Ecklonia. ] 
IX. ALG.E. 
657 
20. ZONABIA, Agardli. 
Root woolly. Frond dull yellow or olive-green, flat, ribless, coriaceo- 
membranous, flabelliform, entire or vertically multifid, concentrically striate, 
surface cells in radiating lines. Spores pyriform, superficial, scattered or 
collected into sori, mixed with simple-jointed filaments. 
A genus of both tropical and temperate zones. 
1. Z. Sinclairii, Hook. f. and Harv. FI. N. Z. ii. 218. Fronds 
tufted, erect, 2-4 in. high, much branched; stem and branches filiform, 
clothed with rusty tomentum, ending in flat cuneate laminae 1-1|- in. long, 
with pale edges, obsolete zones, and fine radiating lines ; sides of the laminae 
entire or cut. — J. Ag. Sp. Alg. i. Ill ; Harv. Phyc. Austr. i. t. 49. Stypo- 
podium, Kuetzing. 
New Zealand, Sinclair. (N. S. Wales.) 
2. Z. interrupta, Agardli ; — FI. N. Z. ii. 218. Frond tufted, erect, 
4-6 in. high, fastigiately branched, flabellate; stem terete or winged, woolly; 
segments long, narrow, obtuse, irregularly toothed or pinnatifid ; tips cu- 
neate, radiatingly striate. — J. Ag. Sp. Alg. i. Ill ; Harv. Phyc. Austr. iv. 
190. Z. Jlava, nob. in Lond. Journ. Bot. 4. 529 (excl. syn.). Fucus, Turn. 
Hist. t. 245. Phycopteris, Kuetzing. 
Common on the shores of the Northern and Middle Islands, Colenso, etc. (Austra- 
lia, Tasmania, S. Africa, Madagascar.) 
3. Z. velutina, Harv. in FI. N. Z. ii. 218. Fronds densely tufted, 
1-2 in. high, sparingly branched ; stem densely woolly, widening into a 
broad flabellate entire or divided lamina, upper surface quite smooth, under 
covered except round the margin by a dense velvety black-brown mat of 
fibres. Fructification unknown. 
East coast, Colenso ; Milford Haven and Port Cooper, Lyall. 
21. DICTYOTA, Lamouroux. 
Boot covered with woolly fibres. Frond linear, pale olive-green or brown, 
flat, ribless, membranous, cellular, dichotomous or pinnatifid, surface cells 
parallel. Spores superficial, collected in minute sori, or scattered singly over 
both surfaces of the frond. 
Natives of both temperate zones. 
1. D. Kunthii, Agardli; — FI. N. Z. ii. 219. Frond 1 foot high, dis- 
tantly dichotomously decompound, narrowed at the nearly glabrous base, 
sinus acute; segments linear-elongate, quite entire, 3— j in. broad, rounded at 
the apex. Spores scattered in small superficial spathulate leaflets. — J. Ag. 
Sp. Alg. i. 94. Zonaria, Agardh, Icon. Ined. t. 15. 
Abundant on the coasts, J. D. H., etc. (Chili.) 
2. D. dichotoma, Lam.; — FI. N. Z. ii. 219. Frond 6-10 in. long, 
