CLASSIFICATION 393 



other genus, if attention is paid to tlie very thin, tomentose flesh 

 from which the spines originate. Colour rusty or brownish. 



Kneiffia 

 Entirely adnate to the substratum. Crust very thin, sometimes 

 subgelatinous, destitute of granules or warts, but bearing scattered 

 or tufted, very minute, slender bristles. Often very wide-spreading, 

 thin and encrusting, or growing out of cracks in bark, and assuming 

 various forms. Superficially resembling Grandiiiia granulosa, but 

 distinguished under a pocket lens by the bristle-like spines instead 

 of warts. 



MUCRONELLA 



Sporophore or flesh almost wanting. Resembling Hydnum in 

 the sharp-pointed spines, but dift'ering very materially in the 

 almost entire absence of flesh, from which the spines originate in 

 Hydnum. The spines are slender, scattered or fasciculate, when 

 they are more or less connected at the base, and appear to be spring- 

 ing almost directly from the matrix, up to i in. in length. 



SiSTOTREMA 



In this genus we find an attempt at a cap supported on a more 

 or less central stem. The caps are small, and as the plants usually 

 grow in clusters the caps grow into each other, so that we have 

 an irregular growth of caps supported on several stems. The teeth 

 or spines appear on the under surface of the cap, and are very 

 irregular in form, often flattened and toothed. Our one species 

 grows on the ground. 



Radulum 



Sporophore resupinate, vaguely effused or forming roundish 

 patches on bark, etc. The spines take the form of coarse tubercles 

 or finger-like, blunt outgrowths, more or less elongated. Distin- 

 guished among allies by the large, deformed, elongated, blunt 

 tubercles. 



Grandinia 



Forming thin, crust-like expansions on bark and wood, having 

 the entire surface covered with minute warts or granules, only 

 clearly observed under a pocket lens. Warts entire, smooth, 

 usually indented at the tip. 



Odontia 

 Entirely adnate and often wide-spreading on bark and wood. 

 The flesh consists of thin, interwoven hyph?e traversed by promi- 

 nent branching veins, and having the surface covered with minute 

 warts, the warts l:;eing minutely spinulose or with a cluster of liristles 

 at the tip, a feature only to be seen under a good pocket lens. 



