. 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. Vol. III. i. Erechtites hieracifdlia (L.) Raf. Fire-weed. Fig. 4605. Senecio hieracifolius L. Sp. PI. 866. 1753. B. prealta Raf. Fl. Ludov. 65. 1817. Erechtites hieracifolia Raf. DC. Prodr. 6: 294. 1837. Annual, glabrous, or somewhat hir- sute ; stem striate, succulent, usually branched, i°-8° high. Leaves thin, lan- ceolate or ovate-lanceolate, de
. 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. Vol. III. i. Erechtites hieracifdlia (L.) Raf. Fire-weed. Fig. 4605. Senecio hieracifolius L. Sp. PI. 866. 1753. B. prealta Raf. Fl. Ludov. 65. 1817. Erechtites hieracifolia Raf. DC. Prodr. 6: 294. 1837. Annual, glabrous, or somewhat hir- sute ; stem striate, succulent, usually branched, i°-8° high. Leaves thin, lan- ceolate or ovate-lanceolate, dentate and often deeply incised, 2-8' long, the upper sessile or auriculate-clasping, mostly acuminate, the lower usually nar- rowed into petioles; heads 6"-lo' long, about 3" in diameter, the involucre con- spicuously swollen at the base before flowering, its bracts numerous, striate, green, with narrow scarious margins; pappus bright white. In woodlands, thickets and waste places, very abundant after fires, Newfoundland to Florida, Ontario, Saskatchewan, Nebraska and Texas. AIbo in Mexico, the West In- dies and South America. Pilewort. July- Sept. 100. MESADENIA Raf. New Fl. N. A. 4: 78. 1836. Tall perennial mostly glabrous herbs, with alternate petioled leaves and numerous, rather small, corymbose, discoid heads of white, yellowish or pinkish flowers, all tubular and perfect. Sap milky (at least in some species). Involucre cylindric or nearly so, its principal bracts 5, in 1 series, equal, usually with a few short outer ones. Receptacle flat, not chaffy, with a fleshy projection in the center. Corollas with somewhat spreading 5-cleft limbs, the lobes usually with a mid-nerve. Style-branches conic or obtuse at the apex. Achenes oblong, glabrous. Pappus of copious white scabrous bristles. [Greek, referring to the central pro- jection of the receptacle.] About 30 species, natives of North and Central America. Besides the following, 4 others occur in the southern and
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
