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Archaestella
Genus Archaestella Mas. Takah., Herendeen, X.-H. Xiao J. Pl. Res. [6]. 11 May 2017
- Name
- Archaestella
- Rank
- Genus
- Authors (Pub.)
- Takahashi M.
Herendeen P. S.
Xiao X.-H.
- Publication
- Two early eudicot fossil flowers from the Kamikitaba assemblage (Coniacian, Late Cretaceous) in northeastern Japan [2017/5]
- Journal
- Journal of Plant Research
- Page number
- [6]
- Year
- 2017
- Parent Taxon
- [Order] Trochodendrales
- Fossil Status
- flowers
- Type
- Archaestella verticillata
- Diagnosis
- Flower actinomorphic, bisexual, semiinferior, and multi-carpellate. Floral receptacle concave, with a perigynous perianth consisting of several tepals, borne around the rim. Androecium consisting of ca. 120 stamens with clear differentiation into anther and filament. Gynoecium consisting of a whorl of 10 conduplicate, laterally connate but distally distinct carpels with a conspicuous dorsal bulge, including a small central cavity. Styles recurved with papillate and ventrally decurrent stigma. Ovules ca. 10 per carpel, marginal, pendulous from the broad, concrescent oblique summit of the locule. Seeds with chalazal, apical and lateral wing-like extensions. Pollen grains, tricolpate, with reticulate exine pattern.
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