. Conifers and their characteristics. 104 PICE^, OR SPRUCE TREES more firmly to his magic carpet than do these young leaves to their so-called cushions. The two great divisions of the Piceae are differen- tiated by the shape of their leaves. While the true Spruce Firs have four-angled, four-sided (tetragonal) leaves, the Omoricas have only two-sided leaves, and are flat-leaved like the Abies. As has been pointed out before, this difference is easily ascertained by rolling them between thumb and finger. We give illustrations, two of each, of how a flat-leaved specimen looks when cut transversel
. Conifers and their characteristics. 104 PICE^, OR SPRUCE TREES more firmly to his magic carpet than do these young leaves to their so-called cushions. The two great divisions of the Piceae are differen- tiated by the shape of their leaves. While the true Spruce Firs have four-angled, four-sided (tetragonal) leaves, the Omoricas have only two-sided leaves, and are flat-leaved like the Abies. As has been pointed out before, this difference is easily ascertained by rolling them between thumb and finger. We give illustrations, two of each, of how a flat-leaved specimen looks when cut transversely and enlarged by magnify- ing process, and how a four-sided or tetragonal leaf appears treated Flat-leaved, or two-sided— Webblana. TRANSVERSE SECTION OF LEAVES (MAGNIFIED). It will be seen by this that the difference that exists between a paper-knife and kitchen roller, or, to pursue our metaphor on more strictly analogous lines, between a sawn two-inch plank and a naturally grown rounded tree-stem, if subjected to the same process, is hardly more pronounced. Most of these generic character- istics appear in the table, pp. 280-282. We have only to supplement them with the fact that on both the male flowers are solitary and situated in the axils of the top leaves, while the female flowers are solitary and terminal—that is to say, growing at the end of the branches. And of the cones we would add, in the case of the Omorica group, at times, when for instance they grow in clusters (as on the Omorica species. 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 Coltman-Rogers, Charles, 1854-. London, J. Murray
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherlondo, bookyear1920
