. 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. 55' 7. Cirsium plattense (Rydb.) Britton. Prairie Thistle. Fig. 4642. Carduus plattensis Rydberg, Contr. Nat. Herb. 3: 167. pi. 2. 1895. Perennial or biennial, the root thick and deep; stem stout, simple, or little branched, ii°-2l° tall, densely white-felted. Leaves deeply pinnatifid, white-tomentose beneath, green, loosely tomen- to
. 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. 55' 7. Cirsium plattense (Rydb.) Britton. Prairie Thistle. Fig. 4642. Carduus plattensis Rydberg, Contr. Nat. Herb. 3: 167. pi. 2. 1895. Perennial or biennial, the root thick and deep; stem stout, simple, or little branched, ii°-2l° tall, densely white-felted. Leaves deeply pinnatifid, white-tomentose beneath, green, loosely tomen- tose, or glabrate above, the lower 5'-/ long, the lobes lanceolate to oblong, acute, prickly tipped and margined; upper leaves smaller and less di- vided ; heads few, about 2' high and broad; outer bracts of the involucre lanceolate to ovate-lanceo- late, firm, dark, tipped with a short weak spread- ing prickle, the inner linear-lanceolate, unarmed, tipped with a scarious reflexed erose appendage; corolla yellow, its lobes linear; pappus of outer flowers merely barbellate. Sand hills, Nebraska, Colorado and South Dakota. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Britton, Nathaniel Lord, 1859-1934; Brown, Addison, 1830-1913. New York, Scribner
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
