Najas minor.en.wikipedia.org. (Accessed 4/2014).

Najas minor is an annual submerged, rooted aquatic herb, stems 10-20 cm long, very slender, to 0.1 cm thick. 

Leaves opposite, 0.5-3.5 cm long, to 0.02 cm wide, needle-thin, margins minutely toothed, base expanded into a short sheath, margin fringed (use lens). 

Flowers very small, inconspicuous solitary in axil, unisexual (monoecious); male flowers with solitary anther; female flower with solitary ovary, one ovule, 2-4 elongate stigmas. 

Fruit single seed, purplish, to 0.3 cm long. 

Wetland status: OBL. 

Frequency in NYC: Very infrequent, but probably more common than indicated by collection. 

Origin: Eurasia, Africa. 

Habitat: Alkaline or high nutrient water, pH 6.3-7.2 quiet ponds.