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RIVULARIA plicata.
Capt. Carmichael’s Rivularia.
CRYPTOGAMIA Alga.
Gen. Char. Frond fleshy or gelatinous, composed
of radiating filaments articulated within, surrounded
by gelatine, and springing from a globose
or elliptic base.
Spec. Char. Fronds rather large, densely gregarious,
compresso-plicate, often hollow and ruptured,
dark green; filaments spuriously dichotomous,
attenuated.—Harv.
Syn. Rivularia plicata. Carm. MSS. Harv. Man.
151.
Lichenoides, &c. Dillen. Muse. t. 19.ƒ. 19. Raii
Syn. ed. 3. 478.
Lichen corrugatus. Dicks. Fasc. 4. 26.
Collema corrugatum. Ach. Lich. Un. 642. Syn.
318. Hook. Eng. FI. v. 5. pt. 1. 210.
O n the muddy shore of the Chichester Creek near Dell-
quay, Mr. Jenner; Ilfracombe, Mr. Ralfs; from which localities
we received our specimens. Other stations are mentioned
in Harvey’s Manual.
Fronds from one line to half an inch in diameter, crowded
and distorted, of a firm gelatinous substance, at length often
hollow and ruptured, dark green. Filaments springing from
an elliptic base, arranged dichotomously, attenuated, but
rather obtuse at the apex, filled with rings, which are nar