Polysiphonia.\ 
IX. ALG.E. 
671 
small cells ; tubes 4. — FI. Antarct. t. 74. f. 1 ; Harv. Ner. Austr. 42. P. M al- 
tar dice., Harvey iu part (N. Z. specimens only). 
Hawke’s Bay and elsewhere, on the East coast, Colenso; Otago and Stewart’s Island, 
Lyall, Lindsay. Lord Auckland’s group, J. B. II. 
20. P. corymbifera^ Agardh ; — FI. N.Z. ii. 231. Fronds loosely or 
densely tufted, red-brown, 6-8 in. long, setaceous, attenuated, manv-times 
dichotomous, striate ; upper brandies alternately divided, bearing at intervals 
short lateral alternate branchlets, | in. long, which are obovate or corym- 
bose in outline ; branchlets dichotomous ; articulations hyaline, of the main 
stem 2-3 times as long as broad, of the branches shorter, of the ultimate 
shorter than broad; tubes 10-14. Tetraspores iu distorted branchlets. — 
Harv. Ner. Austr. 54 ; J. Ag. Sp. Alg. 1039. 
Maketu, Chapman. (South Africa.) 
21. P. comoides, Harv. in FI. N. Z. ii. 231. Fronds densely tufted, 
red-brown, capillary, decompoundly branched from the very base ; branches 
many-times alternately and dichotomously divided, the smaller naked at the 
base, alternately compound at the apex ; middle articulations 4-5 times as 
long as broad ; upper 2-3 times ; uppermost 1^ times ; nodes pellucid ; tubes 
9 or 10. 
Banks’s Peninsula, Lyall. 
22. P. isogcraa, Harv. in FI. N. Z. ii. 231. Very similar to P. co- 
moides, and perhaps only a variety of it, but the filaments are more slender ; 
articulations much shorter (1-| times longer than broad). 
Cape Kidnapper and Hawke’s Bay, Colenso ; Blind Bay, Lyall. 
23. P. australis, J. Agardh. — P. cladostephus, Mont. — -FI. N. Z. ii. 
232. Frond 6-18 in. long, brown-purple, setaceous, articulate throughout, 
alternately excessively branched from the base ; larger branches decompound; 
Smaller erect, elongate, simple, all clothed with whorled, imbricate, dichoto- 
mous, rose-red, 1-tubed branchlets, springing from every node ; tips swollen ; 
articulations of the branches 2-3 times as long as broad, with 7 tubes ; upper 
shorter. Conceptacles ovate, sessile on branches at the base of the branchlets. 
Tetraspores on smaller branchlets.— J. Ag. Sp. Alg. 1044. P. cladostephus , 
Mont, in Voy. au Pole Sud, t. 13. f. 4 a; FI. Antarct. 184; Harv. Ner. 
Aust. 45 ; Phyc. Austr. t. 154. P. byssoclados, Harv. in Hook. Lond. Journ. 
Bot. iii. 436. Biudera cladostephus, llecaisne. Griffitksia australis, Agardh. 
Probably common, parasitical ou Fuel, though found hitherto only south of Canterbury ; 
Banks’s Peninsula, Lyall, liaoul. Lord Auckland’s group, ILombron, etc. (Australia, 
Tasmania.) 
24. P. decipiens, Mont. ; — FI. N. Z. ii. 230. Frond stout, shrubby, 
twiggy, coarse, bark brown, eventually black, bushy, grooved, pellucidly arti- 
culate, branched from the very base ; branches erect, decompound ; lateral 
branches 4-farious, erecto-patent, attenuated upwards ; ultimate spinescent, 
scattered ; articulations so short that the branches appear transversely striated ; 
tubes 7. — Mont, in Yoy. au Pole Sud, 131; FI. Antarct. 181; Harv. Ner. 
