. 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 102d meridian. Botany; Botany. COMPOSITAE. Vol. III. 4. Cirsium virginianum (L.) Michx. Vir- ginia Thistle. Fig. 4639. Carduus virginianus L. Sp. PI. 824. 1753. Cirsium virginianum Michx. Fl. Bor. Am. 2 : 90. 1803. Cnicus virginianus Pursh, Fl. Am. Sept. 506. 1814. Biennial; stem slender, naked or scaly above, pubescent or somewhat tomentose, simple or branched, 2°-3i° high. Leaves oblong, o
. 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 102d meridian. Botany; Botany. COMPOSITAE. Vol. III. 4. Cirsium virginianum (L.) Michx. Vir- ginia Thistle. Fig. 4639. Carduus virginianus L. Sp. PI. 824. 1753. Cirsium virginianum Michx. Fl. Bor. Am. 2 : 90. 1803. Cnicus virginianus Pursh, Fl. Am. Sept. 506. 1814. Biennial; stem slender, naked or scaly above, pubescent or somewhat tomentose, simple or branched, 2°-3i° high. Leaves oblong, oblong- lanceolate, or the lowest slightly spatulate, ses- sile, or somewhat clasping, not decurrent, acute or acutish, spinulose-margined, entire, lobed or pinnatifid into triangular-lanceolate lobes, the lower sometimes 8' long and 2' wide, narrowed into margined petioles, all pubescent or glabrate above, and densely white-tomentose beneath; heads long-peduncled, i'-iJ' broad, about 1' high; outer bracts of the involucre not coriaceous, lan- ceolate or ovate-lanceolate, tipped with weak short bristles, the inner ones very narrow and merely acuminate; flowers purple. In dry woods and thickets, Virginia to Kentucky, Ohio, Florida and Texas. April-Sept. 5. Cirsium Pitched (Torr.) T. & G. Pitcher's Thistle. Fig. 4640, Cnicus Pitcheri Torr.; Eaton, Man. Ed. 5, 180. 1829. Cirsium Pitcheri T. & G. Fl. N. A. 2 : 456. 1843. Carduus Pitcheri Porter, Mem. Torr. Club 5 : 345. 1894. Biennial, persistently white-tomentose throughout; stem stout, leafy up to the heads, usually branched, i°-2° high. Leaves sessile, partly clasping or slightly decurrent, pinnately divided into narrowly linear, entire lobed or pinnatifid, acute sparingly prickly seg- ments, 2"-3" wide, with revolute margins; basal leaves often 12' long; heads solitary or several and racemose-spicate at the ends of the branches, about l¥ broad; outer bracts of the involucre ovate-lan- ceolate, sparingly pu
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
