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SYNCOTYLY IN QUERCUS ARIZONICA
Author(s) -
Mogensen H. Lloyd
Publication year - 1970
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1970.tb09925.x
Subject(s) - biology , embryo , botany , morphology (biology) , tree (set theory) , anatomy , zoology , genetics , mathematics , mathematical analysis
An investigation was made concerning the gross morphology and the internal anatomy of Quercus arizonica embryos. It was found that the percentage of fused‐ and separate‐cotyledoned embryos varies from tree to tree. Fusion of the cotyledons is congenital. Intermediate stages of fusion occur. The vascular pattern is the same in both fused‐ and separate‐cotyledoned embryos. The number of cotyledonary traces varies in both types of embryos. The relationship of the single‐cotyledoned embryo of Quercus to the origin of monocotyly is discussed.