. Conifers and their characteristics. 68 ABIES, OR SILVER FIRS Numidica, in which they point backwards, point for- wards); (c) whether these median leaves arise from the branchlets straight up, as, for instance, in A. Ama- bilis, or whether they are at first appressed—that is to say, adhere for the first part of their length to the branchlets—before shooting up in a forward direction from the stem, as in the A. Nobilis and Magnifica ; (d) apex of leaf, whether sharply bifid (as Firma, Homolepis, Webbiana, etc.), or emarginate, or less sharply and more obtusely notched (as e,g, Pectinata,
. Conifers and their characteristics. 68 ABIES, OR SILVER FIRS Numidica, in which they point backwards, point for- wards); (c) whether these median leaves arise from the branchlets straight up, as, for instance, in A. Ama- bilis, or whether they are at first appressed—that is to say, adhere for the first part of their length to the branchlets—before shooting up in a forward direction from the stem, as in the A. Nobilis and Magnifica ; (d) apex of leaf, whether sharply bifid (as Firma, Homolepis, Webbiana, etc.), or emarginate, or less sharply and more obtusely notched (as e,g, Pectinata, etc.), or whether entire, with unbroken margin (as , Nobilis, Concolor, Magnifica, Lasiocarpa, Re- ligiosa); or whether the apex is rounded, obtuse, truncate, acute, or spine-tipped, as in Bracteata. Apex Entire Apex Apex Rounded Truncate notched notched ^ ill i. Apex Apex Spine Acute tipped Concolor Lasiocarpa A. Relig^iosa NobiUs Magnifica Pectinata Veitchii Firma Bracteata Cephalonica Grandis Amabilis Brachyphylla Pinsapo Nordmanniana (very slightly (apex more Lowiana sometimes) pen-nibbed Mariesii fCUicia \ Numidica shape. Sachalinensis Sibirica Homolepis Balsamea Stomata.—Whether they show white stomatiferous bands on one side of the leaf or on both sides, as do the Spruces (Piceae) upon all sides. The Silver Firs (Abies) are rarely stomatiferous on both sides of the leaf, and in instances where tfiey are, often not whole-heartedly but in broken bands, or only on the leaves of the higher boughs. The following are the exceptions among Silver Firs that show stomata on both sides of the leaf: Lowiana, Concolor, Lasiocarpa, Arizonica, Nobilis, Magnifica, Numidica, and Pinsapo, also the Cephalonica—but inconspicuously, except with the aid of magnifying glasses. I should like to add to these the A. Sacha- linensis, although it does not generally appear to be. Please note that these images are extracted from scanned page images that may have been digitally enhanced for
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherlondo, bookyear1920
