Resumo

AGUILAR-ROSAS, Raúl; AGUILAR-ROSAS, Luis E.  e  NUNEZ-CEBRERO, Filiberto. The genus Porphyra (Bangiaceae, Rhodophyta) in the Pacific coast of Mexico. III. Porphyra gardneri (G. M. Smith et Hollenberg) Hawkes. Hidrobiológica [online]. 2003, vol.13, n.4, pp.255-261. ISSN 0188-8897.

The occurrence and seasonality of Porphyra gardneri (G. M. Smith et Hollenberg) Hawkes (Bangiaceae, Rhodophyta) is recorded for the Pacific coast of México on the basis of field trips to the western coast of Baja California, conducted in 1992, 1995, 2001, 2002, 2003. Specimens previously deposited in various herbaria were also examined. Populations from Islas de Todos Santos, Caminitos and La Bufadora, are new records of P. gardneri from western Baja California and they represent the southern limit of this species along the Pacific coast of North America. The small size, low frequency and epiphytic character of P. gardneri could be the reasons for its poor presence in floristic studies previously done in Baja California. We describe in detail the vegetative and reproductive structures on the thallus as well as the habitat and geographic distribution of the species.

Palavras-chave : Baja California; Bangiaceae; Mexico; Porphyra gardneri; Pacific of Mexico; Rhodophyta.

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