404 APPENDIX. 



casionally forms resting spores in that host. They may be found 

 in abundance in the flowers of radish which become much enlarged 

 and distorted when this fungus is parasitic thereon. All species 

 may be known by the white blisters formed by lifting the skin of 

 the host. Preserve in formalin or alcohol leaves and stems of 

 host bearing blisters. Some may also be dried. 



Peziza. — The cup fungi grow on earth or fallen rotting leaves, 

 twigs or trunks, in woods. The fructifications may be at once 

 recognized by their cup-like form. The inner surface of the cup 

 is often bright colored, red or orange, brown or black. The 

 mycelium is hidden in the substratum. They may be collected in 

 spring and summer and preserved in formalin or 70 per cent, 

 alcohol. 



Lichens. — Any common foliose species which forms apothecia 

 abundantly will answer. A bright gray species with black apo- 

 thecia (Physcia stellaris) is abundant on tree trunks, as is also a 

 yellowish species with orange apothecia (Thdoschistes polycarpa). 

 These may be collected at any convenient time, and kept dry. 

 Besides these, collect other foliose forms; also species of Cladonia 

 growing on the ground, with body much lobed and the apothecia 

 coral-red knobs on upright gray stalks; also species of Usnea, 

 clothing the branches of trees with gray-green shrub-like or hair- 

 like tufts. 



Mushroom. — Any species with cap and gills will answer. They 

 may be found in woods throughout the summer and especially 

 in late summer or autumn during a rainy season following 

 drought. Only the fructification need be collected. Select a 

 small firm species with well defined stalk, cap and gills. Col- 

 lect fructifications in all stages of development from young to 

 mature. Preserve as soon as gathered in formalin or 70 per cent, 

 alcohol. 



Other Hymenomycetes. — Collect fleshy cap fungi with hanging 

 points instead of gills {Hydnum, fig. 217), or intersecting plates 

 forming tubes {Boletus). Preserve these as mushroom. Collect 

 also the woody bracket fungi (Polyporus, fig. 218), which grow on 

 rotten trees and fallen limbs, showing innumerable fine tubes 

 underneath. Preserve dry. Also the much branched firm- 

 fleshed Clavaria (fig. 215). Preserve as mushroom. All will be 

 found in damp woods. 



Marchantia. — Common on wet ground and rocks, or even in 

 drier places among grass in the shade of walls or fences. It 



