CYATHEAE 



605 



FIG. 336. 



Alsophila pruinata, Kaulf. Transverse sections ot stem, leaf- bases, and bud (a) in 

 Figs. 3 and 4 ; it is apparent that the axis is solenostelic, that the solenostele opens at 

 the exit of each leaf, and that the leaf-trace is a continuous horse-shoe at its base. (After 

 H. Karsten.) 



f a s 



FIG. 337 A. 



Cyathca Iinrayana, Hook. A = axile longitudinal section. Natural size. The section 

 was about ~\ mm. thick, and semi-transparent. The black stereom and paler vascular 

 strands drawn as superficial do not all lie exactly in the same plane. # = vascular strands 

 of the main cylinder; s = outer ; s' = inner plates of its sclerotic sheath ; internally to s', is 

 the pith with its medullary strands, outside s, the cortex with cortical strands ; r = 

 cortical bundles; b = leaf-scars ; /=strands passing into leaves; w = insertions of roots ; 

 w = a foliar strand running into the pith ; above .r a blind ending of a medullary bundle. 

 (After De Bary, from Engler and Prantl, Nat. Pflanzenfam.) 



