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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 edition. Excerpt: ...not. This is presumably due to the sensitivity of the female flowers to the increased humidity and temperature, or decrease in light, received in the bags. C6 (C. crenata X C. dentata) OP. JA X OP This tree was raised from a nut borne on a Japanese-American hybrid in 1940. The nut resulted from an uncontrolled or open-pollination; hence we know only the female parent. But because of various morphological characters of the twig and leaf we believe the male parent was Chinese or a Chinese hybrid. C6, of all the hybrids here described, is the one which most closely resembles the American chestnut in overall tree form and fruiting characters. It is a light nut producer, but this situation may be improved in grafted trees, particularly if they are grown in full sun. Natural infection by the blight fungus has caused some extra proliferation of cork cells in the lower portion of the trunk, but growth of the tree does not appear to be affected. C7 C. mollissima (C. crenata X C. dentata). C X JA The Chinese and Japanese-American parents used in this cross in 1939 were not used in the other CJA's described. Like C6 this selection has very good form, is a light nut producer, and a rapid grower. Of the trees we have of similar size, C7 probably equals or exceeds all the others in current rate (last 4 years) of height growth. It may not be as resistant to the blight fungus as hybrids Cl through C6, but to date inoculations and natural infections have caused only small cankers and extra proliferation of cork cells on the main trunk near the base of the tree. Rate of growth has not been noticeably affected. Nuts of C7 are attenuated or pointed toward the stylar end (extreme expression of a Japanese and American character) and are often angular when...
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Product details

  • Paperback | 114 pages
  • 189 x 246 x 6mm | 218g
  • United States
  • English
  • black & white illustrations
  • 1236829182
  • 9781236829184