. 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 17. CHICORY FAMILY 3. Lactucaludoviciana (Xutt.) DC. West-ern Lettuce. Fig. 4070. Sonchus ludovicianus Nutt. Gen. 2: 125. hidoviciana DC. Prodr. 7: 141. ^838. Biennial, glabrous throughout, leafy up to inflor-escence, paniculately branched, 2°(-5° high. Leavesoblong to ovate-oblong, acute or acutish, 2-^ long,auriculate-clasping, spinulose-denticulate, sinu
. 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 17. CHICORY FAMILY 3. Lactucaludoviciana (Xutt.) DC. West-ern Lettuce. Fig. 4070. Sonchus ludovicianus Nutt. Gen. 2: 125. hidoviciana DC. Prodr. 7: 141. ^838. Biennial, glabrous throughout, leafy up to inflor-escence, paniculately branched, 2°(-5° high. Leavesoblong to ovate-oblong, acute or acutish, 2-^ long,auriculate-clasping, spinulose-denticulate, sinuate-lobed, or pinnatifid with spinulose segments ; heads3-5 broad, numerous in an open panicle, theirpeduncles bracteolate ; involucre cylindric or ovoid-cylindric, glabrous. 8-g high, its bracts succes-sively shorter and broader, the lower ones ovate;rays yellow; achenes oval to obovate, flat, aboutthe length of their filiform beak; pappus white. Plains and banks, Iowa, Minnesota and South Da-kota to Kansas
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
