. Plants; a text-book of botany. Botany. 164 PLANT STEUCTUEES gradation between ordinary foliage leaves and distinct sporophylls. The sporangia are borne either by distinct sporophylls or by the ordinary foliage leaves near the summit of the stem. At the base of each of these leaves, or sporophylls, on the upper side, is a single sporangium (Fig. 137). The sporangia are eusporangiate in origin, and as the spores are all alike, Lycopodiiim has the same homosporous-eusporan- giate combination noted in Equisetales and in one of the groups of Filicales. 89. Selaginella.—This large genus contains t
. Plants; a text-book of botany. Botany. 164 PLANT STEUCTUEES gradation between ordinary foliage leaves and distinct sporophylls. The sporangia are borne either by distinct sporophylls or by the ordinary foliage leaves near the summit of the stem. At the base of each of these leaves, or sporophylls, on the upper side, is a single sporangium (Fig. 137). The sporangia are eusporangiate in origin, and as the spores are all alike, Lycopodiiim has the same homosporous-eusporan- giate combination noted in Equisetales and in one of the groups of Filicales. 89. Selaginella.—This large genus contains the smaller, more delicate Club-mosses, often being called the "little ; They are especially displayed in the trop-. FiB. 138. Selaginella, Bhowing general epray-like habit, and dangling leafless stems which strike root (7-hizophcrres).—¥TOTsi " Plant ; ics, and are common in greenhouses as delicate, mossy, decorative plants (Pig. 13S). In general the sporophylls are not different from the ordinary leaves (Fig. 139), but sometimes they are modified, though not so distinct as in certain species of 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 Coulter, John Merle, 1851-1928. New York, D. Appleton and company
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