Porpolomopsis calyptriformis
Regensb. Mykol. Schr. 15: 145. 2008.
Common Name: none
Synonyms: Hygrocybe calyptriformis (Berk.) Fayod; Hygrophorus calyptriformis (Berk.) Berk
For descriptions see Largent, Knudsen & Vesterholt, and Siegel & Schwarz.
Arora, D. (1986). Mushrooms Demystified. Ten Speed Press: Berkeley, CA. 959 p.
Babos, M., Haláz, K., Zagyva, T., Zöld-Balogh, Szego˝, D. & Bratek, Z. (2011). Preliminary notes on dual relevance of ITS sequences and pigments in Hygrocybe taxonomy. Persoonia 26(1): 99-107.
Cantrell, S. & Lodge, D.J. (2001). Hygrophoraceae (Agaricales) of the Greater Antilles : Hygrocybe subgenus Pseudohygrocybe section Firmae. Mycol. Res. 105(2): 215-224.
Knudsen, H. & Vesterholt, J. ed. (2008). Funga Nordica: Agaricoid, boletoid and cyphelloid genera. Nordsvamp: Copenhagen, Denmark. 965 p.
Knudsen, H. & Vesterholt, J. ed. (2012). Funga Nordica: Agaricoid, boletoid, clavarioid, cyphelloid and gastroid genera. Vol. 1. Nordsvamp: Copenhagen, Denmark. 511 p.
Largent, D.L. (1985). The Agaricales (Gilled Fungi) of California. 5. Hygrophoraceae. Mad River Press: Eureka, CA. 208 p.
Siegel, N. & Schwarz, C. (2016). Mushrooms of the Redwood Coast. Ten Speed Press: Berkeley, CA. 601 p.