Myriophyllum humile low water-milfoil Haloragaceae MYHU; R (DeCandido 2001);


Myriophyllum humile.Paul Skawinski.Robert W. Freckmann

Myriophyllum humile.©Paul Skawinski 2010.Robert W. Freckmann Herbarium.University of Wisconson at Stevens (Accessed 4/2014).

Myriophyllum humile is a submersed to emersed perennial aquatic herb to 1 m long, stem tip often above water surface when flowering; underwater stems lax. 

Leaves alternate, sub-opposite, irregularly scattered, sometimes whorled; pinnate, very finely divided, to 3.7 cm long, leaflets thread-like; stems emerging above surface or on mud, with leaves alternate, linear, undivided, or slightly pinnate. 

Flowers brownish, small, 4-parted, axillary when submersed, or in short emergent spikes; blooms and fruits July-Sept.; Wind pollinated (Magee 1981). 

Fruit hard, nut-like, 4-lobed, 0.1 cm. 

Wetland status: OBL. 

Frequency in NYC: Very infrequent. 

Origin: Native. 

Habitat: In quiet water or rooting in mud.