Lusistemon K.R.Pedersen, Balthazar, P.R.Crane et E.M.Friis
Plant Fossil Names Registry Number: PFN002029
Act LSID: urn:lsid:plantfossilnames.org:act:2029
Reference: Pedersen, K. R., von Balthazar, M., Crane, P. R. & Friis, E. M. (2007): Early Cretaceous floral structures and in situ tricolpate-striate pollen: New early eudicots from Portugal. – Grana 46(3): 176–196.
Page of description: 178
Lusistemon striatus K.R.Pedersen, Balthazar, P.R.Crane et E.M.Friis
Staminate flower with six small tepals and six stamens of different sizes and apparently placed opposite the tepals. Anthers basifixed, attached to filament without distinct joint; filaments free from each other. Anthers dithecal and tetrasporangiate; thecae placed laterally; anther dehiscence by longitudinal slits. Connective poorly developed between thecae, but extended apically into a short protrusion. Pollen tricolpate, tectate and striate with dichotomising and sometimes anastomosing muri that are ornamented with minute, transversely oriented ridges. Infratectal layer thin, granular and forming a fine internal reticulum; foot layer thin.
Composed of Lusitania (old Roman name for Portugal) and stemon (gr. thread) referring to the staminate nature of these Portuguese fossil flowers.