668 
IX. ALGjE. 
[ Polysiphonia . 
Parasitical on Fucoidece, Colenso . — Habit and ramification of F. ceratoclada. 
2. P. dendritica, Hook.f. and Harv. FI. N. Z. ii. 232. Frond 1J-2 in. 
]ong, ovate. Stem prostrate, attached by its whole length, compressed, un- 
divided, 3-pinnately branched ; branches alternately simple and 2-pinnate, 
long, spreading; pinnules likewise alternately simple and 2-pinnate; articu- 
lations very short, of many tubes, hence striated. Conceptacles terminal, 
globose-urceolate, oblique, with a prominent mouth. — J. Ag. Sp. Alg. 916 ; 
Harv. Ner. Austr. 47. Hutchinsia, Ag. 
Parasitic on various Fuel, abundant. (Australia, S. America.) 
3. P. ceratoclada, Mont.; — FI. N. Z. ii. 232. Frond 1-4 in. high, 
rigid, red-brown, erect from creeping filaments, compressed, undivided below, 
then giving off alternate lateral branches. Stem and branches furnished 
throughout with frequent subulate patent or recurved acute branchlets ; arti- 
culations with 12-16 tubes. Conceptacles solitary, large, sessile or shortly 
stalked. — Mont. Voy. auPole Sud, i. 130. t. 5. f. 2 ; FI. Antarct. t. 76. f. 2 ; 
Harv. Ner. Austr. 48 ; J. Ag. Sp. Alg. 923. 
Parasitical on other Alga , from the east coast, Colenso , to Lord Auckland’s group, 
IS Urville, etc. 
4. P. Sulivanse, HooJc.f. and Harv. FI. N. Z. ii. 232. Frond slender, 
1-2 in. high, red-brown, much flabellately branched, flaccid. Stem a creep- 
ing thread ; branches fastigiate, alternately decompound, with 3 subulate 
simple branchlets from as many successive nodes, and then a pinnated 
branchlet from the following node and so on ; branchlets patent, curved, 
alternate or secund, terminal almost circinate; articulations with 12 tubes, of 
the branches twice as long as broad, of the branchlets shorter. — FI. Antarct. 
ii. t. 182. f. 4; Harv. Ner. Austr. 48; J. Ag. Sp. Alg. 923. 
Stewart’s Island, Lijall. (Falkland Islands.) 
5. P. pennata, Ayardli ; — FI. N. Z. ii. 231. Frond 1-2 in. high, 
dark red, blackish when dry. Stem branched above the middle, setaceous, 
compressed ; branches erecto-patent, simple or alternately decompound, all 
pinnated with distichous subulate erecto-patent branchlets ; articulations as 
broad as long, with 8-10 tubes. — J. Ag. Sp. Alg. 928. 
Auckland, Lgall ; Cape Kidnapper, Colenso. (Australia, Atlantic and Mediterranean 
Seas.) 
6. P. neglecta, Harv. in Trans. Irish Academy, xxii. 541. Fronds 
forming dense tufts 1 in. diameter. Stems decumbent, rooting below ; tips 
ascending, sparingly branched ; branches ascending, then erect, sparingly di- 
vided, attenuated at the apex ; articulations twice as long as broad, upper as 
long as broad. Tubes about 8-9. — J. Ag. Sp. Alg. 942. 
New Zealand, Sinclair. (Australia.) 
7. P. implexa, Hook. f. and Harv. FI. N. Z. ii. 229. Frond small, 
tufted, 1 in. high, purple. Stems creeping, intricate; branches alternate, 
spreading, divided at the apex ; branchlets subulate, spreading, subsimple ; 
lower articulations once and a half as long as broad, upper as long as broad. 
Tubes 4. — J. Ag. Sp. Alg. 946. 
