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Chemotaxonomy of the Hymenophyllaceae. II. C‐GLYCOSYLFLAVONES AND FLAVONE‐O‐GLYCOSIDES OF TRICHOMANES S.L.
Author(s) -
Wallace James W.
Publication year - 1996
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.1537-2197.1996.tb13914.x
Subject(s) - biology , botany , chemotaxonomy , taxonomy (biology)
An analysis of 23 species of Trichomanes s. 1. indicates that the presence of C‐glycosylflavones, especially mono‐C‐glycosylflavones, may be a basic characteristic for this genus. Except for the morphologically unique Cardiomanes reniforme , this feature appears to delimit the species of Trichomanes s. 1. from those of Hymenophyllum s. 1. Several species, primarily those classified within Didymoglossum (according to both Copeland and Morton), synthesize flavone‐O‐glycosides in addition to their C‐glycosylflavone profiles. Two species, T. birmanicum and T. radicans , appear to be unique in synthesizing the di‐C‐glycosylflavones violanthin and isoviolanthin; five species (T. collariatum, T. scandins, T. birmanicum, T. bicorne , and T. alatum ) appear to synthesize di‐C‐glycosylflavones but lack mono‐C‐glycosylflavones. Based on this and other studies, it may be appropriate to consider these C‐glycosylflavone‐producing plants as representing primitive leptosporangiate stock.