656 jx. algal [ Macrocystis . 
Var. Dubenii, Harv. Phyc. Austr. iv. t. 202. Bladders subcylindric, 6-8 in. long. — M. 
Dubenii , Areschoug. 
Abundant on all the rocky coasts. (Throughout the Southern Ocean and along the west 
coasts of N. and S. America, also found in floating masses to lat. 65° S.) 
18. LESSONIA, Bory. 
Boot scutate or branched. Brand with a more or less distinct stem, or 
sometimes a tree-like trunk, dichotomously branched and bearing leaves, but no 
bladders. Leaves geminate, formed from the fission of one, between coriaceous 
and membranous, ovate ensiform or lanceolate, ribless, entire or somewhat 
toothed. Sori superficial in the middle of the leaf, of narrow ellipsoid spores 
mixed with clavate inarticulate filaments. 
A genus of often huge erect subdendroid Alga, abounding in the Southern Ocean. 
1. L. fuscescens, Bory in Voy. Coquil. t. 2./. 2. et t. 3 ; — FI. N. Z. 
ii. 217. Gregarious, forming submarine miniature forests; trunks some- 
times 10 ft. long, cylindric, as thick as the thigh, bearing towards the top 
short branches with pendulous foliage. Leaves 2-8 ft. long, 1-2 in. broad, 
linear-lanceolate, toothed, older sinuate. — J. Ag. Sp. Alg. i. 151 ; El. Antarct. 
t. 167-8 A and 171 D. 
East coast, Colenso ; Cook’s Straits, Lyall . — Probably common in all rocky bays. (Chili, 
Fuegia, Falkland Islands, Kerguelen’s Land.) 
19. ECKLONTA, Hornemann. 
Boot scutate or dividing into short fibres. Brand olive-green, pinnatifid, 
ecostate ; segments produced from the magnified teeth of a simple lamina, 
which is contracted to a solid or inflated stem at the base. Sori superficial 
on the lower part of the pinnae, of narrow ellipsoid spores, mixed with cla- 
vate inarticulate filaments. 
Often gigantic weeds, natives of the Southern Ocean, of which one species inhabits also 
the Canary Islands, and the other, with a long trumpet-like stem, inhabits the Cape of Good 
Hope. 
1. E. radiata, J. Agardh ; — FI. N. Z. ii. 217. Brand 1-2 ft. long; 
stem solid or sparingly inflated. 
Var. a. Frond palmately pinnatilobate, smooth ; lobes subcuneate, spinulose, toothed. — 
J. Ag. Sp. Alg. i. 146. Fucus, Turn. Hist. t. 134. Capea radiata, Endl. 
Var. 0. exasperata. E. exasperata, J. Ag. ]. c. 146 ; FI. N. Z. — Surface of the frond 
spinulose. — Capea biruncinata, Montague in Phytogr. Canariens. Crypt, t. 7 ; FI. Antarct. 
160 ; Laminaria, Bory in Voy. Coquil. t. 10. 
Var. y. Richardiana. E. Richardiana, J. Agardh, 1. c. 147; FI. N. Z. 1. c. — Frond 
elongate, pinnately decompound, smooth ; lobes miuutely toothed. — Capea , Kuetzing. 
Var. 5. flabelliformis. E. flabellformis, J. Ag. 1. c. 147 ; FI. N. Z. 1. c. — Stem some- 
what inflated, 2 feet long; frond pinnately decompound, surface rugose, plaited. — Capea, 
nob. in Lond. Journ. Bot. 4, 528 ; Laminaria, A. Richard, FI. Nov. Zel. t. 1, 2. 
Common along the shores of the Northern and Middle Islands, Banks and Solander, 
etc. (Australia, Tasmania, Chili, Canary Islands.) 
