Fig. 47. CHORD ARIA FLAGELLIFORMIS. 
Colour. Dark olivaceous green ; inclining to brown. 
Substance. Firm and sinewy. 
Character of Frond. Thread-like {filiform) ; branched ; of equal thickness throughout. 
Stem branched on each side. Branches long, alternate, mostly simple ; occasionally 
a few branchlets upon them. Fringed all over with fine, colourless hairs, which can 
only be seen when it is under water, but give it a slimy feel when out. 
Measurement. From 3 inches to 3 feet long ; from 1 to 2 hog’s bristles thick. 
Fructification. Minute, seeds {spores) concealed in the substance of the frond. 
Habitat. Our coasts generally. On rocks and stones between tide-marks. Common. 
The hairs give this plant a feathery appearance in the water. 
Fig. 48. CHORDARIA DIVARICATA. 
Colour. Olive ; much paler than C . fiagelliformis ; brown in old age, and when dried. 
Substance. Firm and elastic ; surface slimy. 
Character of Frond. Thread-like {filiform)^ branched ; forming globose tufts. Branching 
partially forked {sub-dichotomous). Branches wavy, furnished in the upper part 
with scattered, short, mostly forked, branchlets. 
Measurement. From 1 to 3 feet long. A hog’s bristle thick. 
Fructification, Minute seeds {spores) concealed in the substance of the frond. 
Habitat. Belfast and Carrickfergus. Thrown up from deep water. Bare. 
Outwardly resembling Stilojphora rhizodes. 
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