OregonFlora: Lemna aequinoctialis vs. Lemna minuta

	Lemna aequinoctialis	Lemna minuta
		least duckweed
Roots		up to 1.5 cm long.
Turions		absent.
Plant bodies		floating on the surface, widely elliptic to oblong or obovate; (0.8)1– 2.5(4) mm long, 1–2 times longer than wide, slightly thicker in the middle with thinner margins, 1 vein, often faint; less than 67% the distance from root attachment to apex; lower surface flat, green; upper surface flat, green; and usually smooth, sometimes with papillae along the midline, generally in clusters of 2 (sometimes 4).

	Lemna aequinoctialis	Lemna minuta
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion		Freshwater. 50–1400 m. BR, CR, Owy, WV. CA, NV, WA; throughout North America; South America; Eurasia. Native. This is the smallest Lemna species in Oregon.
Source		Flora of Oregon, volume 1, page 149 Katie Mitchell
Sibling taxa	L. gibba, L. minor, L. minuta, L. trisulca, L. turionifera, L. valdiviana	L. gibba, L. minor, L. trisulca, L. turionifera, L. valdiviana
Synonyms		Lemna minima
Web links	Local floras: CA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Lemna aequinoctialis

Lemna minuta

least duckweed

Roots

up to 1.5 cm long.

Turions

absent.

Plant bodies

floating on the surface, widely elliptic to oblong or obovate; (0.8)1– 2.5(4) mm long, 1–2 times longer than wide, slightly thicker in the middle with thinner margins, 1 vein, often faint; less than 67% the distance from root attachment to apex;

lower surface flat, green;

upper surface flat, green; and usually smooth, sometimes with papillae along the midline, generally in clusters of 2 (sometimes 4).