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 . this root is unknown, althoughit is probably somewhat related to true Manaca. Tabacum.—Folia Nicotianae, Leaf Tobacco.—The dried leavesof the Virginia Tobacco plant, Nicotiana Tabacum (Fam. Solanaceae),a tall annual herb indigenous to tropical America and widely culti-vated. The stem is simple, giving rise to large, pubescent, ovate,entire, decurrent leaves, the veins of which are prominent and moreor less ha
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 . this root is unknown, althoughit is probably somewhat related to true Manaca. Tabacum.—Folia Nicotianae, Leaf Tobacco.—The dried leavesof the Virginia Tobacco plant, Nicotiana Tabacum (Fam. Solanaceae),a tall annual herb indigenous to tropical America and widely culti-vated. The stem is simple, giving rise to large, pubescent, ovate,entire, decurrent leaves, the veins of which are prominent and moreor less hairy. The flowers are long, tubular, pink or reddish andoccur in terminal spreading cymes. The various forms of tobaccoare made from the leaves, which are hung in barns, whereby theyundergo a slow drying or process of curing. Other species of Nico-tiana are also cultivated, as N. persica, which yields Persian tobacco;and N. rustica, the source of Turkish tobacco. Inner Structure.—See Winton and Moeller, The Microscopyof Vegetable Foods. Powder.—Greenish-brown; non-glandular hairs, 3 to 6-celled,with a broad basal cell and not infrequently branching apical cells; MANACA 615. Fig. 269.—Manaca: A, transverse section of root: K, thin-walled cork whicharises in the epidermal layer; Ct, cortex consisting mostly of starch-bearingparenchyma, and cells containing either rosette aggregates of calcium oxalateor a yellowish-brown amorphous content; the larger cells of which aremostly spheroidal in shape and usually lined with a thin layer of protoplasm;L, small strands of leptome; W, wood fibers; M, medullary rays consistingmostly of rectangular cells, having thick, porous walls; An, cells markingthe rings of growth between the spring and fall wood as also of the cambium,usually filled with a yellowish-brown, amorphous substance; St, stone cells,usually developed between the wood fibers and medullary rays. B, longi-tudinal section showing tracheae having bordered pores (Tb); paren
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1920
