Genus Statice as represented at Blakeney Point. I. 277 
aerating tissue (a.co.), precisely similar to that of Salicornia } or of the salt 
marsh species of Statice. This aerenchymatous cortex is in obvious relation 
to the habitat of the plant in lows, the soil of which must often be water- 
logged for considerable periods. A broad zone of periderm encircles the 
cortex. Throughout the greater part of the root no sclerenchyma or 
sclereides occur, but near the junction with the stem nests of sclereides 
develop mostly in a single series immediately beyond the phloem zone. 
(set . , Text-fig. 26, b). 
Text-FIG. 26. Diagram of a transverse section of a root of S. bellidifolia. A = young root, 
x 43 ; B = old root near its junction with the stem. x 60 ; pxy . = protoxylem ; xy. — secondary 
xyltm \ m ph. — secondary phloem ; a.co. = aerating cortex ; m.r. — medullary ray ; set. — sclereide 
nest ; per. — periderm. 
2. The Stem . 
The stem of S. bellidifolia is short and more completely embedded in 
the mud than in 5 . binervosa . The distribution of the tissues is shown in 
Text-fig. 28. The pith (/.) is large, and contains nests of sclereides ( self 
though they are less abundant than in binervosa (cf. Text-fig. 14, B). 
The vascular bundles are broken up into a few large wedges by very wide 
medullary rays ( m.r .), which only occur at the point of exit of leaf-traces 
(/./.). The xylem contains comparatively few vessels, but numerous fibres ; 
the size of the vessels and their markings are the same as those of the Main 
bank 5 . binervosa (see Table III, p. 263). The zone of secondary phloem 
( ph .) is wide, and consists chiefly of phloem parenchyma. The cortex, in 
which, as in the pith, the intercellular space system is well developed, shows 
no sclerenchyma and only a single series of sclereide groups, and the zone 
1 de Fraine, E. : The Anatomy of the Genus Salicornia. Journ. Linn. Soc. Bot., 1913, vol. xli, 
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