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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1830 Excerpt:...much griping. This last circumstance respecting the inconstancy of colour in the convolvulus, is corroborated by the account given of jalap by Woodville, who says, " the colour will no doubt vary. The plant at Kew produced reddish flowers, but the plants obtained by Houston from the Spanish West Indies, had flowers externally of a reddish colour but of a dark purple within. It appears, then, that from the observation of Mr. Pursh, on the living plant, there is no doubt left of the identity of convolvulus jalapa and. ipomaa macrorhiza; and it further appears that as Professor Barton was of opinion that the plant described by Bernard Romans as growing wild near Pensacola, in West Florida, was really the ipomcea macrorhiza of Michaux, we have in addition to the facts adduced by Persoon, Desfontaines and others, the authority of the American Professor to assert that the genuine jalap of the Materia Medica, is a plant indigenous to West Florida and Georgia. Truly yours, WILLIAM P. C. BARTON. For the following communication, I am indebted to Mr. Nuttall, whose botanical knowledge must render every thing interesting which he attempts to elucidate on the subject of Jalap. A translation of this paper may be seen in the 21st volume of the Medical and Physical Journal, p. 392. Ed. " AH the synonymes of this drug from Bryonia Mechoacana Hioiucaks of Caspar Bauhin's Pinax. p. 298, and Prodromus, p. 135, to that of Aiton, agree pretty nearly with each other, and do not very materially differ from the specific character given by Linnxus in his Mantina, p. 43. Convolvulus foliis difformibus, cordatu angtilatis oblongis lanceolatisoue, caule volubili, pedunculis uniJloris; but are by no means referable to the Ipomoza macrorhiza of Michaux, considered by Desfontain...