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A note on aggregate rays of Betula species


IAWA Bulletin 4(2/3): 183-185
A note on aggregate rays of Betula species
Observations were made on the presence of aggregate rays in four birch species: Betula pendula, B. pubescens, B. tortuosa, and B. nana. Aggregate rays rarely occur in Betula. However, when present, their occurrence is probably due to insect injuries (pith flecks) and branch traces.


Accession: 001039089

DOI: 10.1163/22941932-90000411



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