. 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. Genus 4. RAGWEED FAMILY. 345 3. Xanthium echinatum ]\ 4134- 3each Clotbur. X. echinatum Murr. Comm. Goett. 6 : 32, pi. 4. 1783. X. macniatuin Raf. Am. Month. Mag. 344. 1818. X. oviforme Wallr. Beitr. Bot. i : 240. 1842. Stem rough, purplish or purple-blotched, l°-2° firm, scabrous, with scattered short papillosehairs, obtusely toothed and lobed, somewhat
. 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. Genus 4. RAGWEED FAMILY. 345 3. Xanthium echinatum ]\ 4134- 3each Clotbur. X. echinatum Murr. Comm. Goett. 6 : 32, pi. 4. 1783. X. macniatuin Raf. Am. Month. Mag. 344. 1818. X. oviforme Wallr. Beitr. Bot. i : 240. 1842. Stem rough, purplish or purple-blotched, l°-2° firm, scabrous, with scattered short papillosehairs, obtusely toothed and lobed, somewhat resinous-glandular beneath; burs commonly clustered in the axils,ovoid to oval, y-ii long, 4-6 thick, glandular; pricklesvery dense, densely hispid from the base to the middleor beyond, subulate, hooked, the longer about 23 long,and about equalling the stout hispid beaks. Sea, lake and river beaches, occasionally in waste Carolina to Nova Scotia, New York, Minnesota andNorth Dakota. Recorded west to Saskatchewan.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
