. 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 102nd meridian. Botany. 668 PYROLACEAE. Vol. II. as many as the divisions of the corolla, the anthers introrse in the bud, inverted at anthesis, opening by pores or short slits; pollen-grains in 4's. Ovary superior, 4-5-celled; style short or slender, often declined; stigma 5-lobed, or 5-crenate; ovules very numerous, anatropous. Fruit a loculicidally dehiscent capsule. Seeds very numerous,
. 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 102nd meridian. Botany. 668 PYROLACEAE. Vol. II. as many as the divisions of the corolla, the anthers introrse in the bud, inverted at anthesis, opening by pores or short slits; pollen-grains in 4's. Ovary superior, 4-5-celled; style short or slender, often declined; stigma 5-lobed, or 5-crenate; ovules very numerous, anatropous. Fruit a loculicidally dehiscent capsule. Seeds very numerous, minute, the loose cellular coat much larger than the almost undif- ferentiated embryo. Three genera and about 20 species, natives of the northern hemisphere. Flowers racemose ; leaves basal. Flowers solitary, corymbose or umbellate ; leaves opposit Stem leafy at base ; flower solitary ; style long. Stem horizontal; branches erect, leafy ; style very sho I. Pyroia. 2. Moneses. 3. Chimaphila. I. PYROLA [Tourn.] L. Sp. PI. 396. f753- Low glabrous herbs, acaulescent or nearly so, stoloniferous, perennial. Leaves basal, persistent (one northwestern species leafless). Flowers nodding, or in one species ascending, white, yellowish, pink, or purple, racemose, on erect bracted scapes. Calyx s-parted, persistent. Petals 5, concave, sessile, deciduous. Stamens 10, declined, or straight and connivent; fila- ments subulate, glabrous; anthers erect in the bud, emarginate or 2-beaked at the base, mostly reversed at flowering, each sac opening by a basal but apparently apical pore. Ovary 5-ceIled; style straight or declined, filiform, or thickened at the summit; stigma 5-lobed. Disk usually obsolete, rarely present and lo-lobed. Capsule subglobose, 5-lobed, 5-cel]ed, loculicidally 5-valved from the base, the valves cobwebby on the margins when opening, the apex and base intruded. [Latin, diminutive of Pyrus, pear, from the similar leaves.] About 15 species, natives of the northern hemisphere.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
