A revision of ther English Weealden flora, I Charales-Ginkgoales

The Mesozoic Herbaceous Lycopsids

“…Fossils closely resembling anisophyllous selaginellaleans do not reappear significantly in the fossil record until the early Cretaceous, when there is evidence of considerable diversity. Watson's (1969) revision ol Selaginellites dawsoni from the English Wealden demonstrated heterospory and showed that the megasporangia had four megaspores. Material was not abundant, and no spore relationships were suggested.…”

Paleozoic Herbaceous Lycopsids and the Beginnings of Extant Lycopodium Sens Lat. And Selaginella Sens. Lat.

“…In contrast, thought. Darrah (1938), Lundblad (1950b, Townrow (1968), Schlanker & Leisman (1969), Watson (1969), andAsh (1972) used Selaginella for fossil shoots because they could not demonstrate any real morphological differences from the extant spe-FossiL Evidence for the Generic Assignment of The Extant Species of the Selaginellaceae Early classifications Wildenow cies of that genus. The problem of using generic Sprengel, 1827) placed Selaginella within the genames of extant plants for fossil specimens is a nus I jco/?oG?mm, though Spring (1850) presented major one encountered throughout palaeobotany the major monograph of the genus Selaginella as (e. g., Collinson, 1986).…”

Additions to the family Miroviaceae (Coniferae) from the Lower Cretaceous of West Greenland and Germany:Mirovia groenlandican. sp.,Tritaenia crassa(Seward) comb, nov., andTritaenia linkiiMägdefrau et Rudolph emend.

“…Leaf dimorphism is not known in T. crassa. Watson & Hall (1988) considered Abietites [inkii (Roemer), Pityophyllum crassum Seward and Pseudotorellia heterophylla Watson (1969) to be synonymous. The status of A .…”

“…In connection with the revival of Tritaenia, the nomenclatural and taxonomic status of its type species, T. linkii sensu Magdefrau et Rudolph, is discussed, as well as the status of T. crassa (Seward) comb. nov. in relation to the taxa Abierites linkii (Roemer) Dunker (1846), Pityophyllum, and Pseudotorellia heterophylla Watson (1969).…”