Monocot Pseudanthia Revisited: Floral Structure of the Mycoheterotrophic Family Triuridaceae

@article{Rudall2003MonocotPR,
  title={Monocot Pseudanthia Revisited: Floral Structure of the Mycoheterotrophic Family Triuridaceae},
  author={Paula J. Rudall},
  journal={International Journal of Plant Sciences},
  year={2003},
  volume={164},
  pages={S307 - S320}
}
  • P. Rudall
  • Published 1 September 2003
  • Biology
  • International Journal of Plant Sciences
The floral units of Triuridaceae, commonly regarded as flowers, may equally plausibly be interpreted as pseudanthia, i.e., modified and highly reduced partial inflorescences. This hypothesis is new for Triuridaceae, but earlier authors have noted strong similarities between the inflorescences of Cyclanthaceae and Pandanaceae (Pandanales) and the putatively pseudanthial floral units of some Alismatales (e.g., Potamogeton). The morphology of the floral units of Triuridaceae, particularly the… 
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References

SHOWING 1-10 OF 117 REFERENCES
New evidence for the reconciliation of floral organisation in Pandanaceae with normal angiosperm patterns
TLDR
The floral structure as ascertained from the earliest primordial stages, however, is consistent with the normal type in Monocotyledonae, and need not be interpreted as a proto-flower or pseudo-flower, a concept which has been suggested.
Phylogenetic studies in the monocot subclass Alismatidae: evidence for a reappraisal of the aquatic order Najadales.
TLDR
Analysis of DNA sequence data from the chloroplast gene rbcL indicate that Najadaceae have a much closer phylogenetic relationship to Hydrocharitaceae than to families of the "Najadales" (Cymodoceaceae, Potamogetonaceae, Ruppiaceae, Scheuchzeriaceae), and this association supports previous studies based upon examination of floral structure and seed coat anatomy.
Carpellodes or staminodes? Problems in the genus Pandanus (Pandanaceae), and their taxonomic significance
TLDR
The staminodes and carpellodes of the male flower of Pandanus palustris and that of P. barklyi are of taxonomic value, since they vary markedly between the species, though their main structure is similar within each section.
Floral organogenesis of Echinodorus amazonicus Rataj and floral construction of the Alismatales
TLDR
General features of the flowers of the Alismatales are summarized in developmental fashion which includes the mature flower as a final stage, and all alismatalean flowers appear to be characterized by antipetalous stamen (or staminodial) paris.
A Reconsideration of the Evolutionary Status of the Family Pandanaceae and its Significance in Monocotyledon Phylogeny
  • B. C. Stone
  • Environmental Science
    The Quarterly Review of Biology
  • 1972
TLDR
The phylogenetic position of the monocotyledons, in general, and of the family Pandanaceae, in particular, does not appear as advanced as some recent authors have suggested, although a return to the Englerian position is not recommended.
Floral morphology and development in Dioscoreales
TLDR
Non-volatile structures, such as reflexed stamens with a prolonged connective, umbrella-like stigmas and an urceolate floral chamber occur commonly within this group, and may provide phylogenetically informative characters.
Flower structure and development of Araceae compared with alismatids and Acoraceae
TLDR
Developmental findings support the isolation of Acorus from Araceae, and show similarities of Araceae with Potamogetonaceae and ofAcorus with Juncaginaceae.
Triuridaceae fossil flowers from the Upper Cretaceous of New Jersey.
TLDR
Phylogenetic analyses of morphological data from a broad sample of extant monocots confirm the affinities of the fossils with modern Triuridaceae, supporting the interpretation that the extinct plants were also achlorophyllous and saprophytic.
Flowers in Magnoliidae and the origin of flowers in other subclasses of the angiosperms. I. The relationships between flowers of Magnoliidae and Alismatidae
TLDR
Comparative ontogenetic studies reveal that the paired arrangement of stamens can be derived from the early stages of a spiral androecium following a perianth consisting of trimerous whorls.
Morphology and development of the reproductive shoots of Lilaea scilloides (Poir.) Hauman (Alismatidae)
TLDR
A review of past literature includes a clarification of some persistent errors which have confused the taxonomic position of the plant and the morphological interpretation of the reproductive appendages.
...
1
2
3
4
5
...