Field Guide to Seagrasses of the Red Sea - Seagrass-Watch

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Rhizome The rhizome is smooth with long internodes and the rhizome is always covered by leaf scars at the stem base. Microscopic Leaf Anatomy The leaf contains large cells that are angular to hexagonal in shape (Plate 2). Similar Species • Halophila decipiens has hairs on both side of the leaf blade. Key Features • Length of leaves is long compared to the width and short stems (Plate 3). • Leaf margin serrated (Plate 4). • Clear obvious mid vein with branched cross veins (Plate 4). • Bulging sections (bullose) between the veins on the leaves (Plate 5). Diagnostic Features • The leaf sheath is a large transparent scale covering the short stem to form a lopsided structure on each leaf pair (Plate 6). Habitat Shallow Coastal/Back Reef Reef Deep Coastal 46
Leaf blade Mid vein Lopsided leaf sheath Close-up area Rhizome Serrated leaf tip Root (Plate 2) Mag. 20x (Plate 1) Lopsided leaf sheath Leaf blade Leaf tip Serrated leaf margin Bulging sections called bullose Large transparent leaf sheath Leaf veins Rhizome Mid vein (Plate 3) (Plate 4) Mag. 4x (Plate 5) Mag. 2x (Plate 6) Mag. 2x Field Guide to Seagrasses of the Red Sea 47
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Seagrasses Field Guide to of the Re
Page 4 and 5:
The designation of geographical ent
Page 7: Foreword The role of taxonomy in un
Page 10 and 11: viii
Page 12 and 13: history. Peter Forsskål, a Swedish
Page 14 and 15: Figure 1. Schematic map represents
Page 17 and 18: Shallow coastal habitat Seagrass me
Page 19 and 20: Bay (or Sharm) A Sharm is the Arabi
Page 21 and 22: An individual seagrass plant consis
Page 23 and 24: Cymodocea rotundata Ehrenberg & Hem
Page 25 and 26: Leaf tip Close-up area Two tips on
Page 27 and 28: Microscopic Leaf Anatomy Cells are
Page 29 and 30: Halodule pinifolia (Miki) den Harto
Page 31 and 32: Leaf blade Close-up area Leaf sheat
Page 33 and 34: Stem The stems are short, erect and
Page 35 and 36: Syringodium isoetifolium (Ascherson
Page 37 and 38: Cylindrical leaf blade Close-up are
Page 39 and 40: Microscopic Leaf Anatomy Cells are
Page 41 and 42: Wide flat leaf sheath Leaf scars on
Page 43 and 44: Enhalus acoroides (L.f.) Royle Enha
Page 45 and 46: Leaf blade Mag. 20x Close-up area (
Page 47 and 48: Microscopic Leaf Anatomy Cells angu
Page 49 and 50: Halophila ovalis (R. Brown) Hooker
Page 51 and 52: Dark colored dots Close-up area Ova
Page 53 and 54: Rhizome The rhizome is smooth, thin
Page 55: Halophila stipulacea (Forsskål) As
Page 59 and 60: Microscopic Leaf Anatomy Cell shape
Page 61: Glossary Bullose: bulb-shaped or bu
Page 64 and 65: Lipkin, Y. (1977). ‘Seagrass vege
Page 66: About the Guide This guide answers
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Field Guide to Seagrasses of the Red Sea - Seagrass-Watch

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