. Guide to Sowerby's models of British fungi in the Department of Botany, British Museum (Natural History) . ia form a friable, spurious cortex, containing much following is the only British species. 209. Fuligo varians Somm. Popularly known as flowers oftan.—An irregular yellow mass, very variable in size; it becomesat length a dusty mass of violet-black spores. Under favourable conditions the spores will<&\JX^ retain their vitality forseveral years. Frequent on tan-beds, sawdust, and sometimes on stumps. It is often a great nuisance in hot- j«^x 200 houses where tan is used, fig.

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. Guide to Sowerby's models of British fungi in the Department of Botany, British Museum (Natural History) . ia form a friable, spurious cortex, containing much following is the only British species. 209. Fuligo varians Somm. Popularly known as flowers oftan.—An irregular yellow mass, very variable in size; it becomesat length a dusty mass of violet-black spores. Under favourable conditions the spores will<&\JX^ retain their vitality forseveral years. Frequent on tan-beds, sawdust, and sometimes on stumps. It is often a great nuisance in hot- j«^x 200 houses where tan is used, fig. 92.—Fuliso varians Somm. (Natural size.) for the FllUqO will SOme- Spores and threads x 2c». ^j^^^^ Completely cover the tan and entirely stop the growth ot plants which are beingcultivated. It has been found to contain formic and acetic acids. GENUS LVII.—LYCOGALA Mich. The fruit regular, enclosed in a definite cortex, and formed ofsporangia containing round spores and branching and anastomosingthreads, with external thickenings inthe shape of irregular rings. Thereare two British

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