Plate LIV. 
Fig. 246. GRIFFITHSIA SECUNDIFLORA. 
Colour. A fine ricli crimson. 
Substance. Gelatinous, but firm. 
Character of Frond, Tufts of distinctly jointed threads {filaments). Filaments robust (de- 
cidedly thicker than a hog’s bristle 1), very nearly the same thickness throughout ; 
each stem simple at first, irregularly forked upwards ; the last divisions often close ; 
spreading wedge-wise (see magnified bit), forming a circular outline. Angles of 
branching {axils) very narrow. Branchlets very upright. Tips very blunt. 
Measurement. From 4 to 8 inches long. 
Fructification., Has not yet been seen in Britain. 
Habitat. Plymouth. On rocks at extreme low-water mark. Very rare. 
The robust Items, strongly marked joints (quite obvious to the naked eye, especially when 
dried), very narrow axils, upright branching, and remarkably blunt tips, distinguish this 
from every other Griffithsia. 
Fig. 247. GRIFFITHSIA SIMPLICIFILUM. 
Colour. A fine pinky-red. 
Substance. Soft and spongy, but firm. 
Character of Frond. Thickish, cylindrical stems and branches, once or twice re-branched in a 
loose, irregular manner ; surrounded and densely clothed by rings {whorls) of tiny, 
straight, overlapping, jointed branchletee/is (ramelli), once forked near the base (see 
magnified bit). Branches and branchlets tapering greatly to the tips ; the latter 
often bare of branchleteews below, but generally clothed with them near the top. 
Measurement. From 4 to 8 inches long. 
Fructification. Not observed ; but no doubt like that of G. equisetifolium. 
Habitat. Coasts of Norfolk and Wicklow. On rocks, &c. near low-water mark, and at a 
greater depth. Very rare. 
Now Halurus simplicijilum. Probably only a slender, drawn-out variety of G. equisetifolia. 
The points of differentiation are, that it is less re-branched ; that the brancbletee/?s are 
straighter and only once forked ; and that the whole plant is more slender, and perhaps of a 
brighter colour. But intermediate specimens are constantly found. For other Griffithsias 
see Plate LV. 
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