=Parts used and prices.=—The flowering tops and leaves of this and of the scaly grindelia are collected indiscriminately, and bring from 5 to 12 cents per pound. They are used in asthma and similar affections, and externally in cases of poisoning by poison ivy. SCALY GRINDELIA. _Grindelia squarrosa_ (Pursh) Dunal. [Illustration: FIG. 18.—Scaly grindelia (_Grindelia squarrosa_ (Pursh) Dunal).] =Range.=—Scaly grindelia (fig. 18) has a wider distribution than the gum plant, being quite common on the plains and prairies from the Saskatchewan to Minnesota, south to Texas and Mexico, and westward to California. =Description.=—This species is very similar to the gum plant, with the exception that it is smaller and does not have the gummy appearance of the former. The slender, erect stems are from 1 to 2 feet high and somewhat sparingly branched near the top. The branches near the flower heads appear to be somewhat more reddish than in the species previously mentioned. In this species, also, the leaves are not borne on stalks, but are somewhat clasping at the base, and they are longer (about 2 inches long), not rigid, thinner, and more prominently toothed. The flowers are also very similar to those of the gum plant, but are smaller, the scales narrower, and the recurved tips longer and more slender. =Parts used.=—The leaves and flowering tops are collected with those of the gum plant, _Grindelia robusta_. BONESET. _Eupatorium perfoliatum_ L. [Illustration: FIG. 19.—Boneset (_Eupatorium perfoliatum_ L.).] =Other common names.=—Thoroughwort, crosswort, wood boneset, teasel, ague-weed, feverwort, thorough-stem or thorough-wax, vegetable antimony, sweating plant, Indian sage, wild sage, tearal, wild Isaac. (Fig. 19.) =Range and habitat.=—Boneset delights in moist situations, and is common as a weed in clayey or sandy soil, in low, wet ground, and along streams, on the edges of swamps and in thickets from the New England States west to Nebraska and south to Texas and Florida. =Description.=—One of the features which will aid in recognizing this plant is the peculiar arrangement of the leaves. These are opposite each other and joined together at the base around the stem, and therefore have the appearance of a single leaf with the stem passing through the center of it.