Download or read book Opening Temperatures in Serotinous Cones of Lodgepole Pine written by David A. Perry and published by . This book was released on 1977 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cones from 13 lodgepole pine trees classified as closed-cone (serotinous), open-coned (nonserotinous), or intermediate (both kinds of cones on one tree) were immersed in water baths to determine the temperature range of cone opening. Results were as follows: closed cones, 45 to 60 degrees celcius, open cones, room temperature (25 degrees celcius) to 50; and intermediate cones, 35 to 50. At least some cones thought to be "open" may, in fact, be serotinous cones that open at low temperature. --Abstract