PHYSIOLOGY. DAY 
run inastraight, though oblique and regular form, 
fig. 280. In the pink, (Dianthus caryophyllus), they 
are very straight, with straight and horizontally 
transverse branches, fig. 281. In almost every 
plant they have their certain and peculiar direction, 
which in each remains constantly the same. 
Si2an 
The cellular texture, (Tela cellulosa, s. utriculi, 
contexus cellulosus), signifies a very delicate mem- 
brane, which 1s divided into innumerable variously 
formed cells or little spaces, which are intimately 
connected with each other.. Some philosophers in- 
deed have considered those cells or vesicles as pe- 
culiar vessels. When this cellular ‘texture is very 
tense and succulent, we call it, especially m some 
fruits, flesh, (Parenchyma, pars carnosa, § 228). 
Pith is a more compact cellular web, which is 
distinguished by its bright white colour, by its 
smaller and more compressed cells, and by its spongy 
appearance. 
The communication of some of those vessels or 
their anastomosis differs in plants from that of ani- 
mals. For the adducent and air vessels always run 
along in bundles, which again divide themselves in 
smaller bundles. The smaller ones connect them- 
selves with larger, and again separate, to join others. 
The lymphatics on the contrary anastomose in plants 
in the same manner as in animals. ‘The vessels pro- 
ceed single for some way, and then divide into 
branches which communicate with one another, 
and with other vessels. 
QO § 138, 
