. Botany, an elementary text for schools. Botany. 340 THE KINDS OF PLANTS 17. ERfGERON. Fleabanb. Annual, biennial or perennial erect herbs, with simple, sessile leaves: heads few- to many-flowered: rays numerous in several rows and pistillate: scales of involucre narrow and equal, scarcely overlapping, not green-tipped : torus flat or convex, naked: pappus of soft bristles. a. Says very inconspicuous. E. Canadensis, Linn. Horse-weed. 3Iare's-tail. Fig. 500. Tall, erect, weedy, hairy annual, with strong scent : leaves linear and mostly entire or the root-leaves lobed: heads small and very nume
. Botany, an elementary text for schools. Botany. 340 THE KINDS OF PLANTS 17. ERfGERON. Fleabanb. Annual, biennial or perennial erect herbs, with simple, sessile leaves: heads few- to many-flowered: rays numerous in several rows and pistillate: scales of involucre narrow and equal, scarcely overlapping, not green-tipped : torus flat or convex, naked: pappus of soft bristles. a. Says very inconspicuous. E. Canadensis, Linn. Horse-weed. 3Iare's-tail. Fig. 500. Tall, erect, weedy, hairy annual, with strong scent : leaves linear and mostly entire or the root-leaves lobed: heads small and very numerous in a long panicle, the rays very short, aa. Says prominent; common fleabanes. E. dnnuus, Pers. Usually annual, 3-5 ft., with spreading hairs: leaves coarsely and sharply toothed, the lowest ovate and tapering into a margined petiole: rays numerous, white or tinged with purple, not twice the length of the involucre. E. strigdsus, Muhl. Usually annual, with oppressed hairs or none: leaves usuallj^ entire and narrower: rays white and numerous, twice the length of the involucre. 18. CALLtSTEPHUS. China Astek. Erect, leafy annuals, with large solitary heads bearing nu- merous white, rose or purple rays: scales in several rows or series, usually leafy: torus flat or nearly so, naked: pappus of long and very short bristles. C. hort^nsis, Cass. Common China aster, now one of the commonest of garden annuals, in many forms: leaves sessile and coarsely toothed. China. 19. EUPATORIUM. Boneset. Erect perennials, with simple leaves: heads small and rayless, clustered, all the florets perfect : scales not leafy : torus flat or low-conical, naked : akene 5-angled: pappus a single row of soft bristles. Low grounds. E. purpiireum, Linn. Joe Pye weed. Tall, with purplish stem and lan- ceolate toothed leaves in whorls of 3-6 : heads flesh-colored, in dense corymbs. Swamps, growing 3-10 ft. E. perfoli^tum, Linn. Boneset. Tlioroughwort. Fig. 159. Two to 4 ft., hairy: leaves opposite and sessile
Size: 807px × 3098px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbai, bookcentury1900, bookdecade1900, booksubjectbotany
