DESCK T PT I V E CATALOG t:E 



slender for a plant of the si/e, the xylem measuring only 2 mm. 

 in radial thickness ; the phloem is relatively thick, and appears 

 to be 4 mm. in radial extent, so far as can be judged from the 

 polished surface. 



The leaf-traces arise as curved single bundles, completely 

 breaking through the stele, in which they leave gaps. In the 

 wide cortex the leaf-traces are very conspicuous and soon curve 

 into a deeply arched horseshoe, which breaks up to form almost 

 a ring of bundles (see text-fig. 14). 



* 



It 



Ifc 



Text-fig. 14. /Jrnne/ftfes m(rrinn<t, Carr. Drawing of part of tlie out 

 surface of t lie trunk. j>.. pith : . , xylem: ph.. phloem ; //., leaf'-tnu-*- ; 

 lb., leal-bases weathered out in the outer, waterworn surface. X about 

 \ nut. size. 



The specimen is not cut to show the tangential arrangement 

 of the leaf-base bundles, and one can only guess at the cones. 



COMPAKISON WITH OTHER SPECIES. As Carruthers himself 

 points out (1870, p. 699), this specimen recalls B. tiaxlyanus 

 in many ways. Without sections to show the internal anatomy, 

 detailed comparisons are impossible, biit it is immediately 

 noticeable that though the trunk is much larger than in B.Sax- 

 lnjanutt (measuring 30 cm. as against 2-3 em. of the latter 

 species), yet the woody cylinder is strikingly slender, and 

 measures only '2 mm. in the xylcin zone. Jn B. Gilsoniamis, 



