. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 28. 200 fan 100 ^m 1. Habit of plant. 2. Branchlet apex with tufted filaments arising from terminal depression. 3. Immature surface cells. 4. Elongated mature surface cells. 5. Cross section of main axis. Laurencia implicata J. Agardh 1852 [1852-1863]: 745. Conspecific with Laurencia intricata Lamouroux 1813: 131, plate 9 (figures 8 and 9) - see Silva et al. 1987:66. Thallus fleshy, gregarious, in loose mats or solitary; 5-10(-25) cm tall; yellow-green, stubby branchlets often rose; branching sparse, irregular
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 28. 200 fan 100 ^m 1. Habit of plant. 2. Branchlet apex with tufted filaments arising from terminal depression. 3. Immature surface cells. 4. Elongated mature surface cells. 5. Cross section of main axis. Laurencia implicata J. Agardh 1852 [1852-1863]: 745. Conspecific with Laurencia intricata Lamouroux 1813: 131, plate 9 (figures 8 and 9) - see Silva et al. 1987:66. Thallus fleshy, gregarious, in loose mats or solitary; 5-10(-25) cm tall; yellow-green, stubby branchlets often rose; branching sparse, irregularly alternate; branchlets mm diam., cylindrical, rarely club shaped, irregularly alternate, occasionally opposite; apices tufted; holdfast fibrous. Apical cell sunken in terminal depression; pericentral cells 4, occasionally io 6; branch central cells large, colorless, thin walled, decreasing in size toward surface; surface cells deeply pigmented, 40-50 fim diam., to 70 jum long; apices tufted with inconspicuous, fine, dichotomously branched filaments in terminal depression; tetrasporangia just below apices of branchlet, beneath surface cells, forming minute raised areas; spermatangial clusters in apical depression, small, oval, or barrel shaped; pericarps (envelope surrounding cystocarp) partly embedded. Fracture zone specimen: Seagrass bed of central fracture, 3 m deep on mangrove peat, 1993, D&M Littler 25033 (US). Seagrass bed of west fracture, 3 m deep on mangrove peat, 20MA993, D&M Littler 25150 (US). Wall of west fracture, 4 m deep on mangrove peat, , D&M Littler 25172 (US). (Da !- 2 mm Ay- ^. 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 M
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