Time of bloom: July to September.
Seed-time: August to November.
Range: New Brunswick and Ontario to Georgia, westward to the Rocky Mountains. Habitat: Dry, open soil; fields, meadows, waste places.
Fig. 376. -Wild Lettuce (Lactuca canadensis). X 1/4.
Fig. 377. - Arrow-leaved Wild Lettuce (Lac-tuca sagittifolia). X 1/4.
Stem rather stout, smooth, two to six feet high, leafy to the flowering panicle. Leaves oblong-lance-shaped, smooth, somewhat thick, entire or the lower ones with a few shallow teeth, sometimes spinulose on the margins, those of the stem sessile, clasping, and auricled at base. Heads in a long, loosely branched, terminal panicle and in smaller axillary clusters; each about a quarter-inch broad, on slender pedicels, the rays reddish yellow; involucre cylin-dric, the outer bracts much shorter than the inner ones. Achenes oblong, flattened, shorter than the slender beak. Pappus fine and white. (Fig. 377.)
Means of control the same as for Prickly Lettuce.