. Plants and their uses; an introduction to botany . Fiu. 170.—Calisaya-troe (Cinchona Calisaya, Madder Family, Rubiacece).A, flowpriiif! braneh, J. B, flowor. C, corolla and stamens. D, , fruit with upper half of wall removed to show the packing of theseeds. F, fruit, cut across. G, seed, enlarged, and cut through theembryo, lengthwise. (Luensscn.)—Tree about 12 m. tall; leaves palegrecu; flowers pink; fruit dry. Native home, Andes of Peru. the blood of malarial patients and are regarded as the causeof the disease. It is highly valued also as a tonic. Its in-tensely bitter taste is a p
. Plants and their uses; an introduction to botany . Fiu. 170.—Calisaya-troe (Cinchona Calisaya, Madder Family, Rubiacece).A, flowpriiif! braneh, J. B, flowor. C, corolla and stamens. D, , fruit with upper half of wall removed to show the packing of theseeds. F, fruit, cut across. G, seed, enlarged, and cut through theembryo, lengthwise. (Luensscn.)—Tree about 12 m. tall; leaves palegrecu; flowers pink; fruit dry. Native home, Andes of Peru. the blood of malarial patients and are regarded as the causeof the disease. It is highly valued also as a tonic. Its in-tensely bitter taste is a property familiar to most persons. Strychnine (,).j), the principal alkaloid obtainedfrom the seeds of the nux vomica tree (Fig. 177), is one of POISONOUS DRUGS 189 the bitterest substances used in medicine. One part ofstrychnine gives a bitter taste to 700,000 parts of is one of the most violent poisons, but in minute doses ishighly vahied as a tonic by physicians. The drug aconite is the dried tuljer of the monkshood ^s. Fig. 177, I.—Nux \oniica (Stri/chnos Xux-vomica, Logania Family. Lo-ganiacew). Flowering branch. (Baillon.)—Tree of moderate height;leaves glossy; flowers greenish or yellow; fruit orange. Native home,India and East Indies. (Fig. 178). This .species and nearl}^ related ones are amongthe of plants. The juice of an East Indianspecies is used by the natives as an arrow-poison which is sopowerful as to kill a tiger Avithin a few minutes after it hasbeen even slightly wounded with one of the poisoned arrows. UK) MEDICINAL AND POISONOUS PLANTS The chief active principle is aconitine (C33H45NO10) which isone of several poisonous alkaloids contained in the , aconite is used as an external application to re-
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
