496 HowWE: PHYCOLOGICAL STUDIES 
CoILODESME —————? 
La Paz, Vives r8c. 
Poor and fragmentary material, but it seems to be closely 
related to Coilodesme californica (Rupr.) Kjellm. 
SARGASSUM —————? 
La Paz, Vives 18d. 
A fragment of a plant of the Eusargassum section, with thin 
linear-lanceolate serrate-ciliate leaves 6-8 cm. long and 7-12 mm. 
in greatest width; cryptostomata inconspicuous or wanting; leaf 
margins here and there approaching a biserrate condition. 
SARGASSUM —————? 
La Paz, Vives r. 
A single plant a meter or more in length, sterile or with very 
immature receptacles. Resembling Vives 18d, but the lanceolate 
or linear-lanceolate leaves (2-9 cm. long, 5-14 mm. in greatest 
width) have much more conspicuous cryptostomata. The texture 
of the leaves is thin-membranous and the margins are irregularly 
serrate, the teeth often terminating in soft somewhat cilium-like 
points. The vesicles are subglobose and muticous, the largest 
attaining a diameter of 6-8 mm. Both this and 18d, which is 
possibly a form of the same thing, are quite different from Sargas- 
sum Liebmanni J. Ag. and S. Agardhianum Farl., which, so far 
as we are aware, are the only two species of Sargassum that have 
thus far been described from the Pacific coast of North America. 
The plants suggest broad-leaved forms of S. Filipendula (Ag.) J. 
Ag., but we are unwilling to refer them to that species and unwilling 
also, with the material at hand, to propose a new specific name 
in a genus in which more than two hundred more or less imper- 
fectly understood species have already been proposed. 
In the herbarium of the New York Botanical Garden (ex herb. 
C. L. Anderson) are four fragments of a Sargassum from La 
Paz, Baja California, which have leaves resembling those of Vives z 
in form, size, margin, and cryptostomata, but are rather more 
coriaceous. One of the specimens is accompanied by a long (12 
cm.) lax leafless panicle of receptacles. The panicle is detached 
but probably belongs with the accompanying stem and leaves. 
