Anatomy of Adenophorus sarmentosus— WILSON and Rickson 
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FIG. 1 . Adenophorus sarmentosus. 1 , Habit X Vs\ 2, habit showing vegetative reproduction by root prop- 
agules, X l A‘, 3, frond, X 4, portion of frond showing venation, X 3 V 2 ; X cross-section of stele of 
rhizome X 100; A cross-section of stele of root, X 100; 7, cross-section of stele of petiole, X 100; 8, rhizome 
scale, X 17; 9, cross-section of lamina, X 100 (stippled portions indicate cut surfaces); 10, upper epidermal 
cells, X 100; 11, lower epidermal cells, X 100; 12, epidermal hairs, X 100. 
successive leaf traces, showing no particular 
relation with the vascular supply to the leaf 
(Figs. 2, 13-16). The orientation of the root 
traces is horizontal as they arise from the stele 
as well as during their course through the cortex. 
The leaf gaps do not become closed in all cases 
before the departure of the next leaf trace. In 
our material the gap was observed to close in 
the lower portion of the rhizome (Figs. 2, 
10-12), while in the upper portions no such 
closure was observed (Figs. 2, 19-31). 
The stele is surrounded by an endodermis 
composed of small, thin-walled cells with con- 
spicuous, bright-staining Casparian strips on the 
radial walls. In all of our material the stele is 
pulled away from the outer tissues of the stem 
at the region of the endodermis (Fig. 1, 3 ). 
This separation results in the destruction of 
most of the endodermal cells and apparently 
is caused by the differential action of killing 
and fixing agents on the tissues of the stele 
versus the surrounding cortical tissues. 
The cortex is composed of 10-12 layers of 
cells. The cells of the innermost 5-7 layers con- 
sist of heavily thickened, often completely oc- 
cluded, sclerenchyma cells. However, patches 
