Image from the Biodiversity Heritage Library.
Contributed by Harvard University Botany Libraries.
| www.biodiversitylibrary.org
Transcription
B. alba, var. minor, nta-
471a Balba, var. cordifolia . C. P.D. Rdu L, cse. Var.
mixt-
471b B. pendula, C.
B. fumila - BR-
B- glaudulosa, satund , 2 forme nta -
Dak. D. & R. Bic Pacé DR.