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THE COMPARATIVE MORPHOLOGY OF THE CANELLACEAE. II. ANATOMY OF THE YOUNG STEM AND NODE
Author(s) -
Wilson Thomas K.
Publication year - 1965
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.1537-2197.1965.tb06797.x
Subject(s) - biology , anatomy , morphology (biology) , sieve tube element , evolutionary biology , botany , zoology , phloem
The anatomy of the young stem and node was investigated in 12 species representing all 6 genera of the Canellaceae. The salient anatomical features of this family are as follows: (1) the primary vascular system is pseudo‐siphonostelic; (2) druse‐type calcium oxalate crystals and ethereal oil cells are characteristic of the parenchymatous tissues; (3) all members of the family exhibit trilacunar nodes; (4) the periderm is superficial in origin with characteristic U‐shaped thickened cells; and (5) the sieve‐tube members are of a primitive type with obliquely oriented end walls and many unspecialized sieve areas. On the basis of this anatomical investigation, the conclusion that the Canellaceae has a general ranalean affinity is strengthened.