328 HETEROMOKPHy. 



In some varieties of Godioemn variegatum the leaves 

 resemble those of Nepenthes, as the basal portion is 

 broad, and terminates in a projecting midrib destitute 

 of cellular covering, and this again terminates in a 

 small pouch or pitcher. Somewhat similar varia- 

 tions may be found in ferns, especially Scolopencbium 

 vulgare. 



Instead of the pouch there is formed sometimes in 

 the plant last mentioned a supplementary four-lobed 

 lamina, tlie four lobes being in two different planes, 

 and diverging from the midrib, so that the section 

 would resemble |x^ , the point of intersection of the 

 X representing the position of the midrib. This four- 

 winged lamina is thus very similar to the four- winged 

 filaments described and figured at p. 289, and to the 

 leaf-like anther of Jatropha described by M. Miiller, 

 p. 255. 



Cornute leaves (Folia cornuta). The condition to 

 which this term applies is that in which the midrib, 

 after running for a certain distance, generally nearly 

 to the point of the leaf, suddenly projects, often in a 

 plane different from that of the leaf, and thus forms a 

 small spine-like out-growth. Should this happen to be 

 terminated by a second laminar portion, an interrupted 

 leaf would be formed. In Scolopendnum vulgare and 

 other ferns this condition has been noticed, as also 

 in some of tlie varieties of Codixeum variegatum already 

 referred to. 



Flattening. There are some plants whose stem or 

 branches, instead of assuming the ordinary cylindrical 

 form, are compressed or flattened; such are some species 

 of Epipliyllnm, Coccoloba, Bauhinia, &c. The same 

 thing occurs in the leaf-like branches of RuscuSy the 

 flower- stalks of Xylophylla, Phi/UantJms, Pterisanthes. 

 Martins proposes to apply the word * cladodium' to such 

 expansions, just as the term phyllodium is applied to 

 the similar dilatation of the leaf-stalks. If we exclude 



