Part 5

PARLIN, J. C. Sassafras officinale, Nees (1896) 106

PRANTL, KARL VON v

PRINGLE, C. G. Pinus Banksiana, Lamb 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.--Desfontaines, Rene Louiche. Du Roi, Johann Philip.

Ehrh.--Ehrhart, Friedrich. Engelm.--Engelmann, George.

Gray, Asa.

Jacq.--Jacquin, Nicholaus Joseph.