. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 1815. Pinus Strobus. Leaf with a single fibro-vascular bundle (a), usually two peripheral resin-duets {b); strengthening cells (c) only beneath the epidermis; stomata {d) only on the two inner sides. mostly present beneath the epidermis and often sur- round the resin-ducts, sometimes also along the fibro- vascu
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 1815. Pinus Strobus. Leaf with a single fibro-vascular bundle (a), usually two peripheral resin-duets {b); strengthening cells (c) only beneath the epidermis; stomata {d) only on the two inner sides. mostly present beneath the epidermis and often sur- round the resin-ducts, sometimes also along the fibro- vascular bundles. (See Pigs. 1815-1818). The number of the fibro-vascular bundles and the position of the resin- ducts can be readily seen with a common magnifying glass in thin cross-sections made with a sharp razor from the middle of the leaf and placed on a glass-plate. In the following enumeration the species are grouped according to Mayr's classification, with a few slight changes; his names of his sections, however, are omitted, since they are mostly not well chosen, and the sectional and subsectional names of Engelmann sub- stituted as far as his groups could be brought in accord- ance with those of Mayr. To facilitate the determination of the cultivated species a key is given to determine plants without cones. Good illustrations are found in Sargent, Silva of N. America, vol. 11; Lambert, Descrip- tion of the genus Pinus; Lawson, Pinetum Britannicum; Forbes, Pinetum Woburnense; Antoine, Die Coniferen. For the horticultural vars. see Beissner, Nadelholz-. - —C 1816. Pinus Coulteri. Leaf with two fibro-vascular bundles {a); several parenchymatous resin-duets {h) \ strengthening cells (c) around the resin-ducts, several layers beneath the epi- dermis and along the inner and the outer side of the fihro-vascular bundles; stomata (d) all around. kunde and the new edition by A. H. Kent of Veitch's Manual of the Coniferee. Among other important works maybe mentioned E. A. Carrifer
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