8
Pyrus sambucifolia, Cham.
& Schlecht 113
Quercus Muhlenbergii, Engelm 84

RAND, E. L. Pinus Banksiana 8

_Rhodora_, III, 234 Acer Saccharum, Marsh., _var._ barbatum,
Trelease 172
Acer Saccharum, Marsh., _var._ nigrum,
Britton 172

_Rhodora_, III, 58 Ilex opaca, Ait. 139

_Rhodora_, III, 234 Prunus Americana, Marsh 171

ROBBINS, JAMES W. Sassafras officinale, Nees 106
Ulmus racemosa, Thomas 99

ROBINSON, DR. B. L. vi

ROBINSON, JOHN Crataegus coccinea, L. (1900) 119

ROBINSON, R. E. Pinus Banksiana, Lamb 8

RUSSELL, L. W. Diospyros Virginiana. L. 161
Quercus palustris, Du Roi 92
Quercus stellata. Wang 77

SARGENT, CHARLES S. Crataegus coccinea, L. (_Botanical
Gazette_, XXXI, 12, 1901, by permission) 119
Crataegus mollis, Scheele
(_Botanical Gazette_. XXXI, 7, 223, 1901) 121

SETCHELL, W. A. Populus heterophylla. L. 33

STONE, W. E. Quercus palustris.
Du Roi (_Bull. Torr. Club_, IX, 57) 91

SWAN, DR. C. W. vi

TERRY, MRS. EMILY H. Picea alba. Link 17

TRELEASE, WILLIAM Acer Saccharum, Marsh., _var._ barbatum 172

TUCKERMAN, EDWARD Betula papyrifera, _var._ minor, Marsh. 68

WAGHORNE, A. C. Crataegus coccinea, L. (1894) 119

ABBREVIATIONS.

Ait.--Aiton, William.

Barratt, Joseph.
B. S. P.--Britton, Nathaniel Lord, Sterns, E. E., and Poggenburg,
Justus F.
Borkh.--Borkhausen, M. B.

Carr.--Carriere, Eli Abel.
Cham.--Chamisso, Adelbert von.
Coulter, John Merle.

DC.--De Candolle, Augustin Pyramus.
Desf.--Desfont