Plate LXXII. 



Fig. 336. CONFERVA SUTOEIA. 



Colour. Dark green. 

 Substance. Soft. 



Character of Frond. Thread-like {filamentous); jointed; forming floating and loosely 

 entangled fleeces in ditches and pools. Filaments almost the thickness of a 

 hog's bristle, equal throughout; very long, wavy, unbranched. 



Joints. Once and a half as long as broad; filled with green colouring matter (endo- 

 chrome). 



Measurement. Indefinite. 



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



joints, and in due time bursting through them. 

 Hahitat. Wisbeach, &c. In ditches and pools subject to the influence of the tides; 



sometimes found growing with C. Linum. 



Like C. Linum but a much slenderer plant, with longer proportioned joints. 



Fig. 337. CONFERVA YOUNGANA. 



Colour. G-rass-green ; not glossy when dry; fading to a dull brownish orange in the 

 herbarium. 



Substance. Soft, but firm. Rather woolly to the touch when dry. 



Character of Frond. Short (or sometimes long), dense tufts of jointed threads {fil- 

 aments)^ spreading over the surface of rocks and wood-work. Filaments as 

 fine as human hair; straight, or nearly so; clinging together; unbranched. 



Joints. Very variable in length. Generally once and a half as long as broad, but 

 sometimes twice as long, and sometimes only half; at first, quite filled with 

 dense, bright green endochrome, which afterwards contracts into a dark spot 

 in the centre. 



Measurement. One or 2 inches high. 



Fructification. Minute seeds (zoospores) formed of the colouring matter in the joints, 

 collected into a round central mass {sporidiiun), which in due time bursts 

 out. 



Habitat. Our coasts generally. Near Dunraven Castle. Filey, &c. Not uncommon. 



Now Hormotrichum Younganum. See under Figure 328. 



Fig. 338. OCHLOCHiETE HYSTRIX. 



Colour. Pale green. 



Substance. Harsh, for so infinitesim ally -^iz^di a plant! 



Character of Frond. A minute hairy patch formed of jointed threads {filaments), 

 radiating from a centre, and so forming a round dot. The filaments some- 

 what branched, and usuall}^ sending up long, stiff", transparent, unjointed 

 bristles from almost every joint. 



Measurement. A homoeopathic globule! 



Fructification. Unknown. 



Habitat. In brackish water near the coast; and sometimes in inland ditches, on 

 stems of grasses, leaves of mosses, &c. Very rare. 



The plate is incorrect in representing the bristles as fjreen, they are'colour- 

 less and transparent. 



69 



