Fossil plants, Vol. 3

In the Preface to Volume II published in 1910 I rashly stated that it was my intention “to devote such space as is available within the limits of a text-book to the neglected su...

II. =MEDULLOSEAE= 86–165 i. _Medullosa_ 86–109, 156–163 _Myeloxylon_ 106–110; _Neuropteris_ 110–117; _Alethopteris_ and _Linopteris_ 113; _Trigonocarpus_ 117–124; _Codonotheca_...

B. =CORDAITEAE= 219–284 =Cordaites= 219–265 _Noeggerathiopsis_ 238–243; _Rhiptozamites_ 244, 245; _Phylladoderma_ 244; _Euryphyllum_ 245; _Artisia_ 246–248; _Dadoxylon_ 248–260;...

II. +Trigonocarpales+ 318–332 =Trigonocarpus= 319–321; =Tripterospermum= 321; =Ptychotesta= 321; =Hexapterospermum= 321–323; =Polypterospermum= 323; =Pachytesta= 323–326; =Steph...

Several of the illustrations are printed from blocks for which I am indebted to learned societies or to individuals. The sources from which clichés were obtained are mentioned w...

Among the fossil genera described in the last chapter of the second volume some were spoken of as true Ferns though most of them, it was added, ‘may safely be regarded as plants...

The genus _Lyginopteris_ is selected for the first place in this chapter simply on the ground that we have a fuller knowledge of its morphology than in the case of other types....

The term Medulloseae was first employed by Goeppert and Stenzel[236] for a family of Palaeozoic plants that appears to have reached its maximum development in the Permian period...

Before describing other genera represented by petrified vegetative organs exhibiting in their anatomical features points of contact with the Medulloseae, a short account is inte...

In this chapter are included several types represented by stems, but which in the absence of definite information with regard to the reproductive organs cannot be assigned to th...

In 1879 Renault[537] briefly summarised the anatomical features of some silicified vegetative shoots from the Permian of Autun for which he instituted a new family, the Poroxyle...

This generic name in the form _Pitus_ was first used by Witham[753] for some petrified pieces of large stems from Lower Carboniferous strata in the south of Scotland (Berwickshi...

Seeds are abundantly represented as fossils from Carboniferous to Post-Tertiary deposits. The importance of fossil and sub-fossil species in the later geological series has been...

of Lancashire described by Williamson[1023] as _Hexapterospermum Noeggerathi_ (fig. 506, H), and another British example is afforded by _Hexagonocarpus Hookeri_ Kidst.[1024], a...

The term Cycadophyta, suggested by Nathorst[1069], is used in a comprehensive sense to include both recent Cycads and the much larger number of extinct types which it is customa...

This genus was first figured by Young and Bird[1192] from specimens obtained from Lower Estuarine beds near Whitby: these authors compared the fossils to the head of an Artichok...

Most of the stems now under consideration are represented by casts or impressions and afford no information with regard to anatomical characters. They are in many cases more sle...

Occasional reference is made to Cycadean fronds in the account of flowers and stems but it is seldom that genera or species founded on leaves can be definitely correlated with p...