ANATOMY OF THE GENUS SALICORNIA. 335 
bifureation of the two leaf-traces increases the number to eight, immediately 
below the node the two entering leaf-traces increase the vascular strands to 
ten, but the number is soon reduced to six by the fusions above described. 
The vascular cylinder of the stem surrounds a pith composed of small 
parenchymatous cells; in most of the species it is of small extent, and is 
Fre. 9. 
i Wi lt i 
Men Е node а, 
iti ica 
EI , ч node lr 
: 
lta | lea 
2 | node с 
4 
| itt 
4% | Node a 
S. perennis, Mill. Primary vascular bundle system of the young stem. 
lt. = foliar trace. 
almost negligible compared with the ring of vascular tissue ; in the prostrate 
stem of S. Oliveri, however, it is of considerable extent, and frequently a 
medullary cavity is formed ; the contrast between the stem of this species and 
that of S. perennis and S. lignosa is in this respect very marked. 
2c2 
