Contains 4 accepted taxa overall.
Characteristics
Classification
Citation
NAJAS Linnaeus, Sp. Pl. 1015. 1753.
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TYPE: Najas marina Linnaeus
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Najas filifolia | Narrowleaf Naiad | |||
| Najas gracillima | Slender Naiad, Bushy Naiad | |||
| Najas guadalupensis var. guadalupensis | Common Naiad, Southern Naiad | |||
| Najas minor | Spinyleaf Naiad |
Identification Key
1. Internodes usually with prickles; leaf midrib with prickles; testa pitted, 10-15 cell layers thick
1. Internodes and leaf midrib without prickles; testa smooth or pitted, 3 cell layers thick
2
2. Leaf margins minutely serrulate, usually >15 teeth per side, the teeth unicellular
2. Leaf margins conspicuously serrulate, usually <16 teeth per side, the teeth multicellular
3
3. Leaves spreading to ascending with age; seeds not recurved
3. Leaves usually becoming recurved with age; seeds recurved
4
4. Leaves becoming laxly stiff, with 5-9 teeth per side; seeds strongly recurved, greenish brown, the areoles regularly arranged in ca. 20 longitudinal rows, not ladderlike, 4-angled, longer than broad, end walls raised
4. Leaves stiff, with 7-15 teeth per side; seeds slightly recurved, purplish, testa dull, 3 cell layers thick, pitted, the areoles regularly arranged in ca. 15 longitudinal rows, ladderlike, 4-angled, broader than long, end walls not raised
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|---|---|---|
| No synonyms found. | |||