. 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 108. THISTLE FAMILY. 559 7. Centaurea americana Nutt. American Star Thistle. Fig. 4662. C. americana Nutt. Journ. Phila. Acad. 2: 117. 1821. Plectocephalus americanus Don, in Sweet, Brit. Fl. Gard. (II) pi. 51. 1831. Annual, roughish; stem stout, simple, or little branched, 2°-6° high. Leaves entire or denticu- late, the lower and basal ones spatulate or
. 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 108. THISTLE FAMILY. 559 7. Centaurea americana Nutt. American Star Thistle. Fig. 4662. C. americana Nutt. Journ. Phila. Acad. 2: 117. 1821. Plectocephalus americanus Don, in Sweet, Brit. Fl. Gard. (II) pi. 51. 1831. Annual, roughish; stem stout, simple, or little branched, 2°-6° high. Leaves entire or denticu- late, the lower and basal ones spatulate or oblong, 2'-s' long, narrowed into petioles, the upper ob- long-lanceolate, sessile, mucronate; heads solitary at the much thickened ends of the leafy stem or branches, very showy, 2'-4' broad; involucre nearly hemispheric, its bracts ovate or lanceolate with conspicuously pectinate appendages; flowers pink or purple, the marginal ones with enlarged and radiant corolla-limbs; achenes somewhat compressed, obliquely attached at the base; pap- pus of copious unequal bristles longer than the achene. Dry plains, Missouri and Arkansas to Louisiana, Mexico and Arizona. 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
