. The Pharmaceutical era. loyed in describingthe apex and base of the lamina, as: Acute, when the ending is that of an acuteangle, as Fig. 43. Obtuse, when the ending is blunt ratherthan acute, as Fig. 44. Acuminate, when an acute ending is pro-longed somewhat, as Fig. 45. Truncate, when the ending appears as ifcut off by a pair of scissors, as Fig. 46. Refuse, Emarginate and Obcordate.—These terms all refer to the degree of notch-ing that an obtuse leaf receives. When butslightly notched it is called Retuse (Fig. 47).When the notch is large or strong it istermed obcordate (Fig. 49). Emarginat
. The Pharmaceutical era. loyed in describingthe apex and base of the lamina, as: Acute, when the ending is that of an acuteangle, as Fig. 43. Obtuse, when the ending is blunt ratherthan acute, as Fig. 44. Acuminate, when an acute ending is pro-longed somewhat, as Fig. 45. Truncate, when the ending appears as ifcut off by a pair of scissors, as Fig. 46. Refuse, Emarginate and Obcordate.—These terms all refer to the degree of notch-ing that an obtuse leaf receives. When butslightly notched it is called Retuse (Fig. 47).When the notch is large or strong it istermed obcordate (Fig. 49). Emarginate(Fig. 48), is between Retuse and Obcordate. Mucronate and Cuspidate.—Sometimes anobtuse leaf possesses at the apex a short or sharp pointwhich appears like the continuation of the midrib. Whenthis is sharp and rigid it is termed Cuspidate (Fig. 50),otherwise it is termed Mucronate (Fig. 51). Maratn of the ico/.—Very few leaves possess an evenoutline. There is generally more or less indentation or K^ ?IS / i I ^rfj^ Plnnatcly —lt we compare thevenation in the leaves of the house geranium (Fig. 41),and chestnut tree (Fig. 42). we observe that the veinsthat are sub-divisions of the primary (central) vein, ormidrib, are arranged in two different forms. In the Fig. 36.—Diagram showing the, position of the successivepairs of opposite leaves ^)n Lyslniachia ciliata. (4) being theuppermost; ) under 4. etc. Fig. 37.—Diagram showing the number of straight verticallines necessary to connect the superimposed leaves witheach other. The figures have the same significance as InFig. 36. with the exception that .5 and 6 are not representedIn Fig. 36. incising of leaves, whence the fullnwing descriptive termshave come into use: Serrate.—When the teeth are sharp and directed for-ward like the teeth of a saw, as Fig. 52. Fig. .3S.—Diagram of the stem of the oak in which aspiral line te drawn ascending the .«tem from 1- and con-necting the successive l
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Keywords: ., bookcentury1800, booksubjectdrugs, booksubjectpharmacy, bookyear1
