Sassafras officinale, Nees 106

BISHOP, J. N. v

Celtis occidentalis, L. 100

Fraxinus Pennsylvanica, Marsh. 164

Fraxinus Pennsylvanica, _var._
lanceolata, Sarg. 166

Juglans nigra, L.
(_in lit._, 1896) 48

Morus rubra, L. 102

Populus heterophylla, L. 33

Quercus Muhlenbergii, Engelm. 84

Thuja occidentalis, L. 23

BISSELL, C. H. v

Crataegus Crus-Galli, L. 117

Pinus sylvestris, L.
(_in lit._, 1899) 12

Prunus Americana, Marsh.
(_in lit._, 1900) 123

Rhus copallina 137

BRAINERD, EZRA Carya porcina, Nutt. 53

Crataegus punctata, Jacq. 118

Ulmus racemosa, Thomas 99

BREWSTER, WILLIAM Pinus Banksiana, Lamb 8

BRITTON, NATHANIEL LORD Acer Saccharum, _var._ nigrum 172

BROWNE, D. T. Ilex opaca (_Trees of North
America_, 1846) 139

_Bulletin Torrey Botanical Club_, XVIII, 150

Pinus Banksiana, Lamb 8

CHAMBERLAIN, E. B. Ulmus fulva, Michx. (1898) 97

CHURCHILL, J. R. Prunus Americana, Marsh. 123

COLLINS, J. F. v
Gleditsia triacanthos, L. 129

DAME. L. L. Crataegus Crus-Galli, L. 171
Salix fragilis, L. (_Typical Elms and
other Trees of Massachusetts_,