Contains 5 accepted taxa overall.
Characteristics
Classification
Citation
LEMNA Linnaeus, Sp. Pl. 970. 1753, nom. cons.
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TYPE: Lemna minor Linnaeus, typ. cons.
Species
| Scientific Name | Common Name | Status | Photos |
|---|---|---|---|
| Lemna aequinoctialis | LESSER DUCKWEED | Native OBL (NWPL) | |
| Lemna minor | COMMON DUCKWEED | Native OBL (NWPL) | |
| Lemna minuta | LEAST DUCKWEED | Native OBL (NWPL) | |
| Lemna obscura | LITTLE DUCKWEED | Native OBL (NWPL) | |
| Lemna valdiviana | VALDIVIA DUCKWEED | Native OBL (NWPL) |
[Family identification key]
1. Frond with 1 vein (sometimes obscure or subtle)
2
1. Frond with 3-5(-7) veins (sometimes obscure or subtle)
3
2. Midvein not longer than ⅔ the distance from the node to the apex; seed with 12-15 indistinct ribs
2. Midvein at least ¾ of distance from the node (point of root attachment) to the apex; seed with 15-29 indistinct ribs
3. Root sheath winged at base; root tip usually sharp pointed; roots to 3(-3.5) cm; fronds without reddish color or spots of anthocyanin, mostly with 1 very distinct papilla near apex on upper surface
3. Root sheath not winged; root tip mostly rounded; roots often longer than 3 cm; fronds often with reddish tinge or spots of anthocyanin, with or without distinct papilla near apex on upper surface
4
4. Fronds 1.3-2 times longer than wide, not reddish on the lower surface (or at least much less so than on upper); greatest distance between lateral veins near or proximal to middle
4. Fronds 1-1.5 times longer than wide, often reddish on the lower surface (more intensely so than on upper); greatest distance between lateral veins near or distal to middle