doyle 9926 (UC).
Riccia crystallina. Side view. Forest of Nicene Marks State Park, Santa Cruz Co., California. W. Doyle 9926 (UC).