Journal ArticleDOI
Systematic Embryology of the Araceae
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Embryological data of systematic significance to the family Araceae are reviewed and analyzed, with special attention given to the determination of character-state polarities.Abstract:
Embryological data of systematic significance to the family Araceae are reviewed and analyzed, with special attention given to the determination of character-state polarities. Character-states considered primitive within the family include: presence of endothecial thickenings; binucleate, starchless pollen; anatropous, crassinucellate ovules with a thick nucellar cap and a single, unbranched funicular bundle; solanad or caryophyllad embryogeny; helobial endosperm development, with 2–8 cells in the chalazal chamber andab initio cellular division in the micropylar chamber; and endosperm present in ripe seeds. The phylogenetic implications of these conclusions are discussed, and promising avenues for future research are indicated.read more
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Classification and geography of the flowering plants
TL;DR: Thome, Robert F. as mentioned in this paper presented the latest revision of the classification of the Class Angiospermae and replaces my 1983 and more recent 1992 synopses. And a new phyletic "shrub" replaces earlier versions, and attempts to indicate visually relative sizes and relationships among the superorders, orders, and suborders.
Journal ArticleDOI
Microsporogenesis in Monocotyledons
Carol A. Furness,Paula J. Rudall +1 more
TL;DR: This paper critically reviews the distribution of microsporogenesis types in relation to recent concepts in monocot systematics and notes that simultaneous microsporaogenesis is of phylogenetic significance within some of these groups, for example, Asparagales, Dioscoreales and Poales.
Journal ArticleDOI
Gynoecium diversity and systematics in basal monocots
TL;DR: Gynoecium structure supports the isolated position of Acoraceae as sister to all other monocots, and in an overall view, if compared with all other families,Acoraceae clearly shows the greatest similarities with Araceae.
Journal ArticleDOI
Evolution of Endosperm Developmental Patterns among Basal Flowering Plants
TL;DR: It is discovered that differential developmental fate of chalazal and micropylar domains is a common pattern among the endosperms of all basal angiosperm taxa and suggested that this may be a feature of endosperm development in all angiosperms.
Journal ArticleDOI
Floral structure and development of Acoraceae and its systematic relationships with basal angiosperms.
Matyas Buzgo,Peter K. Endress +1 more
TL;DR: Developmental and morphological similarities seem to be closer between Acorus and Piperales than betweenAcorus and other magnoliids.
References
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Evolution of Dioecy in Flowering Plants
TL;DR: It is argued that dioecy is not as rare as is generally assumed and in certain regions, among certain life forms, more than one fourth of all species may be dioECious (see below).
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