Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections

Florissantia speirii

Synonymy list
YearName and author
1992Florissantia speirii Manchester

Is something missing? Join the Paleobiology Database and enter the data


If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

S. R. Manchester 1992Pedicel 0.6-1.0 mm thick, up to 38 mm long. Calyx 23-54 mm diam, gamosepalous, shallowly campanulate, membranaceous, five-parted; lobes rounded to pointed, with prominent radiating reticulate venation. Calyx incision 20%-35%, with lobes varying from well developed, givng a five-lobed outline, to poorly developed, giving a pentagonal to nearly orbicular outline. Corolla absent. Androgynophore forming a thick circular to rounded-pentagonal disk 2.4-4.0 mm diam, upon which the ovary is seated. Ovary superior, obovate, rounded to five-angled in transverse view, with a single style about 11 mm long, exserted beyond the stamens, and five short stigmas. Androecium consisting of ten anthers borne on five bifurcate filaments that appear to arise/diverge from the apical 3/4 of the ovary (i.e., the basal portion of the androecium is a tube fused around the ovary). Filaments 6-7 mm long, with large, globose anthers (2-3 mm long.). Pollen oblate, 27-32 micrometers equatorial diam., isopolar, radially symmetrical, tri-and tetracolporate, with short colpi. Amb circular to rounded-triangular or rounded-quadrangular. Exine 770 nm thick, ornamentation reticulate, with smooth muri and more or lee angular lumina 0.4-1.3 micrometer diam., decreasing in size outward from theh poles. Foot layer 230-280 nm thick. Fruit consisting of the enlargered ovary and the persistent calyx and pedicel. Fruit body longer than wide, with five longitudinal ridges that meet at the apex, pentagonal in transverse view, 8-11 mm diam, 9-12 mm high.