PHYCOLOGICAL OBSERVATIONS VII. ON THE OCCURRENCE AND PHYCO-GEOGRAPHICAL DISTRIBUTION OF SARGASSUM DUPLICATUM AND HALICORYNE WRIGHTII IN THE PHILIPPINES

Abstract

The phyco-geographical distribution, based on the scheme designed by Cordero (1977), in the Philippine Archipelago of the two tropical marine algae, Halicoryne wrightii Harvey (Dasycladaceae, Chlorophyta) and Sargassum duplicatum J. Agardh (Sargassaceae, Phaeophyta), are presented. Observations show that H. wrightii flourishes well in the Inland Waters, while S. duplicatum grows favorably along the exposed coasts of the South China Sea and the Pacific Ocean. Also, records reveal that the northern-most occurrence of H. wrightii is in Ryukyu Islands, Japan, the southern-most in Bali, Indonesia, the westernmost on west coast of the Philippines, and the eastern-most on the Pacific coast of Japan; while in S. duplicatum, the northern-most occurrence is on the Pacific coast of central Japan, the southern-most in Australia, the western-most in Vietnam, and the eastern-most in Guam. Additional notes on the taxonomic descriptions of Philippine materials of H. wrightii and S. duplicatum are also included.