236 FUNGL 
Agaricus gambosus, Fr., Alarasmius oreades, Fr., and some others 
grow in rings. Hence it will be seen that, within certain limits, 
there is considerable variation in the habitats of the Agaricini. 
Boleti do not differ much from Agaricini in their localization. 
They seem to prefer woods or borders of woods to pastures, 
seldom being found in the latter. One species, B. parasiticus, 
Bull, grows on old specimens of Scleroderma, otherwise they are 
for the most part terrestrial. 
Polypori also have no wide range of habitat, except in choice 
of trees on which to grow, for the majority of them are corti- 
colous. The section Afesopus, which has a distinct central stem, 
has some species which prefer the ground. Polyporus tuberaster, 
P., in Italy springs from the Pietra funghaia,* and is cultivated 
for food as well as Polyporus avellanus, which is reared from 
charred blocks of cob-nut trees. 
In other genera of the Polyporei similar habitats prevail. 
Merulius lacrymans, Fr., one form of dry rot, occurs in cellars, 
and too often on worked timber ; whilst Alerulius himantoides, 
Fr., is much more delicate, sometimes running over plants in 
conservatories, 
Hypnet.—There is nothing calling for special note on the 
habitats of these fungi. The stipitate species of Hydnum are 
some of them found in woods, others on heaths, one on fir-cones, 
while the rest have similar habitats to the species of Polyporus. 
Avricunarini—The genera Hymenochete, Stereum, and Cor- 
ticium, with some species of Thelephora, run over corticated or 
decorticated wood; other species of Thelephora grow on the 
ground. The Pezizoid forms of Cyphella and Solenia, like species 
of Peziza, sometimes occur on bark, and of the former genus 
some on grasses and others on moss. 
Cravatiet.—The interesting, often brightly-coloured, tufts ot 
Clavaria are usually found amongst grass, growing directly from 
the ground. Only in rare instances do they occur on dead leaves 
or herbaccous stems. Calocera probably should be classed with 
the Tremellini, to which its structure seems more closely allicd. 
The species are developed on wood. The species of Lyphula 
* Badham’s ‘‘ Esculent Furguses,” Ed. i. pp. 42, 116. 
