. Biochemical systematics. Biochemical variation; Botany. HoC CH CHs HoC H.,C. a-pmene ^-pinene Optical rotation varies somewhat, apparently because of vary- ing proportions of the three compounds. Although some jack pine samples are levorotatory, those from Alberta were all dextrorotatory. Analysis of the turpentine from an artificial Fi hybrid from California indicated 75 to 78 per cent pinenes and 20 to 22 per cent phellandrene. The conclusion, then, was that the turpentine of the hybrid was of a mixed nature. From the natural hybrid swarm Mirov collected turpentine from seventy-three indiv
. Biochemical systematics. Biochemical variation; Botany. HoC CH CHs HoC H.,C. a-pmene ^-pinene Optical rotation varies somewhat, apparently because of vary- ing proportions of the three compounds. Although some jack pine samples are levorotatory, those from Alberta were all dextrorotatory. Analysis of the turpentine from an artificial Fi hybrid from California indicated 75 to 78 per cent pinenes and 20 to 22 per cent phellandrene. The conclusion, then, was that the turpentine of the hybrid was of a mixed nature. From the natural hybrid swarm Mirov collected turpentine from seventy-three individuals, including trees of an intermediate character, and those typical of the parental species. Additional samples of lodgepole and jack pine were included, presum- ably from regions more remote from the hybrid swarm. Analyses of the turpentine from individual trees showed extensive variation. Estimation of the per cent of phellandrene in hybrids ranged from about 13 per cent in the artificial hybrid (data from one figure of the text give a figure of 20 to 22 per cent) to slightly above 40 per cent among certain individuals of the natural hybrid groups. Pure lodgepole gave 73 per cent phellandrene and only one morphological "hybrid" gave little or no phellandrene. A more comprehensive presentation of the biochemical and morphological data is given in the table below, adapted from Mirov (1956). Morphological Chemical Character of the Oil Character Jack Pine Intermediate Lodgepole Pine Jack pine Intermediate Lodgepole pine 21 3 3 0 14 17 0 0 15. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Alston, Ralph E; Turner, B. L. (Billie Lee), 1925-. Englewood Cliffs, N. J. , Prentice-Hall
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