. 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. 2. Thlaspi perfoliatum L. Perfoliate Penny-cress. Fig. 2046. Thlaspi perfoliatum L. Sp. PI. 646. 1753. Annual, glabrous, branched at the base, stems commonly simple, slender, ascending or erect, i'-y' tall. Basal leaves ovate or suborbicular, often petioled; stem-leaves oblong or oblong- lanceolate, sessile, auricled at the base and clasping the stem, i'-i' lon
. 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. 2. Thlaspi perfoliatum L. Perfoliate Penny-cress. Fig. 2046. Thlaspi perfoliatum L. Sp. PI. 646. 1753. Annual, glabrous, branched at the base, stems commonly simple, slender, ascending or erect, i'-y' tall. Basal leaves ovate or suborbicular, often petioled; stem-leaves oblong or oblong- lanceolate, sessile, auricled at the base and clasping the stem, i'-i' long, 3"-6" wide, obtuse or acute at the apex; pedicels filiform, spreading; silicic obovate-orbicular, 2"-3" broad, rather narrowly wmged, broadly notched at the summit; style short but mani- fest; seeds usually 4 in each cell. Hamilton, Ontario, and Geneva, New York. Advcntive from Europe. May-Aug. 20. MYAGRUM L. Sp. PI. 640. 1753. An annual glabrous glaucous branching herb, with entire or undulate oblong to lanceolate leaves, the lower petioled, the upper sessile and deeply auricled at the base. Flowers small, yellow, in elongating racemes; pedicels short, erect-ascending, bractless. Sepals nearly erect. Petals short; longer stamens somewhat connate in pairs Silicle obcuneate to spatulate, flattened, indehiscent, falsely 3-celled, i-seeded, tipped by the short style. Seed pendulous; cotyledons incumbent. [Greek, a fly-trap.] A monotypic genus of Europe and western Asia. I. Myagrum perfoliatum L. Myagrum. Fig. 2047. Myagrum perfoliatum L. Sp. PI. 640. 1753. Lower leaves oblong, narrowed into petioles; upper leaves 2'-^' long, i'-i' wide, obtuse or acutish at the apex, the basal auricles mostly rounded; racemes, in fruit, elongating to several inches in length; pedicels I "-2" long, 2-3 times shorter than the pods, equalling or a little longer than the calyx; longer stamens about equalling the petals. In waste places about Quebec. Fugitive or adventi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
