232 



FLORA OP NEW ZEALAND. 



\Alg<B. 



patent ramuli. Colour when growing a deep red : blackish when dried. — Very similar to the Mediterranean speci- 



24. Polysiphonia ceratoclada, Mont., Toy. Pole Sud, Bot. v. 1. p. 130. t. 5./. 2. Fl. Ant. v. I. p. 183. 

 t. 76./". 2. Harv. Ner. Austr. p. 48. 



Hab. Banks' Peninsula and Lyall's Bay, Cook's Straits, Lyall. Parasitic on Carpophyllum, East 

 Coast, Colenso. (Native of Auckland Islands.) 



25. Polysiphonia Sulivanm, Hook. fil. et Harv. ; caule (e filo repente orto) erecto flabellatim ramosis- 

 simo, ramis alterne decompositis et ramulis duplicis generis e quoque fere geniculo ortis onusto, aliis lineari- 

 subulatis acutis patentibus simplicissimis invicem saapissime ternis, aliis alterne pinnatis demum in ramos 

 proflcientibus, articulis ramorum diametro duplo triplove, ramulorum sesquilongioribus multistriatis. — Fl. 

 Ant. v. 2. p. 479. t. 182./. 4. Hem. Ner. Austr. p. 48. 



Hab. South Harbour, Southern Island, Lyall. (Native of Palklands.) 



More robust and of larger size than our Falkland Island specimens, but the same in essential character. It is 

 a slenderer plant than P. ceratoclada, with longer joints and more distant ramuli. The order of ramification is very 

 regular : viz., ramuli issue alternately from every node ; first, three subulate ramuli from successive nodes ; then a 

 pinnated one ; again three subulate, and so on. The subulate ramuli never alter, but the pinnated grow out into 

 branches. If one of the pinnate ones be attentively examined, after every third pinnule may be seen a node, either 

 naked or hairy, a minute ramulus different from the pinnules ; this ramulus is the bud of a future branch. The 

 branching in P. ceratoclada is similar, but less easily seen, owing to the more densely-set ramuli. 



26. Polysiphonia dendritic a, Ag. Harv. Ner. Austr. p. 47. 



Hab. Parasitical on Pterocladia lucida and other Alga, common. (Native of New Holland and 

 South America. ?) 



27. Polysiphonia cladostepJms, Mont. Pole Sud, Bot. v. 1. p. 132. t. 13. /. 4 a. Harv. Ner. Austr. 

 p. 45. P. byssoclados, Hook. fil. et Harv. in Bond. J. Bot. v. 3. p. 436. 



Hab. Parasitical on Sargassa, etc., Akaroa, Lyall, Raoul. (Native of New Holland and Tasmania.) 



Gen. XLI. DASYA, Ag. 



(Ag. Sp. Alg. ii. 116. Harv. Ner. Austr. p. 57. Basya, LopJiothalia, Eupogonium, Trickotkamrdon, Eupogodon, Kiitz. 



Sp. Alg. pp. 795-803.) 



1. Dasya collabens, Hook. fil. et Harv.; caule elato (8-12-unciali) tereti inarticulato flaccido glabro 

 indiviso decomposite pinnato, pinnis (v. ramis primariis) bi-tripinnatis circumscriptione ovato-lanceolatis, 

 pinnulis distichis iternm subdivisis et ramellis articulatis monosiphoniis dichotomis laxe vestitis, ramellis 

 patentibus basi crassiusculis sensim attenuatis acutissimis bis-terve farcatis, articulis diametro 2-3-plo 

 longioribus ad genicula contractis, stichidiis . . . ? — Harv. Ner. Austr. p. 61. t. 21 {status junior). 



Hab. Akaroa, Raoul, Lyall. Bluff Harbour, Poveaux Straits, Chalky Bay, Middle Island, and Port 

 Adventure, Southern Island, Lyall. 



The figure in ' Nereis Australis,' taken from a young plant, gives a very erroneous impression of this beautiful 

 species, which grows 8-12 inches long, and becomes three or four times pinnated, with the habit of JD. coccinea. It 

 is extremely soft and flaccid, and adheres very closely to paper. Colour a beautiful rosy-red or crimson. — Dr. Lyall's 

 specimens are not in fruit. 



2. Dasya squarrosa, Harv. ; caule setaceo pellucide articulato vel basi subcorticato in parte inferiore 

 ssepius ramellis pusiliis exasperato apice glabro crebre pinnato v. bi-tri-pinnato, ramis distichis subtrisiphoniis, 



