This section is from the book "A Manual Of Weeds", by Ada E. Georgia. Also available from Amazon: A Manual Of Weeds.
Franseria tomentosa, Gray (Gaertneria tomentosa, Kuntze)
Native. Perennial. Propagates by seeds and by rootstocks. Time of bloom: July to September. Seed-time: September to November. Range: Montana, southward to Colorado and Kansas. Habitat: Moist, rich soil; cultivated ground, meadows, pastures, and waste places.
Similar to the preceding plant, the two often growing in company. It is larger, the stems usually one to three feet tall, erect, branching from the base, covered with fine, white-woolly hair. Leaves softly woolly on both sides or silky and ashy above, pinnately three- to seven-lobed, with segments lance-shaped, usually toothed, the middle, or terminal, lobe much the largest. Sterile racemes usually solitary, two to four inches long, the heads crowded and a little larger than F. discolor. Fertile involucres usually solitary in the upper axils, about a quarter-inch long, softly woolly, and set with very sharp spines, which are finely hooked at the very tip so that sheep and other animals catch them at a touch and they are even more readily and extensively distributed than the preceding species.
Means of control the same as for the preceding plant