The elements of materia medica and therapeutics (Volume 2).

  • Jonathan Pereira
Date:
1843
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Licence: Public Domain Mark

Credit: The elements of materia medica and therapeutics (Volume 2). 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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    THE ELEMENTS OF MATERIA MEDIC A. II. ORGANISED KINGDOM. X. STfie Ufflctafile <Sul)-l$tnflTrom. Division 1. Cryptogamia, lAnnaus.—Flowerless Plants. Acotyledones, Jussieu.—Celldlares, De Candolle.—Acrogens, Lindley. Essential Character.—Substance of the plant usually composed of cellular tissue chiefly, either in a spheroidal or elongated state; spiral vessels or ducts only present in the highest orders. Stem either increasing by an extension of its point, or by a regular or irregular de- velopment in all directions from one common point; not increasing perceptibly in thickness or density when once formed. Cuticle generally destitute of stomata. Sexual organs, and conse- quently /lowers, absent. Reproduction taking place either by spores or sporules [spores seu sporula], which are inclosed in cases called thecce [sporangia], or imbedded in the substance of the plants; or else by a mere dissolution of the utricles of cellular tissue; germination occurring at no fixed point, but upon any part of the surl'ace of the spores (Lindley), Fig. 105. Structure of Cryptogamic Plants. a. Longtturtinal section of a stem. b Transverse section of a stem. c. Stem of a moss wnli leaves and theca, or seed- case. d. Leaf of a moss magnified. e. Leafy thallus of a lichen with apothecia.' /. Crustacenua thallus of a lichen with apothecia. g. Funjri of the highest tribe. A, x. Fungi of the lowest rank. k. Conferva magnified. Order I ALG^E, Juss.—THE SEA-WEED TRIBE. Ar.GACE.E, Lindley. Essential Character.—Leafless, flowerless plants, with no distinct axis of vegetation, grow- ing [with vnry lew exceptions] in water, frequently having an animal motion, and consist- ing of simple vesicles lying in mucus, or of articulated filaments, or oflobed fronds, formed