. 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. 3§ ASCLEPIADACEAE. Vol. 3. Vincetoxicum hirsutum (Michx.) Britton. Hairy Vincetoxicum. Fig. 3418. Gonolobus hirsutus Michx. Fl. Bor. Am. 1: 119. 1803. V. hirsutum Britton, Mem. Torr. Club 5 : 266. 1894. Stem downy, slender. Leaves ovate, acuminate at the apex, deeply cordate at the base, downy, 2'-4' long, 1'â2Y wide, the sinus narrow, or the lobes somet
. 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. 3§ ASCLEPIADACEAE. Vol. 3. Vincetoxicum hirsutum (Michx.) Britton. Hairy Vincetoxicum. Fig. 3418. Gonolobus hirsutus Michx. Fl. Bor. Am. 1: 119. 1803. V. hirsutum Britton, Mem. Torr. Club 5 : 266. 1894. Stem downy, slender. Leaves ovate, acuminate at the apex, deeply cordate at the base, downy, 2'-4' long, 1'â2Y wide, the sinus narrow, or the lobes sometimes overlapping; petioles slender, pubescent, Â¥-2' long; peduncles usually about equalling the petioles, sometimes longer; umbels few-several- flowered; corolla brown-purple to greenish yellow, ovoid in the bud, its segments oblong, very obtuse, 2"-4r" long, minutely puberulent without, about 4 times as long as,the densely pubescent calyx; crown cup-shaped, fleshy, about as high as the anthers, the margin 10-crenate; follicles â lanceolate, 3'-s' long, muricate, puberulent; seeds entire. In thickets, Maryland to Florida, west to Tennessee. Running milkweed. Negro-vine. July-Aug. 4. Vincetoxicum obliquum (Jacq.) Britton Fig. 3419. Cynanchum hirtufn L. Sp. PI. 212. 1753? Cynanchum obliquum Jacq. Coll. I : 148. 1786. G. obliquus R. Br.; R. & S. Syst. 6 : 64. 1820. V. obliquum Britton, Mem. Torr. Club 5: 266. 1894. Stem puberulent or hirsute, slender. Leaves pubescent, broadly ovate, short-acuminate at the apex, deeply cordate at the base with an open or closed sinus, 2'-8' long, iJ'-6' wide; petioles rather stout, pubescent, i'-4' long; umbels slen- der-peduncled, few-several-flowered; pedicels very slender, i'-2' long; corolla narrowly conic in the bud, red-purple within, greenish and minutely pubescent without, its segments elongated-linear, obtuse, 6-7 times as long as the hirsute calyx; crown cup-shaped, as high as the anthers, fleshy, its margin 10-crenu
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
