. 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. Genus 104. THISTLE FAMILY Yellow 13. Cirsium horridulum Michx. Fig., 4648. Carduus spinosissimus Walt. Fl. Car. 194. 1788. Not Cir- sium spinosissimum (L.) Scop. Cirsium horridulum Michx. Fl. Bor. Am. 2: 90. 1803. Cnicus horridulus Pursh, Fl. Am. Sept. 507. 1814. Biennial or perennial, somewhat woolly when young, but becoming glabrate; stem branched,
. 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. Genus 104. THISTLE FAMILY Yellow 13. Cirsium horridulum Michx. Fig., 4648. Carduus spinosissimus Walt. Fl. Car. 194. 1788. Not Cir- sium spinosissimum (L.) Scop. Cirsium horridulum Michx. Fl. Bor. Am. 2: 90. 1803. Cnicus 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 in outline, 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 upper leaves, 2'-4' broad, i4'-2i' high; bracts of the involucre narrowly ianceolate, 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-meadows in New York and New Jersey. May-Aug., or earlier in the South. 14. Cirsium muticum Michx. Swamp Thistle. Fig. 4649. Cirsium muticum Michx. Fl. Bor. Am. 2: 89. 1803. Carduus muticus Pers. Syn. 2: 386. 1807. Cnicus muticus Pursh, Fl. Am. Sept. 506. 1814. Carduus muticus subpinnatifidus Britton, in Britt. & Brown, 111. Fl. 3 : 489. 1898. Cnicus muticus alpicola Fernald, Ott. Nat. 1905: 166. Biennial; stem woolly or villous when young, becoming glabrate, slender, striate, leafy, panicu- lately branched above, 3°-8° high. Leaves dense- ly white-tomentose beneath when young, some- times becoming glabrous on both sides, deeply pinnatifid into lanceolate or oblong, entire, lobed or dentate, spiny segments usually tipped with slender prickles, or sometimes merely lobed; basal leaves petioled, 4-8'
Size: 1320px × 1894px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
