R. B. Pike

COMMON TREES OF PUERTO RICO AND THE VIRGIN ISLANDS

R. B. Pike, 1965 .

EVIDENCE FOR THE HYBRID STATUS OF ASTER-X-BLAKEI-D

R. B. Pike, 1970 .

THE VASCULAR FLORA OF KENT ISLAND GRAND MANAN NEW-BRUNSWICK

R. B. Pike, A. Hodgdon, J. McCain, 1973 .

Changes in flora of the Machias Seal Islands

R. B. Pike, A. Hodgdon, 1962 .