Century Dictionary and Cyclopedia
- n. A genus of asteroid composites, coarse herbs or sometimes shrubby, with rather large radiate terminal heads of yellow flowers, and with the foliage usually covered with a viscid balsamic secretion. There are about 25 species, found in the western United States, Mexico, and Chili. From the amount of viscid secretion covering them, they are often known as gum-plants. Several species have been used medicinally in asthma, bronchitis, poisoning by species of Rhus (as poison-ivy), and other complaints.
- n. A plant of the genus Grindelia.
- n. In pharm., an official drug which consists of the leaves and flowering tops of Grindelia robusta and G. squarrosa. The name ‘California gum-weed’ has been used of the official grindelia in general, but only the former species is Californian, the latter being distributed only over the great interior region. G. robusta is somewhat preferred, and, though collected in large quantities in California, is said to be scarcer than G. squarrosa. The virtue of grindelia resides in the gum which exudes from the heads and upper leaves.
GNU Webster's 1913
- n. (Med.) The dried stems and leaves of tarweed (Grindelia), used as a remedy in asthma and bronchitis.
- n. large genus of coarse gummy herbs of western North and Central America
“Other plants include giant helleborine orchid Epipactis gigantea, button cactus Epithelantha micromeris, Guadalupe jewelflower Streptanthus sparsiflorus, Havard's gumweed Grindelia havardii and resurrection plant Selaginella pilifera.”
“Flowering phenology and outcrossing in tetraploid Grindelia camporum Greene.”
“Several species of Grindelia occur along the North American Pacific Coast in estuaries or salt marsh habitats.”
“Grindelia camporum is a 0. 5-1.5 m resinous perennial shrub.”
“Grindelia resins have properties similar to the terpenoids in wood and gum rosins, which are used commercially in adhesives, varnishes, paper sizings, printing inks, soaps, and numerous other industrial applications”
“With increasing costs and declining supplies of these wood-based materials, substitutions with Grindelia resins in this market (700,000 tons per year) may become practical.”
“Grindelia resins have properties similar wood rosins, which are used in a wide variety of industrial applications.”
“Diterpene acids from Pinus (a, b) and Grindelia (c, d) are remarkably similar.”
“Grindelia camporum: potential cash crop for the arid southwest.”
“The potential for the commercial utilization of resins from Grindelia camporum.”
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