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| | Classics - Culbreth - Materia Medica and Pharmacology - P |
 | | Powder, dark green-, greenish-brown -- epidermal cells 5-6 sided, stomata usually with 4 neighboring cells, fragments of fibro-vascular bundles showing tracheae, wood-fibers, bast-fibers, rosette aggregates of calcium oxalate, oil-secretion reservoirs with oil globules, non-glandular hairs; solvents: diluted alcohol; boiling water partially. |
 | | Powder, greenish-yellow -- non-glandular hairs, epidermal cells with stomata, secretion cells; solvents: alcohol (50-75 p.c.), boiling water; contains volatile oil 2-3 p.c., artanthic acid, pungent resin, bitter principle, tannin, mucilage--maticin is only a potassium salt. |
 | | Powder, brownish -- thick-walled hairs, tracheae, stomata, epidermal cells with wavy vertical walls, calcium oxalate crystals and starch grains few or absent; contains anemonin (activity -- volatile, causing drug to be inert after 1 year), acrid anemone camphor, volatile oil, iso-anemonic acid, C |
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