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THE IDENTIFICATION OF BETULA NANA POLLEN
Author(s) -
BIRKS H. J. B.
Publication year - 1968
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1968.tb06386.x
Subject(s) - pollen , botany , biology
S ummary There are three approaches to the problem of distinguishing the pollen of Betula nana . Grain morphology is not considered a reliable criterion. Size measurements alone serve to distinguish B. nana pollen from B. tortuosa , whilst the grain diameter: pore depth ratio distinguishes B. nana from B. pubescens . Reliable separation of B. nana pollen from tree birch pollen requires both these parameters.