Contains 2 genera and 2 accepted taxa overall.
This family is completely databased for all specimens.
Characteristics
CYMODOCEACEAE
Monocot
-
Classification
ALISMATALES
CYMODOCEACEAE
This species have been reported in the counties highlighted.
Genera
| Genus | Common Name | Taxa Count | Herbarium Specimens | Photos |
|---|---|---|---|---|
| Halodule | SHOALWEED | 1 | ||
| Syringodium | MANATEEGRASS | 1 |
Identification Key
1. Leaf blades flat, the tip truncate-dentate; flowers solitary; style simple; anthers attached at different levels on axis
1. Leaf blades cylindric, the tip rounded to truncate with marginal extensions; flowers in cymes; style divided into 2 stigmas; anthers attached at same point on axis
1. (Seagrass key) Leaf blades 0.3-2 mm wide, linear, without a distinct petiole
2
1. Leaf blades 0.6-12 mm wide, if <2 mm wide then usually petiolate and narrowly elliptic to linear-elliptic (Hydrocharitaceae)
4
2. Leaf blade tapered to a finely serrulate, acute tip (Ruppiaceae)
2. Leaf blade not tapered or only slightly so, not serrulate, the tip truncate to rounded with teeth or extensions (Cymodoceaceae)
3
3. Leaf blades flat, the tip truncate-dentate
3. Leaf blades cylindric, the tip rounded to truncate with marginal extensions
4. Leaf-bearing nodes separated by scaly rhizomes; leaves 10-60 cm long, petiole lacking; styles 6–8; fruits echinate, dehiscing into 6–8 irregular valves
4. Leaf-bearing nodes separated by naked rhizomes; leaves 0.5-3 cm long, petiole often apparent; styles 3–5; fruits smooth or ridged, not echinate, dehiscing by pericarp decay (Halophila)
5
5. Leaves 4-8 in a pseudowhorl at the terminus of an erect stem
5. Leaves usually 2 and petiolate, directly attached to rhizome
6
6. Blade narrowly elliptic to linear-elliptic, 0.6-4 mm wide, margin entire, glabrous; only pistillate flowers produced, staminate flowers absent or unknown
6. Blade oblong-elliptic, 3-8 mm wide, margin finely serrulate, pubescent to glabrous; staminate and pistillate flowers produced on same plant