ON THE AXATOMY OF MAUNOLIACE^ j^^C) 



ti.ssiie.s. In the jthloeiii of kadsiini and Schl:tui(lra tliere are found 

 nianv Jarge intercellular spaces, which are apt to be mistaken for some 

 kind of laroe ducts, but are really passages of lysigenetic origin. 

 They are on all sides bounded — and the boundaries nre often verv 

 irregular — by distorted and broken cells, and in sections cut from 

 specimens preserved in alcohol, they ai-e often found filled with a homo- 

 geneous, structureless sid)stance. The}^ seem to serve as reservoirs for 

 the nnicilage which ul)onnds in these plants, and wliich is probalilv 

 derived from tlie disorganization of the suriounding cells. They are 

 mo?t conspicuous in Kadsiini. The xylem consists of tracheae, filn-es, 

 and wood-parenchyma. The vessels are large, their diameter Ijeino- 

 several times greater than that of the surroundincj- tissue-elements, 

 especially in Kadsuni. The walls of the vessels are distinctlv sculptured 

 with bordered pits. The medullary rays mostly consist of a sinole- 

 row of cells. 



The pith consists of unlignified parenchymatous cells, amontj- 

 which may be found a few sclerenchymatous cells in Scliiidndra (PI. 

 IV, Fig. 15), and a few crystal-bearing ones in Kadmm. 



Vet'uAi'. — Unlike those of the stem the fibro-vasc;ilar bundles of 

 the j)etiole are so arranged as to present a somewliat semi-lunar form 

 with its concavity turned to the upper side of the [letiole (PI. IV, 

 Fig. 1(S). In a section cut from the upper or middle })ortion of 

 the petiole, these bundles lie in a few definite groups, as is 

 shown in the figure just referred to, (where three distinct groups are 

 seen) ; but in the basal portion they are more looseh* arranged. 

 There is not present either in the phloem or in its neighbourhood, the 

 common form of sclerencliymatous fibre or scleroblast ; l)ut scattered 

 about in the parenchymatous tissue surrounding the bundles there 

 are found the ci'vstal-bearing sclerenchymatous elements (V\. IV, Fiu-. 

 ly, 6'.s). In the case of Kadstira a single row of parenchymatous 



