230 



FLORA 01 NEW ZEALAND. 



[AlffCB. 



12. Polysiphonia Lyallii, Hook. fil. et Harv. Fl. Ant. v.l.p. 182. t. 74. /. 1. Lond. J. Bot. v. 4. p. 268. 

 Harv. Ner. Austr. p. 41. — P. Mallardise, Harv. Ner. Austr. (partim). 



Hab. Preservation Harbour and Poveaux Straits, Lyall. Hawke's Bay, and other stations, Colenso. 

 (Native of Antarctic shores.) 



Dr. Lyall's specimens here referred to are much larger and finer than those formerly received from Auckland 

 Islands, and differ a little in ramification. Stem 8-12 inches long, simple, furnished throughout with closely-set, 

 lateral, patent, simple branches, sometimes only a line or two asunder, sometimes half an inch or more. Branches 

 densely clothed with multifid, imbricated ramuli. Conceptacles ovate, half the size of those of P. Mallardia, sub- 

 sessile on the ramuli. Primary tubes sometimes five. 



Mr. Colenso's specimens trace the species from an early stage. When about an inch high it is unbranched, 

 densely clothed with multifid ramuli. Older specimens are more and more compound. Some of these latter we 

 formerly confounded with P. Mallardia, but they differ from that species in the ceramidia, and in some minor cha- 

 racters, and so nearly agree with Dr. Lyall's plant as to convince us that they belong to the same species. 



Subgenus 3. POLYSIPHONIA, J. Ag. 



13. Polysiphonia Brodiai ? Grev. ; caule elato corticato immerse articnlato 7-8-siphonio simplicive 5 

 furcato alterne ramoso, ramis ssepius brevibus quaquaversum egredientibus ramulis decompositis creberrime 

 multifidis subfascicnlatis obsessis, ramulis erectis pellucide articulatis 3-4-striatis, articulis diametro sesqui- 

 longioribus, ceramidiis ovato-urceolatis ad ramulos sessilibus. — P. Brodisei, Harv. PJiyc. Brit. t. 195, etc. 



Hab. On the beach, East Coast, and South Harbour, Southern Island; and Port Cooper, Banks' 

 Peninsula, Lyall. (Native of Europe.) 



Dr. Lyall's specimens are about 10 inches long, \ a line in diameter at the base, well clothed with short 

 branches an inch or two in length. They are copiously in fruit : more robust than our specimens from the West of 

 Ireland, but not offering any very decided differences. The specimen from Port Cooper is nearly denuded of ramuli, 

 but the few that remain have the proper structure, and bear tetraspores. 



14. Polysiphonia lotryocarpa, Hook. fil. et Harv., Fl. Ant. v. I. p. 181. t. 70. Harv. Ner. Austr. p. 57 ; 

 ceramidiis ovato-urceolatis ad ramulos sessilibus ssepius secundis. 



Hab. Otago and Poveaux Straits, Lyall. (Native of Auckland Islands.) 



Since this plant was described in the ' Flora Antarctica,' we have received from the Auckland Islands a speci- 

 men which, instead of the dense tufts of minute ceramidia, such as our former specimens bore, is copiously covered 

 with ceramidia of a size proportionate to the species, and sessile along the ramuli, frequently several secund on each 

 ramulus. These we must regard as the normal condition of the fruit; the tufted ceramidia formerly described and 

 figured by us being the result of disease. We regret that such a character should be perpetuated in the specific 

 name. Some of the specimens from Foveaux Straits are two feet or more in length. 



15. Polysiphonia cancellata, Harv., Lond. J. Bot. v. 3. p. 440. Ner. Austr. p. 51. t. 15. 

 Hab. Banks' Peninsula, Lyall. (Native of New Holland.) 



16. Polysiphonia aterrima, Hook. fil. et Harv., Lond. J. Bot. v. 4<.p. 536. Harv. Ner. Austr. p. 52. 

 Hab. Parasitical on Pucoids, very common. 



17. Polysiphonia decipiens, Mont., Voy. Bole Sud, Bot. v. 1. p. 131. Fl. Ant. v. 1. p. 184. Harv. 

 Ner. Austr. p. 50. P. rytiphkeoides, Hook. fil. el Harv. Lond. J. Bot. v. 4. j). 537. 



Hab. Otago and Akaroa, Lyall. New Zealand, Iiaoul. 



18. Polysiphonia ramulosa, Harv. ; nigrescens, fronde unciali setaceo-capillari articulata nabellatim 

 ramosa, ramis virgatis alterne divisis ramulisque quaquaversum egredientibus densissime obessis, ramulis 



