. Studies in fossil botany . Paleobotany. i94 STUDIES IN FOSSIL BOTANY is quite probable, however, that the bristles and other appendages of the megaspores may have served to catch the microspores, and thus secure their presence when dis- persal took place. Recent discoveries have shown that the difficulty was met, in some of the Palaeozoic Lycopods, in another way, namely, by the formation of a kind of ovule or seed, which may probably have been ferti- lised, or at least pollinated, while still on the plant. In -=u. Lepidocarpon Lomaxi, a cone so closely allied to Lepidostrobus that male spec
. Studies in fossil botany . Paleobotany. i94 STUDIES IN FOSSIL BOTANY is quite probable, however, that the bristles and other appendages of the megaspores may have served to catch the microspores, and thus secure their presence when dis- persal took place. Recent discoveries have shown that the difficulty was met, in some of the Palaeozoic Lycopods, in another way, namely, by the formation of a kind of ovule or seed, which may probably have been ferti- lised, or at least pollinated, while still on the plant. In -=u. Lepidocarpon Lomaxi, a cone so closely allied to Lepidostrobus that male specimens were formerly regarded by myself and others as a mere variety of L. oldhamius, each megaspor- . angium contains a single mature I1 ig. So.—Lepidocarpon Lomaxi. ° Sporangium and sporophyii be- megaspore or embryo-sac, filling fore integument was formed; in tangential section of cone, cu, almost the whole Cavity (Fig. lateral cushions of sporophyii; a, n . , • i i i base of sporangium; Avascular 8o), but accompanied by three bundle ; **, palisade layer of abortive spores so that the sporangium; tut, inner layer of " J fc waii; mg membrane of mega- original number in each spor- spore or embryo sac. This section r does not pass through the angium was no doubt four, of abortive spores. X about 12. (G. t. g.) Scott, Phil. Tra?is. which one gained the upper hand over the rest. Around the sporangium, the wall of which was identical in structure with that of a Lepidostrobus, the tissue of the bract grew up to form a regular integument, closing. 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 Scott, Dukinfield Henry, 1854-1934. London, A. and C. Black
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