. 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. lower petioled, densely white-tomentoseon both sides, or becoming green and glabrateabove; heads numerous, erect, spicate-panicu-late, about 2 broad; involucre tomentose, itsbracts narrowly oblong; receptacle naked;central flowers fertile. In dry rock-y soil, western Nebraska to Minne-sota, Idaho, Oregon and Saskatchewan. Genus 94. THISTLE FAMILY. 529 18. Artemisia
. 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. lower petioled, densely white-tomentoseon both sides, or becoming green and glabrateabove; heads numerous, erect, spicate-panicu-late, about 2 broad; involucre tomentose, itsbracts narrowly oblong; receptacle naked;central flowers fertile. In dry rock-y soil, western Nebraska to Minne-sota, Idaho, Oregon and Saskatchewan. Genus 94. THISTLE FAMILY. 529 18. Artemisia ludoviciana Nutt. Dark-leaved Alugwort. Fig. ludoviciana Nutt. Gen. 2: 143. 1818. Perennial, 2°-4° high; stem woolly, branchedabove. Leaves linear to obovate, 3 long or less,white-woolly beneath, at length dark green andglabrous, or very nearly so above, the base com-monly narrowly cuneate, at least the lower onespinnately lobed or toothed, their lobes lanceolate,acuminate; upper leaves often linear and entire;heads numerous, spicate-paniculate, i-i2 broad;involucre oblong, tomentose; receptacle naked;central flowers fertile. In dry soil, Missouri to Texas, Wyoming, Coloradoand Arizona.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
