part 8] 



CARBONIFEROUS PLANTS FEOM PERU. 



281 



presumably a ligule-pit. No vascular-bundle scars or parichnos- 

 scars can be detected. Sigillaria Brardi, although mainly a 

 Northern Hemisphere Upper Carboniferous species, is recorded 

 also from South Africa ^ and Brazil.^ Some of the numerous 

 specimens figured by E. Weiss as Sigillaria mutans Weiss ^ closely 

 resemble the small pieces shown in figs. 7 & 8. On the other hand, 

 comparison may equally well be made with species of Le])ido- 

 dendron from Lower as well as from Upper Carboniferous beds. 



Bothrodendron (?) 6fp. (Natural size.^ 



BoTHRODENDRON (?) sp. (PL XIII, fig. 9, and text-figure.) 



Although it is by no means certain that the specimens shown in 

 PL XIII, fig. 9 and in the text-figure belong to the same species, 

 they may be considered together and regarded as possibly specifically 

 identical, or at least very closely allied. The flattened piece of stem 



seen in fig. 9 is characterized 

 by the spirally-disposed and 

 widely-separated, slightly- 

 prominent leaf-scars. Most 

 of the surface is bereft of 

 any carbonaceous film, and 

 does not exhibit the original 

 surface - features ; but, on 

 the right-hand side, a thin 

 carbonaceous layer probably 

 represents the actual surface, 

 and on magnification the 

 outlines of cells are clearly 

 visible. The leaf- scars are 

 prominent, transversely 



elongated, and rhomboidal. 

 On the partly-decorticated 

 surface there are discon- 

 tinuous longitudinal ridges 

 and an irregular transverse 

 wrinkling, but on the carbonized film no wrinkling is seen. There 

 is 110 indication of any leaf -cushion, no ligular pit, and only a very 

 faint suggestion in a few of the scars of a median vascular scar. 

 The leaf-scars shown in the text-figure are rather more rounded, 

 and appear as slightly concave areas (not projecting as in PL XIII, 

 fig. 9). 



In the small and widely-separated leaf-scars these fragments 

 agree with Bothrodendron, BinaJcodendron, and Asolamis. The 

 form of the leaf-scar and the absence of a leaf-cushion are features 

 more suggestive of Bothrodendron. The last-named genus extends 

 from the Upper Devonian to the Upper Carboniferous. 



1 Seward (97) p. 326. 



2 White (08) p. 458. 



^ AVeiss (93) pp. 84 et seqq. 



