. 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. ROSE FAMILY. Sanguisorba canadensis L. American Great Burnet. Fig. 2264. Sanguisorba canadensis L. Sp. PI. 117. i Poterium canadense A. Gray, Man. Ed. 5, 755. 1867. Glabrous or slightly pubescent toward the base, erect, simple, or branched above, i°-6° high, the branches erect. Stipules often foliaceous and dentate; basal leaves long-petioled, sometimes 2° long; leafl
. 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. ROSE FAMILY. Sanguisorba canadensis L. American Great Burnet. Fig. 2264. Sanguisorba canadensis L. Sp. PI. 117. i Poterium canadense A. Gray, Man. Ed. 5, 755. 1867. Glabrous or slightly pubescent toward the base, erect, simple, or branched above, i°-6° high, the branches erect. Stipules often foliaceous and dentate; basal leaves long-petioled, sometimes 2° long; leaflets 7-15, ovate, oblong, or oval, obtuse or acutish, cordate or obtuse at the base, serrate with acute teeth, stalked, 1-3' long; flowers white, perfect, bracteolate at the base, in dense terminal showy spikes i'-6' long; stamens 4; fila- ments , white; achene enclosed in the 4-winged calyx. In swamps and low meadows, Newfoundland to Michigan, south to Georgia. July-Oct. Sanguisorba officinalis native of Europe and Asia, found in fields in Maine and recorded from Minnesota, differs in having purplish flowers with short stamens not longer than the 20. POTERIDIUM Spach", Ann. Sci. Xat. III. 5: 43. 1846. Annual or perennial herbs, with branched stems, stipulate, odd-pinnate leaves, the leaf- lets pinnatifid, and greenish perfect bracted flowers in dense oblong spikes. Calyx-tube urn-shaped, constricted at the mouth, 4-\vinged, its 4 lobes with scarious margins. Stamens 2 or 4; filaments short. Pistil i; style terminal: stigma brush-like; ovule I, suspended. Achene enclosed in the drj' calyx-tube. [Greek, diminutive of Poterium.] Two species, one of northwestern America and the following typical one. Poteridium annuum (Xutt.) Spach. Plains Poteridium. Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfec
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
