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Questions and Answers
Which of the following species has very long ribbon-like leaves with enrolled leaf margins?
Which of the following species has very long ribbon-like leaves with enrolled leaf margins?
What is the leaf blade length of Halophila decipiens?
What is the leaf blade length of Halophila decipiens?
1-2.5 cm
Halophila ovalis has more than eight pairs of cross veins.
Halophila ovalis has more than eight pairs of cross veins.
False
Which species is known for its fern-like structure and erect shoots up to 15 cm long?
Which species is known for its fern-like structure and erect shoots up to 15 cm long?
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Describe the leaf structure of Thalassia hemprichii.
Describe the leaf structure of Thalassia hemprichii.
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Cymodocea rotundata has a __ leaf tip and a wide leaf blade.
Cymodocea rotundata has a __ leaf tip and a wide leaf blade.
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Which species has cylindrical leaves that taper to a point?
Which species has cylindrical leaves that taper to a point?
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Match the following seagrass species with their characteristics:
Match the following seagrass species with their characteristics:
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Study Notes
Enhalus acoroides
- Long ribbon-like leaves with enrolled leaf margins
- Thick rhizome with long black bristles and cord-like roots
- Leaves can grow up to 150 cm long
Halophila capricorni
- Small oval leaf blade, 1-2.5 cm long
- 6-8 cross veins
- Leaf hairs on both sides
Halophila decipiens
- Small oval leaf blade
- 6-8 cross veins
- Leaf hairs on both sides
Halophila minor
- Less than eight pairs of cross veins
- Small oval leaf blade
Halophila ovalis
- Eight or more cross veins
- No hairs on leaf surface
Halophila spinulosa
- Fern-like leaves arranged in opposite pairs
- Erect shoot up to 15 cm long
Halophila tricostata
- Short black bars of tannin cells on leaf
- Thick rhizome with scars between shoots
- "Sickle-shaped" leaves
- Leaves 10-40 cm long
Thalassia hemprichii
- Rounded leaf tip
- Narrow leaf blade (2-4mm wide)
- Leaves 7-15 cm long
- 9-15 longitudinal veins
- Well-developed leaf sheath
Cymodocea rotundata
- Rounded leaf tip
- Narrow leaf blade (2-4mm wide)
- Leaves 7-15 cm long
- 9-15 longitudinal veins
- Well-developed leaf sheath
Cymodocea serrulata
- Serrated leaf tip
- Wide leaf blade (5-9 mm wide)
- Leaves 6-15 cm long
- 13-17 longitudinal veins
Halodule uninervis
- Trident leaf tip
- 1 central vein
- Usually pale rhizome, with clean black leaf scars
Halodule pinifolia
- Cylindrical in cross-section
- Leaf tip tapers to a point
- Leaves 7-30 cm long
Syringodium isoetifolium
- Cluster of ribbon-like curved leaves at the end of a very long elongate shoot
- "Woody" rhizome
- Erect shoots 10-65 cm long
Thalassodendron ciliatum
- Thin, translucent leaf blades
- 5 longitudinal veins
- Cross veins
Zostera capricorni
- Thin, translucent leaf blades
- 5 longitudinal veins
- Cross veins
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Description
Test your knowledge on various seagrass species with this quiz! Learn to identify different characteristics of species such as Enhalus acoroides and Halophila spp. by their leaf forms, rhizomes, and other distinguishing features.
