References for Pyrolaceae

Andres, H. 1912. Pyrola asarifolia Mich. und uliginosa Torr., ihr Verhaltnis zu P. rotundifolia L., und ihr Stellung in System. Ber. Deutch. Bot. Ges. 30:561-571.
Copeland, H.F. 1947. Observations on the structure and classification of the Pyroleae. Madrono 9:65-102.
Haber, E. 1972. Priority of the binomial Pyrola chlorantha. Rhodora 74:396-397.
Haber, E., and J.E. Cruise. 1974. Generic limits in the Pyroloideae (Ericaceae). Can. J. Bot. 52:877-883.
Hybridization of Pyrola chlorantha (Ericaceae) in North America. Can. J. Bot. 66: 1993. Pyrola. Page 564 in J.C. Hickman, ed. The Jepson manual: higher plants of California. Univ. Calif. Press. Berkeley and Los Angeles, CA.
Knaben, G., and T. Engelskjon. 1968. Studies in Pyrolaceae, especially in the Pyrola rotundifolia complex. Arbok Univ. Bergen, Mat.-Naturv. Ser. 1967, 4:1-71.
Krisa, B. 1966. Contributions to the taxonomy of the genus Pyrola in North America. Bot. Jahrb. 85:612-637.
Kron, K. A. 1996. Phylogenetic relationships of Empetraceae, Epacridaceae, Monotropaceae, and Pyrolaceae: Evidence from nuclear ribosomal 18 s sequence data. Annals of Botany. 77:293-303.

Source for the Reference Lists

George W. Douglas, Del Meidinger and Jim Pojar. 1998-2002. Illustrated Flora of British Columbia.