INDEX 
Achillea ptarmica, 23 
Aecidium hydnoideum, 34 
Agaricus campestris, 9 
Agrostis borealis, 34 
Amanita ovoidea, 23, 51 
plates, 126 
Anellaria separata, 23 
Anomalae 53; 71, 113 
Aposphaeria fibriseda, 23 
Artemisia carruthii, 23 
dracunculoides, 23 
glauca, 23 
Arthonia quintaria, 23 
radiata, 23 
Asteromella asteris, 38 
Betula alba, 24 
Bolbitius vitellinus, 24 
Boletinus cavipes, 38 
Boletus retipes, 24 
scaber, 34 
subaureus rubroscriptus, 34 
Calosphaeria myricae, 24 
Calvatia rubroflava, 24 
Chestnut bark disease, 7 
Chrysothamnus pinifolius, 24 
Cladochytrium alismatis, 24 
Cladonia cristatella vestita, 34 
Clavaria grandis, 24 
obtusissima, 39 
minor, 34 
subcaespitosa, 39 
vermicularis, 24 
Clitopilus leptonia, 39 
subvilis, 40 
vilis, 40 
Coccineae, 65, 99 
Collema crispum, 24 
Collybia murina, 25 
Coronopus procumbens, 25 
Coryneum effusum, 40 
133 
Crataegus, 6, 9, 53-124 
acclivis, 65, 99 
acerba, 61, 92 
acuminata, 62, 94 
admiranda, 74, 121 
affinis, 72, 114 
ambrosia, 73, IIg 
amoena, 56, 82 
anomala, 67, 105 
arcana, 56, 79 
arduennae, 53, 76 
aridula, 58, 88 
aristata, 56, 83 
ascendens, 62, 94 
asperifolia, 72, 116 
balkwillii, 73, 119 
barbara, 55, 78 
barryana, 61, 93 
beata, 56, 80 
beckiana, 75,123 
beckwithae, 91 
bella, 63, 96 
benigna, 65, 98 
bissellii, 69, 108 
boothiana, 62, 94 
brachyloba, 71, 113 
brevipes, 59, 88 
bronxensis, 58, 87 
brownietta, 55, 78 
caesariata, 69, 108 
calvinii, 74, 120 
casta, 57, 86 
celsa, 54, 76 
cerasina, 54, 76 
champlainensis, 67, 104 
chateaugayensis, 71, 113 
claytoniana, 64, 98 
clintoniana, 57, 87 
cognata, 57, 86 
colorata, 61, 92 
comans, 73, 118 
compta, 60, 92 
