. The classification of flowering plants. Plants. 48 FLOWERING PLANTS [CH. the outside air by lenticel-like apertures in ^ the surface. The cortical space becomes filled with Xostoc, and adjacent cells of the cortex send out papillate prolongations into it. The lenticel- development suggests that the function of these root-branches is, at any rate in part, Fig. 3. Zamia integrifolia. Female plant shewing foliage-leaves alternating with series of scale-leaves, and fertile cone. (After Jacquin.) A. Male sporophvU. B. Female sporophyll. The stem when young is short and tuber-like an
. The classification of flowering plants. Plants. 48 FLOWERING PLANTS [CH. the outside air by lenticel-like apertures in ^ the surface. The cortical space becomes filled with Xostoc, and adjacent cells of the cortex send out papillate prolongations into it. The lenticel- development suggests that the function of these root-branches is, at any rate in part, Fig. 3. Zamia integrifolia. Female plant shewing foliage-leaves alternating with series of scale-leaves, and fertile cone. (After Jacquin.) A. Male sporophvU. B. Female sporophyll. The stem when young is short and tuber-like and in the majority of cases remains so throughout the life of the plant (fig. 3). In some cases, especially in species of Gycas, a stout columnar trunk is formed which with its crown of huge pinnate leaves recalls the habit of a tree-fern or date-palm (fig. 4, A). The leaves form a terminal crown and are spirally arranged. They are of two kinds; brown, often roughly felted scale-leaves and large compound foliage-leaves, a series of each being pro- duced in turn, the former in larger numbers preceding and covering the latter in the bud. A year or longer intervenes between the appearance of each group of foliage-leaves. The stout, sometimes thorny, petiole springs from a small thickened. 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 Rendle, A. B. (Alfred Barton), 1865-1938. Cambridge, University press
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1904
