. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 33. 1 mm 1. Habit of plant. 2. Marginal teeth. 3. Leaf apex with marginal veins meeting center vein. MAGNOLIOPHYTA Hydrocharitaceae, Butomales Halophila decipiens Ostenfeld 1902:260, with fig. Plants delicate, small, in leafy patches; to 1 m in diam.; bright green; stem slender, 3-15 mm long; leaves to 3 mm wide, 3-6 mm long, oval, one pair per node; leaf margin with extremely fine teeth; rhizome extensive; major root descending below each pair of leaves, soon covered by fine rootlets. Leaves with central vein
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 33. 1 mm 1. Habit of plant. 2. Marginal teeth. 3. Leaf apex with marginal veins meeting center vein. MAGNOLIOPHYTA Hydrocharitaceae, Butomales Halophila decipiens Ostenfeld 1902:260, with fig. Plants delicate, small, in leafy patches; to 1 m in diam.; bright green; stem slender, 3-15 mm long; leaves to 3 mm wide, 3-6 mm long, oval, one pair per node; leaf margin with extremely fine teeth; rhizome extensive; major root descending below each pair of leaves, soon covered by fine rootlets. Leaves with central vein of rectangular cells; margin veins splitting from central vein at leaf base, paralleling margin, meeting central vein again just below leaf apex; rhizome mm diam.; roots mm diam.; rootlets colorless, 10-20/xm diam. Fracture zone specimens: Wall of east fracture, 4 m deep on mangrove peat, , D&MLittler 25080 (US). Bottom of east fracture, 7 m deep on mangrove peat, , D&M Littler 25111 (US). Bottom of central fracture, 7 m deep on mangrove peat, , D&M Littler 25004 (US). Bottom of west fracture, 7 m deep on mangrove peat, , D&M Littler 25180 (US).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]
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