Vice-President’s Address. 223 
NOTES ON THE FLORA OF THE VARIOUS DIVISIONS 
OF BRITISH CARBONIFEROUS ROCKS. 
LOWER CARBONIFEROUS. 
General Remarks.—The flora of the Lower Carboniferous 
is much more scanty than that of Upper Carboniferous 
rocks. 
The prevailing species is Lepidodendron Veltheimianum, 
Sternb., which is most abundant, and occurs in all conditions 
of growth and age. The genus Sigillaria is much less 
frequent. Lepidophloios also is present. The ferns are 
generally characterised by having more or less distinctly 
cuneate or very narrow linear pinnules, in distinction to the 
round-lappeted pinnules of the majority of Upper Carbonifer- 
ous ferns. <Asterocalamites is distributed throughout the 
whole of the Lower Carboniferous, but Calamites is extremely 
rare, only two specimens of this genus having yet come under 
my notice from rocks of this age. 
I. CALCIFEROUS SANDSTONE SERIES. 
The two most characteristic ferns of the Calciferous 
Sandstone Series are Calymmatotheca affinis, L. and H. sp., 
and Calymmatotheca bifida, L.and H.sp. These are frequent 
in their occurrence, and not restricted to any particular bed. 
The following ferns, though much less common, have 
hitherto also only been found in this series :—Alcicornopteris 
convoluta, Kidston, Adiantides antiquus, Ett. sp., Rhacopteris 
Jlabellata, Tate sp., Rhacopteris Geikiet, Kidston, Rhacopteris 
subcuneata, Kidston, Sphenopteris pachyrrachis, Gopp., Sphen. 
subgeniculata, Stur sp., Sphen. Macconochti, Kidston sp., 
Sphen. Teiliana, Kidston, Sphen. Machanekit, Ett. sp., Sphen. 
Moravica, Ett. sp., Sphen. Hochstetteri, Stur sp., and 
‘Caulopteris minuta, Kidston. 
Among the Lycopods Lepidodendron Volkmannianum, 
‘Sternb., and Lepidostrobus jfimbriatus, also appear to be 
restricted to this horizon. 
