406 
Fig. 21. Turbinaria ornata: Habit of a plant exclusive 
of base and attachment stolons, X 1.5. 
Key to the Species of Sargassum 
1. "Leaves” coarse, thick, + ~ fleshy, at 
least below, about two thirds as broad as 
long S. crassifolium 
"Leaves” not thick or fleshy, mostly more 
than twice as long as broad 2 
2. Vesicles with prominent foliose margins 
S. mcclurei 
Vesicles smooth, apiculate or bearing 
spines, but without foliose margins .... 3 
3. Vesicles about 1.5 cm. long; axes flat, at 
least in part S. sp. 2 
Vesicles all less than 1 cm. long; axes 
+ — cylindrical throughout 4 
4. "Leaves” mostly linear 5 
"Leaves” not linear 6 
5 . Vesicles elongate, apiculate, without spines 
S. sp. 4 
Vesicles H rotund, not apiculate, some- 
times bearing spines S. sp. 1 
PACIFIC SCIENCE, Vol. VIII, October, 1954 
6. Attached by ramified stolons 
S. polycystum 
Attached by a discoid or cone-shaped 
holdfast 7 
7. "Leaves” with abundant, fine, sharp teeth; 
vesicles elongate, apiculate S. sp. 3 
"Leaves” with irregular, coarse or blunt 
teeth; vesicles rotund, not apiculate but 
often bearing teeth S. sandei 
Sargassum polycystum C.Agardh 1824: 304 
(Sunda Straits); Yamada 1942^: 376, figs. 
5, 6; Yamada 1950: 193 
Fig. 22t, u 
LOCAL DISTRIBUTION: On rocks, Sta. 3 
(11167); in drift, Sta. 11 (11351). 
The production of creeping stolons from 
the base of this species is distinctive. 
Sargassum mcclurei Setchell 1933: 45, pi. 
19 (Hong Kong) 
Fig. 22k-o 
LOCAL DISTRIBUTION: Drift, Sta. 11 (11360); 
drift, Sta. 2 (11423). 
Sargassum crassifolium J. Agardh 1848: 
(Tropical Africa and Southwest Pacific) 
326; Yamada 1942^: 511, fig. 14. 
Fig. 22/ 
LOCAL DISTRIBUTION: Exposed rocks, Sta. 
10 (11345). 
Sargassum sandei Reinbold, in Weber van 
Bosse 1913: 158, fig. 47, pi. 4 (Flores Is- 
land, Indonesia) 
Fig. 22r, j- 
LOCAL DISTRIBUTION: On Outer rocks, Sta. 
11 (11416). 
Sargassum sp. 1 
Fig. 22g, h 
LOCAL DISTRIBUTION: In drift, Sta. 2 (11359), 
about 3 meters long. 
