Algce?\ 



FLORA OP NEW ZEALAND. 



231 



brevibus spinaeformibus patentibus nunc simplicibus subulatis nunc ramulos minores subulatos ferentibus, 

 articulis ramorum ramulorumque diametro duplo brevioribus, siphonibus septem. 

 Hab. Parasitical on Sargassa, Parimahu, Colenso. 



About 1 inch high, as thick as horsehair, divided above the base into numerous principal branches, which are 

 alternately subdivided. These are beset with very numerous, patent, spine-like ramuli, one or two lines long, 

 spreading to all sides, and either quite simple, or bearing other similar and smaller ones. Apices acute. Articula- 

 tions about half as long as broad, or a little longer. 



Smaller than P. cancellata or P. decipiens, and apparently different, though nearly allied. 



19. Polysiphonia isogona, Harv.; dense csespitosa, badia, siccitate fragilis, frondibus setaceo-capillaribus 

 e basi decomposite ramosissimis, ramis pluries alterne vel subdichotome divisis, ramis minoribus basi longe 

 nudis apice multifidis, ramulis erectis, axillis omnibus angustis, apicibus parce fibrillosis, articulis omnibus 

 diametro subsesqui- vel duplo longioribus, geniculis pellucidis, siphonibus novem. 



Hab. Blind Bay, Cook's Straits, Lyall. Cape Kidnapper and Hawke's Bay, Colenso. 



Densely tufted. The habit is very similar to that of P. anisogona, but the filaments are more slender, with 

 fewer tubes, and uniformly short articulations. It adheres to paper in drying, and is rather fragile when re-moistened. 

 Mr. Colenso's specimens are smaller and very badly preserved, but have the microscopic characters of the species. 



20. Polysiphonia comoid.es, Harv. ; dense csespitosa, badia, frondibus capillaribus e basi decomposite 

 ramosissimis, ramis pluries alterne vel subdichotome divisis, minoribus basi nudis apicem versus alterne com- 

 positis, ramulis basi angustatis erectis, articulis mediis diametro 4-5-plo, superioribus 2-3-plo, ramulorum 

 subsesquilongioribus, geniculis pellucidis, siphonibus novem decemve. 



Hab. Akaroa and Port Cooper, Banks' Peninsula, Lyall. 



Very similar in external habit to P. isogona, from which it is chiefly to be known by the longer articulations, 

 should that character prove a constant one. 



21. Polysiphonia corymbifera, Ag. ; fusco-rubescens, dense csespitosa, fronde capillari-setacea articula- 

 ta multistriata dichotoma vel vage ramosa, axillis primariis distantibus ramisque nudiusculis, ramis minori- 

 bus lateralibus corymboso-fastigiatis pluries dichotomis, articulis ramorum diametro triplo quadruplove lon- 

 gioribus, ramulorum sesquilongioribus, ultimis diametrum vix eequantibus, siphonibus undecim v. duodecim. 

 — Ag. Sp. Alg. v. 2. p. 90. Harv. Ner. Austr. p. 54. 



Hab. Maketu, Chapman. (Native of Cape of Good Hope.) 



Rather more slender than the Cape of Good Hope specimens, and usually with only eleven radiant cells in the 

 axis. Habit very similar. 



22. Polysiphonia nigrescens, Grev. Harv. Ner. Austr. p. 54. PAyc. Brit. t. 277. E. Bot. t. 1717, 

 1743. 



Hab. New Zealand, Baoul. (Native of Northern Atlantic and Pacific.) 



23. Polysiphonia pennata, Ag. ; siccitate nigrescens, caule setaceo compresso simpliciusculo apice 

 alterne ramoso cum ramis distiche pinnato, pinnis simplicissimis lineari-subulatis acutis erecto-patentibus 

 pluristriatis, articulis omnibus diametrum subeequantibus, siphonibus 8-10. — Ag. Sp. Alg. v. 2. p. 102. 

 /. Ag. Alg. Medit.p. 141. 



Hab. Auckland, Lyall. Cape Kidnapper, Colenso. (Native of South of Europe.) 



Frond 1-2 inches high, sparingly branched beyond the middle ; the branches ereeto-patent, simple, or alter- 

 nately decompound in the upper part. All the branches at the stem pinnated with distichous, subulate, erecto- 



