Cladostephus.] AhGJE MELANOSPERME^. 179 



belongs ; but that it has no relation to Padina, or even to Dictyota, 

 is obvious to any one who will take the trouble of examining it with 

 the aid of a microscope. Its resemblance to Padina is merely super- 

 ficial. 



19. Haliseris. Tozzetti. Haliseris. 



Frond flat, linear, membranaceous, with a midrib. Root a 

 mass of woolly filaments. Fruct. ; ovate seeds, forming dis- 

 tinct sori or groups (mostly arranged in longitudinal lines). 

 Grev. Name ; a\s, a\is, the sea, and cepi?, endive ; sea en- 

 dive. 



1. H. polypodioides, Ag. Polypodiwn-like Haliseris. Frond 

 dichotomous (often proliferous), obtuse, entire at the margin. 

 Hook. Br. Fi. v. ii. p. 283. — Ficcus membranaceus, Stackh. 

 Ner. t. 6. E. Bot. t. 1758. 



Rocks in the sea, covered with sand, very rare. Quilty Strand, at 

 extreme low-water mark, Miltown Malbay ; W. H. Harvey. 6—12 

 inches high, delicately membranaceous, and turning in an oblique di- 

 rection from the margin to the midrib. When fresh it has an extremely 

 powerful disagreeable smell. 



Tribe VI. ECTOCARPE^. 



Plants marine, of an olive-green or (rarely) fall-green colour, 

 filamentous, often capillary or crinoid, articidated, cartilaginous or 

 Jlaccid, not very juicy, nor adhering strongly to paper. Frond 

 muck branched, mostly of a uniform structure throughout ; articida- 

 tions of the filaments mostly very short, (but very variable in the 

 same filament, and not to be depended on informing specific charac- 

 ters). Root minute, scutate. Fructification double, mostly moncc- 

 cious (both hinds produced on the same individuals ) , 1. Capsules 

 containing dark-coloured seeds ; 2. granules imbedded in the dis- 

 tended, often vesicated apices of the ramidi. 



20. Cladostephus. Ag. Cladostephus. 



Filaments cartilaginous, inarticulate, whorled with short articu- 

 lated ramuli, olivaceous. Fruit double: 1. ovate capsules, 

 furnished with a terminal pore, containing dark seeds ; 

 2. granules imbedded in the apices of the ramidi. — Name ; 

 KXaSos, a branch, and ot€0os, a crown; from the whorled 

 ramuli. 

 1. C. verticillatas, Lyngb. Whorled- Milfoil Cladostephus. 



Ramuli regularly whorled, subdistant, mostly forked; branches 



slender. Harv. in Hook. Br. Fl. v. ii. p. 322. Conf. vertic. 



E. Bot. t 1718. and t. 2427. / 2, 



