. American medical botany: being a collection of the native medicinal plants of the United States, containing their botanical history and chemical analysis, and properties and uses in medicine, diet and the arts, with coloured engravings (Volume 3) . lare used as a sort of caustic to destroy gum, called Euphorbium, produced by theEuphorbia oflicinarum, is a strong vesicatory,employed by farriers, and sometimes used toadulterate the plaister of Cantharides. Theblistering power of E. corollata has been statedby Dr. Zollickoffer. This active genus of plantsdeserves a thorough investigat
. American medical botany: being a collection of the native medicinal plants of the United States, containing their botanical history and chemical analysis, and properties and uses in medicine, diet and the arts, with coloured engravings (Volume 3) . lare used as a sort of caustic to destroy gum, called Euphorbium, produced by theEuphorbia oflicinarum, is a strong vesicatory,employed by farriers, and sometimes used toadulterate the plaister of Cantharides. Theblistering power of E. corollata has been statedby Dr. Zollickoffer. This active genus of plantsdeserves a thorough investigation with a view totliis particular property, to determine whetherthey are safe and manageable vesications, orvirulent and uncertain. 128 EUPHORBIA COROLLATA. BOTANICAL REFERENCES* Euphorbia corollata, Linn.—Willd. ii. 916.—Michaux, ii. 210,—Pursh, ii. 607.—Tithymalus ijiarianus, &c.—Plukenet, t. 2. MEDICAL REFERENCES. Clayton, Philosophical transactions abridged, viii. 331.—Zol-lickoffer, Materia Medica. Baltimore, 1819. PLATE LIII. Fig. 1. Euphorbia corollata, the top of a plant ratlier below the common 2. Barren 3. Calyx not fully 4. 5. Fertile flower. //, /.//. ~>^ ■A//,, POLYGALA RUBELLA. Bitter Polygala. PLATE LIV. JLhis plant is interesting from the curiousmanner in which a part of the fruit is produced,by a kind of imperfect flower growing close to,and in some instances under, the surface of theground. It is not the only species of the Polygalawhich has this peculiarity. I have often observedlittle shoots at the root of P. paucifolia, one of themost beautiful of the genus, bearing apterousflowers and subterranean fruit, precisely likethose represented in our plate. The P. polygama,of Walter and Pursh, if, indeed, it is a distinctspecies, has the same remarkable mode of is difficult to imagine what end is attained bynature in this singular arrangement, by which apart of the seeds a
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