Successful interspecific crosses with Picea rubens as male or female parents have been reported or confirmed for P. mariana, P. omorika, P. glehnii, P. orientalis, and P. koyamai (15); P. sitchensis (14); P. glauca, P. mexicana (16); P. x lutzii Little (P. sitchensis x P. glauca), P. maximowiczii, and P. likiangensis (19).
Crossability of P. rubens with P. omorika is good with P. mexicana and P. likiangensis moderate; with P. mariana, P. orientalis, P. maximowiczii, and P. glehnii fair to poor; and with P. koyamai, P. sitchensis, P. x lutzii, and P. glauca very poor. Several species fail to cross with P. rubens (15,16,18,19).
Hybrids between P. rubens and P. mariana occur to some extent in nature, but parental species remain phenotypically pure in their characteristic habitats (15,30,31,34,35).
- Burns, Russell M., and Barbara H. Honkala, technical coordinators. 1990. Silvics of North America: 1. Conifers; 2. Hardwoods. Agriculture Handbook 654 (Supersedes Agriculture Handbook 271,Silvics of Forest Trees of the United States, 1965). U.S. Department of Agriculture, Forest Service, Washington, DC. vol.2, 877 pp. http://www.na.fs.fed.us/spfo/pubs/silvics_manual/table_of_contents.htm