. Plants; a text-book of botany. Botany. 68 TLAKT STKUCTDEES nected together, so that a mycelium bearing uredospores is called a Urec/o, one bearing teleutospores a Pucciiiici, and one bearing acidia an ^Ecidlum ; but what forms of Ure/Io, Pucriida, and ^Ecklium belong together in the same life cycle is very difficult to discover. Another life cycle which has been discovered is in con- nection with the " cedar apples" which appear on red cedar (Fig. 54). In the spring these diseased growths be- come conspicuous, especially after a rain, when the jelly- like masses containing the oran
. Plants; a text-book of botany. Botany. 68 TLAKT STKUCTDEES nected together, so that a mycelium bearing uredospores is called a Urec/o, one bearing teleutospores a Pucciiiici, and one bearing acidia an ^Ecidlum ; but what forms of Ure/Io, Pucriida, and ^Ecklium belong together in the same life cycle is very difficult to discover. Another life cycle which has been discovered is in con- nection with the " cedar apples" which appear on red cedar (Fig. 54). In the spring these diseased growths be- come conspicuous, especially after a rain, when the jelly- like masses containing the orange-colored spores swell. This corresponds to the phase which produces rust in wheat. On the leaves of apple trees, wild crab, hawthorn, etc., the secidium stage of the same parasite develops. 4. Basidioiiycetes {Busidium-Fungi). 48. General characters.—This group includes the mush- rooms, toadstools, and puflballs. They are not destructive parasites, as are many forms in the preceding groups, but mostly harm- less and often useful sap- rophytes. They must also be regarded as the most highly organized of the Fungi. The popular distinction between toad- stools and mushrooms is not borne out by botan- ical characters, toadstool and mushroom being the same thing botanieally, and forming one group, puffballs forming an- other. ., „^ „ ,.^,, ^ As in .Ecidiomycetcs, rui. 55. The common edible mushroom, ^ Agarinis campeslris.—AfieT CiiBsos. no Sexual proCCSS huS. 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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