. Elementary botany. Botany. 286 MORPHOLOGY. buds which contain rudimentary shoot an<l root and several thick green leaves. When they fall to the grounil lliey j^^now into new lycopodiuni plants, just as the bulbils of C}-sto[)teris do \\hich were described in the chapter on ferns. 583. Note.—The prothallia of the species of lycopodium which have been studied are singular objects. In L. cernuuni a cylindrical body sunk in the earth is formed, and fruni the Uj'per suriace there are gr<*en lolies. In L. phlegmaria and some others slender branched, colorless bodies are formed which accordin
. Elementary botany. Botany. 286 MORPHOLOGY. buds which contain rudimentary shoot an<l root and several thick green leaves. When they fall to the grounil lliey j^^now into new lycopodiuni plants, just as the bulbils of C}-sto[)teris do \\hich were described in the chapter on ferns. 583. Note.—The prothallia of the species of lycopodium which have been studied are singular objects. In L. cernuuni a cylindrical body sunk in the earth is formed, and fruni the Uj'per suriace there are gr<*en lolies. In L. phlegmaria and some others slender branched, colorless bodies are formed which according to Treub grow as a saphrophyte in decayed bark of trees. Many of the prothallia examined have a fungus growing in their tissue wdiich is supposed to play some part in the nutrition of the prothallium. The little club mosses (selaginella). 584. Closely related to the club mosses are the selaginellas. These plants resemble closely the general habit of the club mosses, but are generally smaller and the leaves more delicate. Some species are grown in conservatories for ornament, the leaves of. Fig. 3j8. Fitr. 320. Fis. 330. Fin. 33T. Selaginella w i t h Fruiting s p i tc e Large spo- Small spo- three truiting spikes, sliuwing large and rangiiiiii. rangiinn. (Selaginella apus.) small sporangia. such usually having a beautiful metallic lustre. The lea\'es of some are arranged as in lycopodiuni, but man\- s])ecies ha\ e the leaves in four to rows. Fig. 32S represents a ])art of a selaginella plant (S. apus). The fruiting spike possesses similar lea\'es, but they are shorter, and their arrangement gi\ es to the spike a four- sided 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 Atkinson, George Francis, 1854-1918. New York : H. Holt
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