Elementary botany . Fig. rcpandum, spines hanging down from under side of cap. 212 Fig. botrytes. CHAPTER XXII. CLASSIFICATION OF THE FUNGI. 429. Classification of the fungi.—Those who believe that the fungi repre-sent a natural group of plants arrange them in three large series related toeach other somewhat as follows •. The Basidium Type or number of gonidia on a ba-sidium is limited and definite,and the basidium is a characteris-tic structure; examples: uredineae(rusts), mushrooms, etc. The Ascus Type or Series. Thenumber of spores in an ascus
Elementary botany . Fig. rcpandum, spines hanging down from under side of cap. 212 Fig. botrytes. CHAPTER XXII. CLASSIFICATION OF THE FUNGI. 429. Classification of the fungi.—Those who believe that the fungi repre-sent a natural group of plants arrange them in three large series related toeach other somewhat as follows •. The Basidium Type or number of gonidia on a ba-sidium is limited and definite,and the basidium is a characteris-tic structure; examples: uredineae(rusts), mushrooms, etc. The Ascus Type or Series. Thenumber of spores in an ascus islimited and definite, and the ascus isa characteristic structure; examples:leaf curl of peach (exoascus), pow-dery mildews, black knot of plum,black rot of grapes, etc. 430. Others believe that the fungi do not represent a natural group, butthat they have developed off from different groups of the algae by becomingparasitic. As parasites they no longer needed chlorophyll, and conse-quently lost it. According to this view the lower fungi have developed off from the loweralgae (saprolegnias, muco
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