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 . ing of the plant during June and July,and carefully dried. Description.—Leaves broadly ovate, having petioles about in length; lamina from 5 to 10 cm. in length and 3 to 8 cm. inbreadth; summit acute, base somewhat truncate or heart-shaped; 1 Grattarola, Zeitschr. f. Krystallog., 1892, p. 618. For microphotographsof Asparagin, consult Kraemers Applied and Economic Botany, p. 168. 430 SCIENTIFIC AND APP
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 . ing of the plant during June and July,and carefully dried. Description.—Leaves broadly ovate, having petioles about in length; lamina from 5 to 10 cm. in length and 3 to 8 cm. inbreadth; summit acute, base somewhat truncate or heart-shaped; 1 Grattarola, Zeitschr. f. Krystallog., 1892, p. 618. For microphotographsof Asparagin, consult Kraemers Applied and Economic Botany, p. 168. 430 SCIENTIFIC AND APPLIED PHARMACOGNOSY margin dentate and usually more or less 3-lobed; both surfacesgrayish-green, densely velvety pubescent, the midrib and veins ofthe first order prominent on the lower surface; inodorous; tastemucilaginous. Inner Structure.—See Fig. 188. Powder.—Grayish-green; fragments of non-lignified, stellatehairs, usually occurring in clusters of from two to six, having dis-tinctly porous basal portions and attaining a length of mm.,the walls being about mm. in thickness; occasional multi-cellular glandular hairs with short stalks; calcium oxalate in rosette. Fig. 188.—Althaea Folia; A, transverse section through a vein of the leaf; Ep,epidermal cells on the ventral surface; p, palisade cells; g, tracheae; s, lep-tome; O, rosette aggregates of calcium oxalate; Ed, epidermal cells of thedorsal or lower surface. B, longitudinal section through stellate hair ondorsal surface, and showing the calcium oxalate crystals in the cells , transverse section through one of the principal veins; c, collenchyma; m,mesophyll; G, tracheae; S, leptome.—After Meyer. aggregates from to mm. in diameter; fragments of epi-dermal tissue with stomata, the latter being about mm. inlength; mucilage cells distinguished by their highly refracting con-tents; usually a few pollen grains, spheroidal, covered with spines,and about mm. in diameter.—(
Size: 1932px × 1293px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1920
