BULLETIN 175, U. S. DEPARTMENT OF AGRICULTURE. 



attached to the margin of the cap, as present in Hypholoma appen- 



diculatum. 



The volva, or universal veil, is the term applied to the membranous 



envelope which in some genera entirely incloses the cap and stem. 



In certain species it ruptures at maturity, leaving a cup-shaped base, 



while often a portion adheres to the pileus in the form of warts or 



scales. 



DESCRIPTIONS OF SPECIES. 



In this paper the general plan has been to give a description of the 



class or family, then a key to assist in the identification of the species 



herein discussed, and lastly descriptions of the individual genera or 



species. Descriptions of the following species will be found on the 



pages indicated. 



Agariciis arvensis 32 



Agaricus campestris 32 



Agaricus placomyces. . . 32 



Agaricus rodmani 33 



Agaricus silvicola 33 



Agaricus sub ruf escens. . 33 



Amanita caesarea 7 



Amanita muscaria 7 



Amanita phalloides 8 



Amanita rubescens 8 



Amanita solitaria 9 



Amanita strobiliformis . 9 



Amanita verna 9 



Amanitopsis farinosa — 9 



Amanitopsis vaginata. . 10 



Armillaria mellea 12 



Armillaria nardosmia . . 12 



Armillaria ventricosa . . 12 



Boletus bicolor 38 



Boletus chrysenteron . . 38 



Boletus edulis 39 



Boletus felleus 39 



Boletus granulatus 39 



Boletus luteus 39 



Bovista pila 50 



Bulgaria inquinans 54 



Bulgaria rufa 54 



Calvatia cyathiformis.. 50 



Calvatia gigantea 50 



Cantharellus auranti- 



acus 14 



Cantharellus cibarius . . 14 

 Catastoma circumscis- 



sum 51 



Claudopus nidulans 27 



Clavaria pistillaris 46 



Clitocybe amethystina. 14 



Clitocybe dealbata 14 



Clitocybe illudens 15 



Clitocybe laccata 15 



Clitocybe monadelpha . 15 



Clitocybe multiceps ... 15 

 Clitocybe ochropur- 



purea 15 



Collybia butyracea 18 



Collybia dryophila 18 



Collybia platyphylla. . . 18 



Collybia radicata 19 



Collybia velutipes 19 



Coprinus atramentarius. 35 



Coprinus comatus 36 



Coprinus fimetarius 36 



Coprinus micaceus 36 



Cortinarius cinnamo- 



meus 30 



Cortinarius lilicinus 30 



Cortinarius sanguineus. 31 



Cortinarius violaceus. . . 31 



Crucibulum vulgare ... 53 



Cyathus stercoreus 53 



Cyathus striatus 53 



Cyathus vernicosus 53 



Daedalea quercina 42 



Dictyophora duplicata. 48 



Dictyophoraravenelii.. 48 



Entoloma grayanum ... 28 



Exidia glandulosa 45 



Fistulina hepatica . 42 



Fomes applanatus 40 



Fomes lucidus 40 



Galera tenera 31 



Geaster hygrometricus . 51 



Guepinia spathularia . . 46 



Gyromitra esculenta ... 55 



Hirneola auricula-judae 45 



Hydnum coralloides ... 43 



Hydnum erinaceum 43 



Hydnum imbricatum . . 44 



Hydnum repandum 44 



Hydnum septentrionale 44 

 Hygrophorus chrysodon 24 

 Hygrophoruscoccineus. 24 

 Hygrophorus conicus.. . 24 

 Hygrophorus eburneus. 24 

 Hygrophorus hypothe- 

 cs 24 



Hypholoma appendicu- 



latum 34 



Hypholoma perplexum 35 

 Hypholoma sublateriti- 



um 



Ithyphallus impudicus 

 Irpex f us co- violaceus . 

 Lactarius chelidonium 

 Lactarius deceptivus. . 

 Lactarius deliciosus. . . 



Lactarius fumosus . 21 



Lactarius indigo 21 



Lactarius piperatus 22 



Lactarius torminosus. . . 22 



Lactarius volemus 22 



Lentinus lecomtei 26 



Lentinus lepideus 26 



Leotia chlorocephala. . . 55 



Leotia lubrica 55 



Lepiota americana 10 



Lepiota morgani 10 



Lepiota naucina 11 



Lepiota procera 11 



Lepiota rachodes 11 



Lycoperdon gemmatum 49 

 Lycoperdon pyriforme. 49 

 Marasmius cohaerens ... 25 



Marasmius oreades 25 



Marasmius rotula 25 



Merulius lacrymans 43 



Morchella esculenta 55 



