FLORA OF THE CARBONIFEROUS PERIOD. 440 



Areoles elongate, ovate, acute at both end?, with a ridge along 

 the middle, terminating in a single elevated vascular scar at the 

 upper end. In certain states the vascular mark appears in the 

 middle of the areole. In young branches the areoles are contigu- 

 ous and resemble those of L. elegans. In old stems they become 

 separated by spaces of longitudinally wrinkled bark ; in very old 

 stems these spaces are much wider than the areoles. 



Leaves linear, one inch or more in length, usually reflected, one- 

 nerved. 



Cones (Lepidostrobi) terminal, short cylindric, with numerous 

 short acute triangular scales. 



Structure of stem — a central pith with a slender cylinder of 

 scalariform vessels, exterior to which is a thick cylinder of cellular 

 tissue and bast fibres, and a dense outer bark. 



Variety verticillatum has the areoles arranged in regular de- 

 cussate whorls instead of spirally. This difference, which might 

 at first sight seem to warrant even a generic distinction, is proved 

 by specimens in my possession to be merely a variety of phyllo- 

 taxis. 



This species is eminently characteristic of the Lower carboni- 

 ferous coal measures ; and has not yet been found in the Middle 

 coal formation. Fragments of bark resembling that of this species 

 occur in the coal formation of Bay de Chaleur, along with 

 leafy branches of Lepidodendron, which resemble those of this 

 species, though I believe distinct. 



2. L. Pictoense, s. n. • 



M. C. Sydney, R. Brown ; Pictou, H. Poole and J. W. D. ; 

 Grand Lake, C. F. Hartt. 



Areoles contiguous, prominent, separated in young stems by a 

 narrow line, long oval, acuminate, breadth to length as 1 to S ox- 

 less, lower half obliquely wrinkled, especially at one side. Middle 

 line indistinct. Leaf scar at upper end of areole, small, triangular,, 

 with traces of three vascular points, nearly confluent. Length of 

 areole about 0.5 inch. 



Leaves contracted at base, widening slightly and gradually con- 

 tracting to a point, ribs three, central distinct, lateral obscure? 

 length 1 inch. 



Cones borne on sides of smaller branches, small, oval, obscurely 

 scaly. 



Can. Nat. 30 Vol. VIII. 



