BULLETIN 175, TJ. 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. 



Agaricus arvensis 32 



Agaricus campestris 32 



Agaricus placomycea. . . 32 



Agaricus rodmani 33 



Agaricus silvicola 33 



Agaricus sub rufescens.. 33 



Amanita caesarea 7 



Amanita muscaria 7 



Amanita phalloides 8 



Amanita rubescens 8 



Amanita solitaria 9 



Amanita strobiliformis . 9 



Amanita vema 9 



Amanitopsis farinosa. . . 9 



Amanitopsis vaginata.. 10 



Armillaria mellea 12 



Armillaria nardosmia . . 12 



Armillaria ventricosa . . 12 



Boletus bicolor 38 



Boletus cbrysenteron . . 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 



Cantbarellus cibarius . . 14 

 Catastoma circumscis- 



sum 51 



Claudopus nidulans 27 



Clavaria pistillaris 46 



Clitocybe ametbystina. 14 



Clitocybe dealbata 14 



Clitocybe illudens 15 



Clitocybe laccata 15 



Clitocybe monadelpha . 15 

 Clitocybe multiceps ... 15 

 Clitocybe ocbropur- 



purea 15 



Collybia butyracea 18 



Collybia dryopbila 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 



Cyatbus stercoreus 53 



Cyatbus striatus 53 



Cyatbus vernicosus 53 



Daedalea quercina 42 



Dictyopbora duplicata. 48 

 Dictyopboraravenelii.. 48 



Entoloma grayanum 28 



Exidia glandulosa 45 



Fistulina bepatica ..... 42 



Fomes applanatus 40 



Fomes lucidus 40 



Galera tenera 31 



Geaster bygrometricus . 51 

 Guepinia spatbularia . . 46 

 Gyromitra esculenta ... 55 

 Hirneola auricula-judae 45 

 Hydnum coralloides ... 43 

 Hydnum erinaceum ... 43 

 Hydnum imbricatum . . 44 



Hydnum repandum 44 



Hydnum septentrionale 44 

 Hygropborus chrysodon 24 

 Hygropborus coccineus. 24 

 Hygropborus conicus. . . 24 

 Hygropborus ebumeus. 24 

 Hygropborus bypotbe- 



jus 24 



Hypboloma appendicu- 



latum 34 



Hypboloma perplexum 35 

 Hypboloma sublateriti- 



um 35 



Itbypballusimpudicus. 48 

 Irpex fusco-violaceus . . 44 

 Lactarius cbelidonium. 20 

 Lactarius deceptivus. . . 21 



Lactarius deliciosus 21 



Lactarius f umosus 21 



Lactarius indigo 21 



Lactarius piperatus 22 



Lactarius torminosus 22 



Lactarius volemus 22 



Lentinus lecomtei 26 



Lentinus lepideu3 26 



Leotia chlorocepbala. . . 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 

 Marasmiuscobaerens... 25 



Marasmius oreades 25 



Marasmius rotula 25 



Merulius lacrymans 43 



Morcbella esculenta 55 



