View source for Poterium

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{{Inc|
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Poterium (Greek for drinking cup; because the foliage of one species was used in the preparation of a medicinal drink). Rosaceae. Linnaeus placed certain rosaceous plants in the genera Poterium and Sanguisorba, the latter having 
precedence of publication. Many subsequent authors have united these genera. Focke, however (Engler & Prantl, Die Naturlichen Pflanzenfamilien), re-defines the genus Poterium to include one species, the P. spinosum of S. Eu., allowing the other species to remain in Sanguisorba. As thus understood, Poterium is monoecious, the lower fls. in the spike staminate, the upper pistillate, the stamens many and hanging, the styles 2, the fr. somewhat fleshy, colored, and inclosed in the calyx, the lvs. pinnate. These plants are known as burnet, although the name applies more correctly to Sanguisorba alone. P. spinosum, Linn., is a small spiny shrub with nearly glabrous serrate lfts., somewhat downy branches, small greenish fls. in oblong spikes and reddish berry-like fr. It is offered in S. Calif. Grows 3 ft., the branchlets ending in spines. Said to be a very interesting ornamental undershrub. Recently P. obtusum, Franch. & Sav. (P. obtusatum, Hort. Sanguisorba obtusa, Maxim.), has been offered abroad : it is from Japan, said to be the finest of the burnets yet introduced: 3 ft. : lvs. long, pinnate, lfts. about 6 pairs, oblong, rounded at end, serrate, petioluled: fl.-sts. much branched, the crimson spikes about 3 in. long and 1 in. diam. Summer. G.G. III. 59:2. For P. canadense and P. Sanguisorba, see Sanguisorba. 
										L. H. B.
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==Cultivation==
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===Propagation===
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===Pests and diseases===
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==Species==
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==Gallery==
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==References==
*[[Standard Cyclopedia of Horticulture]], by L. H. Bailey, MacMillan Co., 1963
<!--- xxxxx  *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381  -->
<!--- xxxxx  *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432  -->
<!--- xxxxx  *Sunset National Garden Book. Sunset Books, Inc., 1997. ISBN 0376038608  -->

==External links==
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