Fig. 19. DESMARESTIA VIRIDIS. 



Colour. When growing, a fine chestnut-olive; on exposure to air, turning 

 verdigris -green; when dry, resuming its proper hue. 



Stihstance. Tender and soon decomposing when gathered. Clinging in a 

 sticky lump when exposed to the air. Recovering itself when dry. 



Character of Frond. Thread-like, long, excessively branched. Branching 

 uniformly opposite, on each side the stem, like a feather fjoinnate J. 

 Branches repeatedly branched; always in the same manner; becoming 

 finer in every series, till they resemble hairs. 



Measurement. From 1 to 3 feet long. 



Fructijication. Not ascertained. 



Habitat. Our shores generally. Between tide-marks; not uncommon. 



Easy of detection from its exactly opposite brandling throughout the whole 

 frond. Though thread-like (filiform) in growth, it flattens when dried and 

 pressed. 



Fig. 20. ARTHROCLADIA VILLOSA. 



Colour. Pale olive-green. 



Stihstance. When fresh, stiff*; soon becoming limp (^flaccid J on exposure to 

 the air. 



Character of Frond. Thread-like, long, very slender stems; several from one 

 base; branched. Branches distant, horizontal; on each side the stem; 

 commonly opposite. Branchlets the same. Frond encircled (iuhorled) 

 at short intervals with minute knobs f nodes) bearing very delicate, 

 pale-green, jointed, threads f filaments ). 



Measurement. From six inches to nearly 3 feet long. 



Fructtjication. Minute seeds {sj)ores) in tiny pod-like receptacles, borne upon 

 the hair-like filaments which surround the stems. 



Ilahitai. South of England^ Frith of Forth, Wicklow and Downshire coasts. 

 Rather rare. 



The distance of the branches from each other in this species characterises it 

 even to those who do not look close enough to observe the whorls round the 

 stems. 



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