108 THE MARINE BOTANIST. 



frond cubical. Fructification. 1. Ceramidia; 2. 

 TetrasporeSy contained in terminal^ lanceolate pods. 



BOSTRYCHIA SCORPIOIDES.— TANGLED 

 BOSTRYCHIA. 

 Fronds entangled, very much branched, spreading* 

 very slender, fornished with small tufts of forked 

 patent ramuli ^ the uppermost ones curled inwards. 

 Colour, pale purplish, becoming* blackish in drying. 

 Substance somewhat cartilaginous, tender. This 

 genus is anomalous among the Rhodomela tribe, 

 the species growing indifferently in situations where 

 fresh water flows into the sea, or in ditches of 

 brackish water at some distance from the coast. 

 Our native species varies in hue according to the 

 locality ; it is sometimes of a brownish or greenish 

 colour. Grows on muddy sea-shores near high 

 water-mark, at the estuaries of rivers, in salt water 

 ditches and marshes, adhering to the roots of 

 flowering plants; also on sub-marine rocks within 

 tide-marks. Annual. Selsey Marshes. North Wales. 

 Shoreham on Atriplex portulacoides. Mouth of 



