Scientific and applied pharmacognosy intended for the use of students in pharmacy, as a hand book for pharmacists, and as a reference book for food and drug analysts and pharmacologists . Crystals at eovto8 2°C, Fig. 58.—Examination of crystals by means of a thermo-stage. (1) Crystals atordinary temperature. (2) Slide heated to 54-56° C. when Coumarin melts,the crystals of vanillin and benzoic acid remain normal. (3) Crystals heatedfrom 80-82° C, at which temperature vanillin melts. 136 SCIENTIFIC AND APPLIED PHARMACOGNOSY to mm. long, and spheroidal starch grains from
Scientific and applied pharmacognosy intended for the use of students in pharmacy, as a hand book for pharmacists, and as a reference book for food and drug analysts and pharmacologists . Crystals at eovto8 2°C, Fig. 58.—Examination of crystals by means of a thermo-stage. (1) Crystals atordinary temperature. (2) Slide heated to 54-56° C. when Coumarin melts,the crystals of vanillin and benzoic acid remain normal. (3) Crystals heatedfrom 80-82° C, at which temperature vanillin melts. 136 SCIENTIFIC AND APPLIED PHARMACOGNOSY to mm. long, and spheroidal starch grains from mm. in diameter. Coumarin (Figs. 58 and 59), is rather widely distributed innature. Of the plants in which it has been found the following maybe mentioned: Vanilla grass or sweet vernal grass (Anthoxanthumodoratum); Carolina vanilla or dogs tongue (Trilisa odoratissima),one of the Composite; the yellow melilot (Melilotus officinalis), aleguminous herb found in waste places in the Eastern United States. Fig. 59.—Coumarin. Type A, tabular crystals obtained by cooling meltedcoumarin to 54°-56° C; type B, aggregates of tubular crystals: type C,needles; type D, short prisms obtained from hot aqueous solutions. and in which it occurs free as well as combined with melilotic acid;other species of Melilotus, as well as in other genera of the Legu-minosse; sweet-scented bed straw (Galium triflorum), an herb ofthe Rubiacese growing in the United States; the rhizome of Vitissessilifolia (VitaceaB) of Brazil, and in Prunus Mahaleb (Fam. Rosa-cea), of Europe. A number of the orchids contain coumarin, and these belongchiefly to the genus Orchis, as Orchis odoratissima, of Europe; O. LADYS SLIPPER 137 coriophora, of Europe and the Orient; 0. Simia, of Europe and theOrient; 0. militaris, of Europe and Asia; Habernaria conopsea, ofEurope and Asia; Aceras anthropophora, of Europe and Arabia. Cypripeditjm. — Ladys Slipper. — The dried rhizome androots of Cypripedium parviflorum (Sma
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1920
