Porphyra 
ix. alga?. 
715 
1. P. laciniata, Agardh; — FI. N. Z. ii. 264. Fronds clustered, 4-18 
in. long, fixed by the base or centre, glossy, fine purple, deeply and irregu- 
larly cleft ; margin cut and lobed. — Harv. Phyc. Brit. t. 92. 
Common on rocks and stones in the sea (all latitudes).— This is much used as “ Laver,” 
in England, in scrophulous cases. 
2. P. vulgaris, Agardh ; — FI. N. Z. ii. 264. Frond 1-2 ft. long, 
simple, lanceolate, often much waved, undivided. — Harv. Phyc. Brit. t. 211. 
With the last and probably not different from it. 
3. P. capensis, Kuetzing ; — FI. Antarct. 193. Frond tufted, small, 
violet-purple, orbicular, crisped and undulate, 1-2 in. broad. — P. Columhina , 
Mont, in Yoy. au Pole Sud, 33. 
Lord Auckland’s group and Campbell’s Island, If Urville, J. D. H. (S. Africa, etc.) 
102. ULVA, Linn. 
Frond bright green, flat, membranous, leaf-like, without midrib, sometimes 
inflated or saccate when young. Fructification of green spores, arranged in 
fours, dispersed over the whole frond. 
Perhaps the commonest marine plants in the world, annual ; the species are probably all 
forms of one. 
1. U. latissima, Linn.; — FI. N. Z. ii. 265. Frond tufted, 6-18 in. 
long, delicately membranous, pale green, broadly obovate or oblong, flat, or 
variously lobed or waved. — Harv. Phyc. Brit. 171. 
Abundant on the shore everywhere, as far south as Campbell’s Island. (All seas.) 
2. U. rigida, Agardli ; — FI. N. Z. ii. 265. Frond subcartilaginous, 
contracted to a flat thickish stipes, deeply lobed ; lobes curved, undulate ; cells 
subquadrate, orbicular. — Phycoseris rigida and lobata , Kuetzing. 
East coast, Colenso. (Atlantic, Chili, etc.) 
3. U. crispa. Light/.; — FI. N. Z. ii. 265. Fronds forming an irre- 
gular stratum, short, crisped and plaited. — FI. Antarct. 498. Prasiola crispa 
and antarctica, Kuetzing. 
Probably common on damp ground near the sea. (Europe, etc.) 
4. U. bullosa ?, Roth; — FI. _ZY. Z. ii. 265. Fronds forming green 
strata, small, obovate and saccate when young, at length breaking up into 
ragged bullate laminae. — -Kuetzing, Tab. Phyc. t. 28. f. 1. 
On stones, under water, Colenso. — Specimens young, and perhaps not referable to this 
species. (Europe, etc.) 
TJ. reticulata , Eorst., a tropical species, found in the Red Sea, Sumatra, etc., is men- 
tioned by Montague (Voy. au P61e Sud; Bot. Crypt. 33) as a native of Lord Auckland’s 
group, but I suspect some mistake ; it may be recognized by its flat perforated frond divided 
into linear-reticulated lobes. 
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