This section is from the book "A Manual Of Weeds", by Ada E. Georgia. Also available from Amazon: A Manual Of Weeds.
Introduced. Annual. Propagates by seeds.
Time of bloom: July to September.
Seed-time: August to October.
Range: Nova Scotia to Oregon, southward to Georgia and Mexico.
Habitat: Roadsides and waste places.
Its name of Turnpike Geranium indicates the fondness of this weed for the public road, where it is usually an unsightly object, with its glandular, hairy leaves and flowers overlaid with dust. It is strong-scented, with an odor somewhat like turpentine, and grazing animals, even sheep, usually leave it alone.
Stem eight inches to two feet tall, slender, erect, simple or with very few branches, green, glandular-hairy, and viscid. Leaves oblong, pinnately lobed, obtuse at apex, the lobes also obtuse with crenate teeth; petioles slender, short, the upper leaves becoming sessile. Flowers in spreading, cyme-like racemes, small, green, viscid, very numerous; calyx-lobes pointed, hairy, not quite covering the small, flattened seed.
Means of control should be the same as for the Wormseeds.