Glossophora kunthii (C.Agardh) J.Agardh

THE NfcW YORK BOTANICAL GARDEN
MARINE ALQAE OF PERU, COLLECTED BY ROBERT E. COKER
NEW YORK BOTANICAL GARDEN
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Glossophora Kunthii (Ag.) J. Ag. loc. cit. no
"Zonaria Kunthii Ag. Icon. Alg. Ined. 2: pi. 15? 1821.
In beach drift, La Punta, region of Callao, December 1906,
Coker 23 p.p.-, also, Jan. 25, 1907, Coker 32; “dredged very close
to the Island of San Lorenzo,” region of Callao, Feb. 5, 1907,
'Glossophora	73
Coker 56 (plate 28); in the surf, Island of San Lorenzo, Feb. 5
1907, Coker 57 p p-\ on surf-washed rocks, Chincha Islands, June
18, 1907, Coker 192 p.p.', also, in same locality and habitat,
July 13, 1908, Coker 493 p.p.; in one fathom, Isla Vieja, Bahia de
la Independencia, July 20, 1907, Coker 09640 p.p.
Nos. 23,32, 56, and 57 are from the type locality or near it.
The specimens collected represent various ages and sizes of the
plant, yet all of the mature ones, so far as we have examined them
microscopically, appear to be tetrasporic. The largest plants
collected attain a length of a little more than 30 cm. In the
younger and middle-aged plants, a cross section of the thallus
very commonly shows only a single layer of cells in the cortex,
but in the older conditions the cortex consists of two and occa-
sionally three layers, if one includes in the “cortex” a layer that
often has a character somewhat intermediate between the surface
layer and the medulla. We rarely find J. Agardh’s “fila brevia
verticalia” except in the basal parts. The tetrasporangia occur
on both the main thallus and the outgrowths from its surface. In
the best-developed condition (no. 23), both surfaces of the thallus,
with the exception of basal portions and occasional margins,
are very densely covered with ligulate or spatulate foliola, which
are often dichotomous, proliferous, or subpinnately compound,
and commonly bear more or less numerous root-hairs on their
margins and ventral surfaces.
The original specimens were brought from Callao and “ Guan-
chaco ” by Humboldt. The species has since been reported from
the region of Callao by Piccone (Alg. Vettor Pisani 33. 1886).
Pilger (Hedwigia 48: 178. 1908) attributes it to Chile also.
JPlate 28. Glossophora Kunthii
Photograph of a dried specimen {.Coker 56), reduced to about two fifths of the
natural dimensions.
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