Sie ey gira 5 Cis ar A se a 4 ee . 
ee oy CO ‘s tructural Lua Physiolegical Botany. 
re | ticed cells, the partition-walls of which are not coe per a 
-*  forated, but only thickened in a sieve-like manner. Both | ‘ 4 
i contain as a rule a turbid granular sap, are mostly associated 
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Buy fic, 75.—Vesicular raceel with raphe Fic. 76. — Laticiferous vessel from is 
Py ae ides (7), and contiguous cells a and Euphorbia splendens, with rod« and - 
6; from the stem of a Tradéscantia. bone-shaped granules of starch float-’ ")\. am 
Sa 300.) ing in the latex. (x 250.) ae 
' 2 ‘in bundles, and take part in the formation of the ie 
| an, -yascular bundle as sof¢ bast. , - 
_—--- Vesicular vessels axe distinguished from sieve- -tubes by | 
a their contents and situation. The contents are clear ee 
ae milky, but always include bundles of acicular crystals <a 
| (raphides). Their cells, which are moderately thin- newalled ia 
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