. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. SPORE-PRODUCING MEMBERS 323 shows a structure similar to that of Lepidodendron Harcourtii,1 and though there is no direct indication of the source of the cone, comparison of the structure with that of Lepidodendron stems, and with other Lepidodendroid cones, leaves no doubt of its being the strobilus of a Lepidodendron. The axis bears numerous sporophylls, of which thirteen are usually represented in each transverse section : the basal region of each extends horizontally from the axis, and supports th
. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. SPORE-PRODUCING MEMBERS 323 shows a structure similar to that of Lepidodendron Harcourtii,1 and though there is no direct indication of the source of the cone, comparison of the structure with that of Lepidodendron stems, and with other Lepidodendroid cones, leaves no doubt of its being the strobilus of a Lepidodendron. The axis bears numerous sporophylls, of which thirteen are usually represented in each transverse section : the basal region of each extends horizontally from the axis, and supports the sporangium, which may extend for fully half an inch along its surface (Fig. 168). The distal end of the sporo- phyll turns upwards, without any peltate expansion. pf/f. 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 Bower, F. O. (Frederick Orpen), 1855-1948. London, Macmillan and Co. , Ltd.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherlondonmacmillanand
