. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. one-flower. Fig. 4451. Rudbeckia laciniata L. Sp. PI. 906. 1753. Perennial; stem much branched, glabrous, or nearlyso, 3°-i2° high. Leaves rather thin, minutely pubes-cent on the margins and upper surface, broad, thebasal and lower ones long-petioled, often 1° wide,pinnately 3-7-divided, the segments variously toothedand lobed; stem leaves shorter-petioled, 3-5-partedor divid
. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. one-flower. Fig. 4451. Rudbeckia laciniata L. Sp. PI. 906. 1753. Perennial; stem much branched, glabrous, or nearlyso, 3°-i2° high. Leaves rather thin, minutely pubes-cent on the margins and upper surface, broad, thebasal and lower ones long-petioled, often 1° wide,pinnately 3-7-divided, the segments variously toothedand lobed; stem leaves shorter-petioled, 3-5-partedor divided, the uppermost much smaller, 3-lobed,dentate or entire; heads several or numerous, 22-4broad; rays 6-10, bright yellow, drooping; bracts ofthe involucre unequal; chaff of the receptacle trun-cate and canescent at the apex; disk greenish-yellow,at length oblong and twice as long as thick or longer ;pappus a short crown. In moist thickets, Quebec to Manitoba, Idaho, Colo-rado, Florida and Arizona. Thimble-weed. A double-flowered form in cultivation is called golden-glow. July-Sept. A southern mountain race, lower, often only 1° high,with smaller heads, has been described as Rudbeckialaciniata humilis A. 62. DRACOPIS Cass. Diet. Sci. Nat. 35: 273. :400. 1827. An annual caulescent lierb, with smooth and glaucous foliage, and alternate broad or slightly serrate, i-ribbed, clasping leaves. Heads radiate, showy. Involucre fiat,many-flowered, of few narrow, somewhat foliaceous bracts. Receptacle slender, with earlydeciduous chafTy scales. Ray-flowers few, neutral, the rays yellow or often brownish-purpleat the base. Disk-flowers perfect, fertile, brownish, their corollas 5-lobed. Style-brancheswith small pubescent appendages. Achenes terete or nearly so, not angled, striate andminutely transversely wrinkled. Pappus wanting. [Greek, dragon-like, referring to theappendaged style-branches.] A monotypic genus of the southeastern United States. I. Dracop
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
