Plate LXIX. 



Fig. 324. CLADOPHOEA ALBIDA. 



Colour. Pale, or sometimes bright light green; whitish, and generally without gloss, 

 when dry. 



Substance. Soft, silky, and very spongy; retaining water and swelling with it; soft 

 to the touch when dry. 



Character of Frond. Fine tufts of jointed threads {filaments) excessively branched. 

 Filaments slenderer than human hair; crowded with long irregular branches, 

 spreading on all sides, and several times re-branched; the upper branches 

 straight; spreading; often opposite. These set with straight, upright, short, 

 opposite, or secund branchlets; one issuing from each joint, and occasionally 

 bearing a second set. 



Joints. Four or five times longer than broad; filled with light green colouring 

 matter {endoehroone). 



Measurement. From 2 to 6 inches long. 



Fructification. Minute seeds {zoospores) formed of the colouring matter in the 

 joints, and in due time bursting through them. 



Habitat. Southern shores of England and Ireland. On rocks and algse between 

 tide-marks, usually near low-water mark. Not uncommon. 



This Cladopliora approaches nearest to G. refrada in appearance; but it is a 

 much taller plant when well grown. Moreover, it is distinctly simngy, which 

 C. refrada is not; and it has a peculiarly soft woolly feeling when dry, which 

 distinguishes it from all the genus but G. lanosa. 



Fig. 325. CLADOPHOEA FALCATA. 



Colour. A peculiarly rich, glossy green. 



Substance. Rigid; but adhering to paper in drying. 



Character of Frond. Dense tufts of jointed threads {filaments')^ very much branched. 

 Filaments thicker than human hair; nearly uniform throughout; entangled at 

 the base; irregularly divided; much curved. Branches zigzag; curved and 

 twisted all ways; repeatedly forked. The last divisions crowded; three or 

 four springing together from a stem. These all strongly arched in one 

 direction, like a set of curled feathers; their inner faces clothed with branchlets; 

 some short and blunt; some longer and re-branchleted. 



Joints. Three or four times longer than broad; filled with dense green colouring 

 matter {endochrome). 



Measurement. Three or 4 inches long. 



Fructification. As before. 



Hahitat. Dingle Harbour, Kerry. Jersey. On the bottoms of clear rock-pools near 

 low-water mark. Not common. 



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