Genus StcUice as represented at Blakeney Point. /. 251 
of the leaf and scape by Chermezon, 1 S. bellidifolia also has apparently 
not been investigated. 
The Glands. 
The epidermal glands, which are so characteristic a feature of the 
order, appear to be identical in structure throughout the British species 
of Statice 9 and will therefore be considered together for the various forms 
of binervosa and for bellidifolia. 
The glands are of two distinct types, which apparently differ essentially 
in their structure, and which are differently distributed ; every transitional 
stage, however, exists between the two forms. 
Mucilage Glands. 
The first type was termed the mucilage gland by Wilson, 2 who de- 
scribed it as occurring in all the eight genera of the Plumbaginaceae, though 
not in all the species investigated by him. 
He states that it consists of a secreting head borne on a base con- 
sisting of relatively few stout walled cells. The secreting cells are 
numerous, and extremely thin walled, they are prismatic, columnar or 
conical in shape, and may or may not be divided by a few transverse 
septa; their contents are finely granular (Text-fig. 6 , A and B). He de- 
scribes them as occurring in the axils of the leaves, and regards them 
as functioning in the secretion of mucilage. He considers that the 
mucilage is for the purpose of protection, 3 its hygroscopic power being 
of service in attracting, storing and economizing atmospheric moisture, 
though at the same time he regards it difficult to explain its presence 
in the leaf rfNils of Armenia sp. and Statice sp., where the plants are 
living in marshy situations, with the bases of their leaves in contact with 
the humid soil. 
With regard to the species under examination in the present communi- 
cation, the distribution of the mucilage glands is similar to that described by 
Wilson. At the extreme base of the leaf sheath on its upper surface in 
5. binervosa , in all the forms examined, mucilage glands are very abun- 
dant, forming in parts an almost continuous layer over the sheath. As 
the distance from the leaf axil increases, the glands become fewer in 
number, and finally pass over by every stage of transition into the second 
type of gland. 
1 Chermezon, H. : Rechercbes anatomiques sur les plantes littorales. Ann. Sci. Nat., Bot., 
1910, ser. 9, t. 12, p. 117. 
2 Wilson, J. : The Mucilage- and other Glands of the Plumbagineae. Ann. Bot., vol. iv, 
1890, p. 231. 
3 Details relating to the protection of younger foliage by the leaves are given on pp. 247 and 249. 
