LYGOPODIALES— SUBSIGILLAELE— ASOLANUS. 239 



SiGlLLARIA (ASOLANUS) SIGILLAEIOIDES (Lx.). 



PI. LXX, Fig. 2. 



1879. Lepklopldoios ? sujiUarioides Lesquei'eux, Coal Flora, Atlas, p. 13, pi. Ixviii, 



figs. S, 8rt. 



1880. Lepidophloios sir/illarioides Lesquereus, Coal Flora, vol. ii, p. 425. 



Trunks large, the epidermis finely longitudinally shagreened over the 

 traces of broad, low, irregular, diagonal or longitudinal, irregularly meshed, 

 strandlike, very obscure ridges of the cortex ; bolsters usually distant, 

 aj)parentl)^ spirally arranged, small, very broadly obovate or obovate- 

 triangular, smooth, nearly covered by the leaf scar and two vertically 

 narrow fields, one superior and one inferior to the leaf scar; leaf scar on 

 the upper part of the small bolster, transversely rhomboidal, laterally acute, 

 the transverse diameter being greater than the width of the bolster, stib- 

 angular at the apex, slightly acute at the lower angle, the margins on either 

 side of the latter being distinctly concave; inferior field contiguous to the 

 lower borders of the leaf scar, equal or nearly equal to the latter in trans- 

 verse diameter, and having the lower margin rounded or nearly semicir- 

 cular; superior field very narrow vertically, extending nearly the whole 

 width of the scar, the middle portions of the sides nearly straight, the 

 medial angle rounded- tnmcate or even slightly emarginate, marked just 

 above the center by a minute punctiform trace; vascular cicatricule near or 

 a little above the middle of the foliar cicatrix, transverse, short; lateral 

 cicatricules linear-crescentic, arching outward, the upper ends close, near 

 the margin of the scar, the lower portions approaching nearly to the vascular 

 trace; subcortical phases and cones unknown. 



While examining the specimens in the Lacoe collection in the United 

 States National Museum I was much interested at finding three specimens 

 from the vicinit}'- of Clinton, Missouri, which had been identified by Pro- 

 fessor Lesquereux as Sigillaria fissa Lx. The inspection of one (No. 6660) 

 of these specimens revealed at once the general very close resemblaiice of 

 the parts connected with the leaf scar to the corresponding portions 

 of Sigillaria camptotcenia Wood. But my attention was at once engaged 

 by the similarity of the impression of certain portions of the cortex, in 

 which the bolsters were so flattened in the course of fossilization as to 

 partially cover the scars, to the structure figured in the Coal Flora from the 



