. 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. 3. Cirsiumhorridulum Michx. Fig. 4648. Carduus spinosissimus Walt. Fl. Car. 194. 1788. Not Cir- sium spinosissiiuitm ( L.) horridnlum Michx. Fl. Bor. Am. 2: 90. horridulus Pursh, Fl. Am. Sept. 507. 1814. Biennial or perennial, somewhat woolly when young,but becoming glabrate; stem branched, leafy, 2°-5°high. Leaves green both sides, lanceolate or oblo
. 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. 3. Cirsiumhorridulum Michx. Fig. 4648. Carduus spinosissimus Walt. Fl. Car. 194. 1788. Not Cir- sium spinosissiiuitm ( L.) horridnlum Michx. Fl. Bor. Am. 2: 90. horridulus Pursh, Fl. Am. Sept. 507. 1814. Biennial or perennial, somewhat woolly when young,but becoming glabrate; stem branched, leafy, 2°-5°high. Leaves green both sides, lanceolate or oblong inoutline, sessile and clasping or the basal ones short-petioled and somewhat spatulate, pinnatifid into trian-gular or broader, spinulose-margined and prickle-tipped,entire or dentate lobes; heads involucrate by the upperleaves, 2-4 broad, ii-2i high; bracts of the involucrenarrowly lanceolate, roughish and ciliate, long-acumi-nate, unarmed; flowers pale yellow, yellowish, or occa-sionally purple. In moist or dry sandy soil, Maine to Pennsylvania, Flor-ida and Texas. Abundant along the edges of salt-meadowsin New York and New Jersey. May-Aug., or earlier in theSouth. Cirsium muticum Fig.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
