Fig. 175. NITOPHYLLUM HILLI^. 



Colour. A fine rose-red, wHcli turns to orange in fresh water. 



Substance. Membranaceous and tender, but thickish. Mrs. Griffiths said, 

 '''' resembling soft kid-leatber.^^ 



Character of Frond. A flat, ribless expansion; rising from a short stalk; of 

 round but irregular outline; more or less deeply slit into oblong, 

 broad, rounded divisions {Jacinice). Margins smooth and even; or 

 occasionally slightly waved. Obscure veins rising from the base, and 

 sometimes spreading faintly upwards. 



Measurement. From 4 to 8 inches long. 



Fructification. Of two kinds. 1. Clustered spores in large globose capsules ; 

 immersed in, and scattered over, the surface. 2. Tetraspores in 

 extremely minute, dot-like groups {sori), scattered over the upper part 

 of the divisions {lacinice). 



Habitat. South of England. On the shady sides of deep tidal-pools near 

 low- water mark. Rare. 



Fig. 176. NITOPHYLLUM GMELINI. 



Colour. Purplish-red. 



Substance. Membranaceous; but crisp and somewhat rigid when first gathered. 



Character of Frond. A flat, ribless expansion, rising from a short stalk; of 

 broadly fan-shaped or round outline; more or less deeply slit and 

 divided. Divisions (lacinice) broadly wedge-shaped, waved or curled. 

 Margins smooth and even. Obscure veins rising from the base and 

 sometimes spreading faintly upwards. 



Measurement. From 2 to 4 inches high, and as wide or wider. In Irish 

 specimens 6 inches. 



Fructification. Of two kinds. 1. Clustered spores in largish, globose 

 capsules; scattered over the surface. 2. Tetraspores in long, line -like 

 groups {sori) along the margins only. 



Habitat. South of England. Plymouth, fine. Ireland. On rocks and large 

 algae, near low- water mark. 



When fresh, ahvays to be recognised by its crisp, rigid substance. 



2 



DSI 



