170 THE MARINE BOTANIST. 



sessile or stalked, marginal or axillary, containing 

 spores. 2. Lateral or axillary, simple or branched 

 pods (stichidia), containing transversely parted 

 tetraspores. 



PLOCAMIUM COCCINEUM.— SCARLET 

 PLOCAMIUM. 



A beautiful and very common sea-plant, with 

 much branched and feathery fronds, the lesser 

 ramuli furnished on their inner side with comb-like 

 divisions. Tubercles sessile on the edge of the 

 upper branches, each one about the size and colour 

 of a poppy-seed ; tetraspores contained in small 

 cross-like receptacles borne on the ramuli. Colour 

 a fine pinky red. Substance not at all flaccid, and 

 though so delicate in its branchings, it is a very 

 easy species to spread out, only requiring to be laid 

 in a plate with sufficient water to float the branches, 

 which, with the help of a camel-hair pencil, will 

 soon fall in their natural and therefore most elegant 

 position. Frequent on rocks and algse. Perennial. 

 Summer and autumn. 



