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1
American Journal of Botany
associated with an increase of fifty percent in the number of cotyledons and
leaves. The distributions show, however, that this is only an incomplete, and to
some extent an erroneous, statement of the condition. In the dimerous seedlings
the ...
2
Flowers on the Tree of Life
ancestor of mesangiosperms (Figs 4.1B, 4.2B, 4.4), but their merism is equivocal:
either dimerous or trimerous. In Ranunculales, if eudicots were originally
dimerous, Papaveraceae retain the ancestral state, and a reversal to trimery
occurred ...
Livia Wanntorp, Louis P. Ronse De Craene, 2011
3
Proceedings of the National Academy of Sciences of the ...
The modal number of primary double bundles in the region of transition from root
to stem structure at the base of the hypocotyl is four in the dimerous and six in the
trimerous and hemitrimerous seedling. In the normal seedlings more than four ...
4
Text-book of Botany: Morphological and Physiological
But other dimerous and tetramerous flowers exhibit a more considerable
deviation from the type, inasmuch as the two dimerous perianth-whorls which
develope as if they were a tetramerous calyx or corolla are followed by a staminal
whorl ...
Julius Sachs, Sydney Howard Vines, 1882
5
Homoplasy: The Recurrence of Similarity in Evolution
Dimerous androecia may be homoplastic in Piperaceae. amerous (Zippelia,
Piper) to trimerous (Macropiper) and dimerous (Peperomia, Pothomorphe). They
mapped the separate origin of dimerous androecia in Peperomia and
Pothomorjfloe ...
Michael J. Sanderson, Larry Hufford, 1996
In the Ranalean complex, however, co-occurrence of the pentamerous, trimerous
, as well as dimerous condition has been observed, and sometimes even in the
same individual. For example, almost all genera of the Berberidaceae have a ...
Bharati Bhattacharyya, 2005
7
Floral Diagrams: An Aid to Understanding Flower Morphology ...
Clematis with a dimerous perianth, a whorled arrangement of outer stamen
whorls and a transition to a spiral arrangement in the gynoecium (Ronse De
Craene and Smets, 1996a; Ronse De Craene, Soltis and Soltis, 2003). The
flowers often ...
Louis P. Ronse De Craene, 2010
8
Annual Plant Reviews, The Evolution of Plant Form
Another change that may have occurred on the line to eudicots but was not
recognized until recently is a shift from trirnerous to dimerous flowers, with parts
in whorls of two (Drinnan et al. 1994; Endress & Doyle 2009). It is equivocal
whether ...
Barbara A. Ambrose, Michael D. Purugganan, 2012
9
Flowering Plants. Eudicots: Berberidopsidales, Buxales, ...
Characters such as the dimerous floral structure, known from Gunnera, and
presumably plesiomorphic traits (decurrent stigmas, antepetalous stamens, etc.),
known from other basal eudicot families such as Proteaceae and Sabiaceae, are
not ...
Klaus Kubitzki, C. Bayer, P.F. Stevens, 2007
10
Phytography as a Fine Art
4a. dimerous whorls. The first whorl is placed transversely. Casually in some
flowers of Irideae. 4b. trimerous whorls. One of the three members of the first
whorl is placed in the median plane, either adaxial (Bambusa) or abaxial (
common ...
Jan Willem Moll, Johannes Cornelis Schoute, 1934
