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656 University of California Publications in Botany [Vol. 8
Weber and Mohr, Deitrage zur Naturkunde, vol. 1, 1805, p. 300;
Howe, Mar. Alg. Peru, 1914, p. 69. Dictyopteris Lamouroux, Observ.
Phys., 1809, p. 332. HaJystris Agardh, Sp. Alg., vol. 1, 1820, p. 141.
We have adopted the opinion of Howe as regards the proper
designation of this genus which is readily recognized among the
genera of our coast by its percurrent midrib, although our species has
somewhat the superficial aspect of a Zonaria.
Neurocarpus zonarioides (Farlow) Howe
Plate 34, fig. 4; plate 35, fig. 11; plate 36, fig. 21; plate 38, fig. 39, and plate 9.1
Fronds arising from a stupose base, 8-24 cm. high, densely and
irregularly dichotomous, ultimate dichotomies short, with prominent,
percurrent midrib, tomentose below, and laminae without lateral veins,
much incised and lacerate above, soon disappearing below ;
color when
young, yellowish brown, dingy brown or almost black on drying ;
ulti-
mate segments often subflabellate, short, somewhat divergent, with
obtuse or slightly refuse tips ; aplanosporangia numerous, arranged in
sori parallel to the midrib on both sides of the frond, 75-100//, diam.
Growing on rocks in the lower littoral and upper sublittoral belts.
Known only from southern California and northern Lower California
(Ensenada).
M. A. Howe, Mar. Alg. Peru, 1914, p. 69 ; Setchell and Gardner,
Mar. Alg. Gulf of Calif., 1924, p. 728. Dictyopteris zonarioides
Farlow, in Erythea, vol. 7, 1899, p. 73
; Collins, Holden and Setchell.
Phyc. Bor.-Amer. (Exsicc), no. 581. Haliseris polypodioides
McClatchie, Seedless plants of southern Calif., 1897, p. 354.
Farlow and Howe have made plain the characteristics of this
species. Its nearest rlative seems to be N. Cokcri Howe of the Peru-
vian coast. For exact information, Howe's comparison (loc. cit.)
should be consulted.
61. Taonia J. Ag.
Fronds plane, ecostate, attached by a more or less stupose base,
flabellate, the cuneate segments more or less deeply divided and dis-
sected into narrow laciniae, composed of two distinct tissues, a medulla
of several layers (usually 4) of larger colorless cells, surrounded by a
single layer of cuboidal, color bearing cells, arranged mostly in longi-
tudinal series; aplanospores scattered or arranged vaguely in concen-
tric zones, usually abundant ;
individuals.
oogonia and antheridia on different