. 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. URTICACEAE. Vol. I. i. Parietaria pennsylvanica Muhl. Pennsyl- vania Pellitory. Fig. 1563. P. pennsylvanica Muhl.; Willd. Sp. PI. 4: 955. 1806. Annual, pubescent, stem weak, simple or spar- ingly branched, ascending or reclining, very slender, 4-15' long. Leaves lanceolate or oblong-lanceolate,' membranous, dotted, acuminate at the apex, nar- rowed at the base,
. 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. URTICACEAE. Vol. I. i. Parietaria pennsylvanica Muhl. Pennsyl- vania Pellitory. Fig. 1563. P. pennsylvanica Muhl.; Willd. Sp. PI. 4: 955. 1806. Annual, pubescent, stem weak, simple or spar- ingly branched, ascending or reclining, very slender, 4-15' long. Leaves lanceolate or oblong-lanceolate,' membranous, dotted, acuminate at the apex, nar- rowed at the base, 3-nerved and with 1-3 pairs of weaker veins above, slender-petioled, 1'-^' long, i'-¥ wide; petioles J'-l' long, almost filiform; flowers glomerate in all except the lowest axils, the clusters shorter than the petioles; bracts of the involucre linear, 2-3 times as long as the flowers; style almost none; achene about i" long. On dry rocks and banks, Maine to Ontario, British Columbia, Nevada, Tennessee and Mexico. June-Aug. Hammerwort. Family 12. LORANTHACEAE D. Don, Prodr. Fl. Nepal. 142. 1825. Mistletoe Family. Parasitic green shrubs or herbs, containing chlorophyll, growing on woody plants and absorbing food from their sap through specialized roots called haus- toria (a few tropical species terrestrial).- Leaves in the following genera oppo- site, in Razoumofskya reduced to opposite scales. Flowers regular, terminal or axillary, clustered or solitary, dioecious or monoecious, and perianth simple, or in some exotic genera perfect, and with perianth of both calyx and corolla. Calyx-tube adnate to the ovary, its limb entire, toothed or lobed. Stamens 2-6; anthers 2-celled or confluently i-celled.' Ovary solitary, erect; style simple or none; stigma terminal, undivided, obtuse. Fruit a berry. Seed solitary, its testa indistinguishable from the endosperm, which is usually copious and fleshy. About 21 genera and 500 species, widely distributed; most abundant in tropical regi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
