An experimental dissertation on the rhus vernix, rhus radicans and rhus glabrum : commonly known in Pennsylvania by the names of poison-ash, poison-vine and common sumach / by Thomas Horsfield, of Bethlehem, Pennsylvania, member of the Medical and Chemical Societies of Philadelphia.

  • Horsfield, Thomas, 1773-1859.
Date:
MDCCXCVIII [1798]
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Licence: Public Domain Mark

Credit: An experimental dissertation on the rhus vernix, rhus radicans and rhus glabrum : commonly known in Pennsylvania by the names of poison-ash, poison-vine and common sumach / by Thomas Horsfield, of Bethlehem, Pennsylvania, member of the Medical and Chemical Societies of Philadelphia. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    female and hermaphrodite flowers on the fame plant.* i. The Rhus Vernix. This tree is diftinguifhed in Pennfylvania by the different names of: Poilbn tree, Poifon wood, Var- nifh tree, Poifon am, Swamp Sumach and white Sumach.-j- The Rhus Vernix is the largeft of all our native fpecies of Rhus j it grows in fome in (lances to the height of twenty-five or thirty feet j its average height, however, may be eftimated at twelve or fifteen feet. It fcldom exceeds five inches in diameter. It delights iipac foil, in low, marfhy places. It is generally found near creeks or rivulets, in dark and fhaded fituations. Two fwamps, which I feveral times vifited, during the courfe of laft fummer, are the mod defert and gloomy places, which are to be found in the vicinity of Philadelphia. They are ac- * Walthcr, from this circumftance, in his Flora Cartll- niana, has placed the whole of this genus in Linnaais's clafs of Polygamia : he defcribes five ipecies. t This is the Toxicodendron foliis alatis, fruftu rhomboide of Dillenius, Hort. Elth. Arbor americana, alatis foliis, fucco lafteo venenato j Pluk«« netii Almageil. Sitz five Sitz-d.sju ; vulgo Urus feu Urus no ki. Arbor vernicifera legitima, folio pinnato juglandis, fruftu ra- cemofo ciceris facie. Kasmpfcri amcen. exotica;, p. 791, *c. vide appendix. Several vfrfefM of the R, Vernix are found in Pennfylvania, A2