Appearance
General: Semi-parasitic, hairy annual, the stem 5-20 cm. tall, often well-branched.Leaves: Leaves all cauline, mostly opposite, often alternate above, ovate to broadly elliptic, deeply toothed.
Flowers: Inflorescence a leafy-bracteate, terminal spike, the bracts broad and toothed; flowers white, often violet-tinged or with purple veins or a yellow spot; calyx deeply 4-cleft; corolla bi-labiate, the upper lip shallowly 2-lobed, the lower lip deeply 3-lobed, the lobes slightly notched; stamens 4; stigma entire.
Fruits: Capsule.
Naming
Euphrasia americana Wettst.Euphrasia arctica Lange ex Rostrup ssp. borealis (F. Towns.) Yeo
Euphrasia borealis (Townsend) Wettst.
Euphrasia curta (Fries) Wettst.
Distribution
introducedHabitat
Disturbed areas.References:
Some text fragments are auto parsed from Wikipedia.
http://biology.burke.washington.edu/herbarium/imagecollection/taxon.php?Taxon=Euphrasia%20nemorosa