Parentucella viscosa is an annual, herbaceous species of the Scrophulariace or figwort family with sticky, hirsute stems reaching 20 to 30 cm in height. Light green, 2 to 3cm long sessile leaves with toothed margins are arranged opposite one another along the stem. Near the apex of the stem, a spike-like raceme is formed containing the yellows two-lipped flowers reaching only 1.5 to 2 cm out of green bracts that alternate in arrangement on the stem with the flowers. The two-lobed upper lip of the flower is shorter than the three-lobed lower lip as well as much harrier. The flowers produce capsule containing many small, smooth seeds.
P. viscosa is likely to be found in moust grassy sites, clearing or pastures and is very common in settled areas west of the Cascade mountain range. The distribution of the species reaches from Washington to northern California and has a disjunct population in southeastern Texas.
As a native of the Mediterranean, the P. viscosa is not a native of the northwestern United States. but is considered a weedy species. P. viscosa is the only memeber of the genus found in the Pacific Northwest.
The specific epithet of the this species is in honor of the founder of the Rome Botanical Garden, Thomas Patentucelli.
Hitchcock, C.L. and A. Cronquist (1994) Flora of the Pacific Northwest, University of Washington Press, Seattle and London.
Kozloff, E.N. (1976) Plants and Animals of the Pacific Northwest. University of Washington Press, Seattle and London.
Pojar, J. and A. McKinnon (1994) Plants of the Pacific Northwest Coast. Lone Pine Publishing, Washington, Canada.
Venning, F.D. (1984) Wildflowers of North America: a guide to field identification. Golden Books Publishing Company, New York.