. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. COMPOSITES 443 scales of involucre narrow and equal, scarcely overlapping, not green-tipped; torus flat or convex, naked; pappus of soft bristles. a. Rays very inconspicuous. E. canadensis, Linn. Horse-weed. Mare's-tail. Fig. 560. 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. Rays prominent: common fleabanes. E. annuus, Pers. Usually annual, 3-5 ft., with
. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. COMPOSITES 443 scales of involucre narrow and equal, scarcely overlapping, not green-tipped; torus flat or convex, naked; pappus of soft bristles. a. Rays very inconspicuous. E. canadensis, Linn. Horse-weed. Mare's-tail. Fig. 560. 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. Rays prominent: common fleabanes. E. annuus, 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. ramosus, BSP. Daisy Jtcabane. Usually annual, with appressed hairs or none: leaves usually entire and narrower: rays white and numerous, twice the length of the involucre. E. pulchellus, Michx. Robin's plantain. Perennial leafy- stemmed herb, softly hairy, producing stolons or rooting branches from the base, the simple stems, from a cluster of rather large, roundish, short-petioled, serrate, root-leaves; stem-leaves few, entire, sessile and partially clasping: heads 1-7, on long peduncles; rays numerous, linear or spatulate, purplish or pinkish. April to June. 30. CALLISTEPHUS. China 50! >. Erigeron canadensis. Erect, leafy annuals, with large solitary heads bearing numerous 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. hortensis, Cass. Common China aster, now one of the commonest of garden annuals, in many forms: leaves sessile and coarsely toothed. China. 31. ANTENNARIA. Everlasting. Perennial little herbs with cottony leaves and stems: flowers dioecious, in many-flowered small heads, solitary or racemose or clustered (much resembling Gnaphalium, but distinguished by t
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1913
