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]
Catalogue details

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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    A N JEXPERIMENTAL DISSERTATION,^. ...<►....«v..~.«>....«V~4>—.«>-..«..<-<V~~«>—<V—•<►-• ^Description of the Rhus VERNiXi radicans and gLabrum. TH E plants which are the objeft of the iuc- ceeding experiments and reflexions, belong to a numerous and extenfive family of vegetables. Dif- ferent fpecies of the genus Rhus are found in every quarter of the globe, and inhabit almoft every cli- mate.* Seven fpecies of this genus have been dis- covered in Pennfylvania : the Rhus typhinum, R. co- pallinum, R. glabrum, R. canadenfe, R, vernix, R. toxicodendron andR. radicans f The three laft fpecies are moft numerous in the fouthern parts of the United States : the more tem- perate climate of the northern ftates appears beft adapted to the four fpecies firft enumerated. Three other fpecies of Rhus are found in the fouth- ern regions of North-America : the Rhus elegans^ aromaticum, and fuaveolens. * Thirty-two fpecies are enumerated in the laft edition of the Syftema Vegitabilium Linnsei, publilhed by Gmelin. t Clayton, in his Flora Virginiana, publilhed 1762, defcribM feven fpecies. A