652 
ix. alga;. 
8. LANDSBURGIA, Harvey. 
Root scutate. Frond olive-brown, with a distinct stem and leaves, but no 
bladders; stem filiform, alternately branched. Leaves linear, flat, with a 
stout midrib, pinnatifid to the middle. Receptacles formed of small oblong 
toothed leaves near the tips of the branches, containing densely crowded 
conceptacles on their thickened surfaces ; conceptacles with stalked spores 
and antheridia, mixed with simple filaments. 
The following is the only species. 
1. L. quercifolia, FI. N. Z. ii. 213. t. 107. Root solid, 1-2 in. 
diameter. Stem 3-4 ft. long, £ in. diameter at the base ; branches filiform, 
naked and tubercled below. Leaves distichous, alternate, 2-4 in. long, pe- 
tioled, in. broad, pinnatifid to the middle ; lobes sometimes toothed, 
between membranous and coriaceous, midrib produced beyond the middle. 
Fruiting leaves f in. long, serrate. — Phyllospora quercifolia, nob. in Lond. 
Journ. Bot. 4. 525 ( not Fticus quercifolius. Turner.) 
Bay of Islands and probably elsewhere, abundant, If TJrville, etc. 
9. FUCODIUM, J. Agardh. 
Frond olive-brown or green, often black when dry, dichotomously or sub- 
pinnately branched, cylindric compressed or flat, ribless, leafless, with distinct 
receptacles. Bladders 0 in the N. Z. species (in the middle of the frond in 
others). Receptacles terminal or lateral. Conceptacles containing ellipsoid 
spores surrounded by simple-jointed filaments or fascicled or racemose an- 
theridia, or both. 
A small genus, native of both temperate zones. The N. Z. species belong to a peculiar 
southern section without bladders. 
1. F. gladiatus, J. Agardli , Sp. Alg. i. 202. Frond 3-4 in. long, as 
thick as a swan’s quill, terete below, compressed above, dichotomously de- 
compound ; segments spreading, truncate or 2-lobed. Receptacles 6 in. long 
and more, in. broad, dichotomously branched ; ultimate segments 4 in. 
long, ensiform. — Fueus, Labill. FI. N. Holl. t. 256; Turn. Hist. t. 240. 
Hermanthalia, Kuetzing. Xxphopliora Billardieri, Mont, in Voy. au Pole 
Sud, t. 7. f. 1 ; FI. N. Z. ii. 215 ; FI. Antarct. t. 69. f. 3. 
Abundant on rocky shores as far south as Xiord Auckland’s group. (Tasmania, Aus- 
tralia.) 
2. F. chondrophyllus, J. Agardh, Sp. Alg. i. 203. — Xiphopjhora, 
Mont.; FI. N. Z. ii. 215. Frond 12 in. long; segments linear, erecto- 
patent, lower % in. broad, upper in. Receptacles terminal, their ulti- 
mate segments very short, in. long. — Fucus, Brown in Turn. Hist. t. 222. 
New Zealand, I)' TJrville ; Bauks’s Peninsula, Lyall ; Otago, Lindsay. (Australia, Tas- 
mania.) 
10. HORMOSIRA, Endlicher. 
Root discoid. Frond olive-brown, without distinct organs, dichotomously 
