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 . Fig. 296.—A portion of a plot of Chrysanthemum cinerariifolium, the flowers,which somewhat resemble the common white or field daisy, furnish the Dal-matian insect powder.—After Newcomb. the ray florets are reddish-brown or reddish-purple, attaining a lengthof 15 mm., being somewhat plicate, unequally blunt, 3-toothed andhaving 7 veins; disk florets tubular, yellow, the corolla scarcelylonger than the brownish
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 . Fig. 296.—A portion of a plot of Chrysanthemum cinerariifolium, the flowers,which somewhat resemble the common white or field daisy, furnish the Dal-matian insect powder.—After Newcomb. the ray florets are reddish-brown or reddish-purple, attaining a lengthof 15 mm., being somewhat plicate, unequally blunt, 3-toothed andhaving 7 veins; disk florets tubular, yellow, the corolla scarcelylonger than the brownish, 10-striate ovary, the latter having a mem-branous pappus. INSECT FLOWERS 675 Powder.—(Fig. 297.) Dalmatian powder, light yellowish-brown;Persian powder, light brown; fragments of the ovary, corolla andflower stalk contain brownish resin secretion canals, the contentsof which are soluble in hot alcohol, colored yellowish upon the addi-. Fig. 297.—Flores Pyrethri (Insect flowers): sc, stone cells; ep, upper epidermisof a bract; h, h, non-glandular hairs of bracts; ept, papillae on the uppersurface of the ligulate corolla; St, St, loose parenchyma of the ligulate cor-olla; g, a trachea of a bract with annular thickening; S, tooth of a tubularfloret, some of the cells of which contain rosette * aggregates of calciumoxalate; ep, epidermis of the under surface of a ligulate corolla; P, sectionof pappus showing some of the lignified cells, some of which contain mono-clinic prisms as shown at rh; pa, parenchyma of a bract; Fr, somewhatthickened, porous cells of the pericarp of the achenes; D, glandular hairsfound on the wall of the ovary; po, pollen grains; iep, cells of the involucrebetween the bracts.—After Hanausek. tion of a solution of potassium hydroxide, which fades on the additionof an excess of acetic acid. Furthermore, upon the addition of eithersulphuric acid or hydrochloric acid, the contents are colored yel
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1920
