Pterosiphonia dendroidea (Mont.) Falkenb.

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Pterosiphonia dendroidea (Mont.) Falkenb.
Rhodomelaceen 268. 1901
Polysiphonía dendroidea Mont. Ann. Sci. Nat. Bot. II. 8: 353-
1837; FI. Boliv. 16. pl. 5. f. 1. 1839. Kütz. Tab. Phyc. 13:
9. pi. 25. f. a, b. 1863.
Polysiphonía spinifera Kütz. Phyc. Gen. 4x6. 1843; Tab. Phyc.
13: 9. pi. 24. f. a-d. 1863.
Polysiphonía Bartlingiana Kütz. Phyc. Gen. 416. 1843; Tab.
Phyc. 13: 9- Pl- 24? /• «>•/• i863-
Polysiphonía calliptera Kütz. Phyc. Gen. 417. 1843; Tab. Phyc,
13: 9. pl. 25 . f. c, d. 1863.
Polysiphonía parasitica /3 dendroidea (Mont-..) J. A'g. Sp. Alg. 2: 931.
1863.	. . '
In beach drift, La Punta, region of Callao, January 25, 1907,
Coker 35 p.p.; dredged in about five fathoms, between San Lorenzo
and La Punta, February 5, 1907, Coker 58 p.p.] pulled up with a
fish-line from six fathoms, Bay of Pacasmayo, March 14, 1907».
Coker 123 p.p.; dredged in about five fathoms, Bay of Sechura,
April 8, 1907, Coker 157 p.p.-, on surf-washed rocks, Chincha
Islands, June 18, 1907, Coker 195 P-P-Vfrom drift on the beach,
Pisco, July 7, 1908, Coker 465 P-P-
All of the first four specific names cited above were originally
applied to plants collected on the coast of Peru and we adopt for
the present Falkenberg’s opinion that they apply to forms of a
single variable species. Some of Dr. Coker’s specimens (58 and
one of the four under 465) are near Montagne’s type except in
being smaller; the others are close to Kützing’s Bartlingiana and
spinifera. The typical form and spinifera occur together under
no. 465 and are strikingly different in habit, but the Bartlingiana
forms found elsewhere appear to make it difficult to consider them
distinct species. Most of the specimens are apparently sterile
but of those under 123, one is cystocarpic and some others are
incipiently tetrasporic. Of those under 465, the one just alluded
to as being close to the type bears cystocarps.
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