(128) 



2916. Citrullin. — A resinous extract, of indefinite composition, extracted from the 



preceding. 



2917. Colocynthin (C66HS4O23). — The constituent that gives the medicinal property 



to the preceding two. 



2918. Lobelia. Indian tobacco. — The herbage of Lobelia inflata L. (Lobeliaceae — 



Lobelia Family). Native of eastern North America. 



2919. The seeds of the preceding species. 



2920. Lobeline (C18H23NO2). — The poisonous and medicinal alkaloid of the pre- 



ceding. 



2921. European acrid lettuce. Wild lettuce. — The herbage of Lactuca virosa L. 



(Cichoriaceae — Chicory Family). Native of Europe. 



2922. Lactucarium. — The inspissated milky juice of the preceding. 



2923. Lactucin (G1H14O4). — A bitter principle of the preceding. 



THE THISTLE FAMILY {Carduaceae) 



2924. Inula. Elecampane. — The root of Inula Helenium L. Native of Europe 



and widely naturalized. 



2925. Inulin (C6Hio0 6 ). — A sugar-like constituent of the preceding and of many 



related plants. 



2926. Helenin (CuHjoOz). — Another constituent of the same. 



2927. Alantol. Inula camphor. (Q0H16O). — An aromatic constituent of the 



same. 



2928. Wormwood. Absinthium. — The herbage of Artemisia Absinthium L. 



Native of Asia and Europe and widely naturalized. 



2929. The inflorescence of the preceding. 



2930. Absinthiin. (C40H56O8+H2O). — The extremely bitter constituent of the 



preceding. 



2931. Santonica. Levant wormseed. — The unexpanded flower-heads of Artemisia 



pauciflora (Ledeb.) Weber. Native of Turkestan. 



2932. Santoninic acid (G5H20O4). — An acid existing in the preceding. 



2933. Crude santonin. Anhydrous santoninic acid (CisHisOa). — The active 



anthelmintic constituent of the preceding, in its unrefined state. 



2934. Santonic acid. — An acid isomeric with santoninic, and from the same plant. 



2935. Carthamus, natural. (See No. 1320.) 



2936. The same pressed into cakes. 



2937. Carthamin. (See No. 1322.) 



2938. Calendula. (See No. 13 18.) 



2939. Calendulin. (See No. 13 19.) 



2940. Camphor plant. Salt-marsh fleabane. — The herbage of Pluchea camphorata 



(L.)DC. Native of the coastal marshes of the American Atlantic. 



2941. Borneol. Borneo camphor (GoHisO). — A camphor existing in the above 



and some related plants and usually obtained from Dryobalanops, of the 

 family Dipterocarpaceae. 



2942. Arnica root. — The rootstock and roots of Arnica montana L. Native of 



Europe. 



2943. Arnica flowers. — The flower-heads of the same plant. 



2944. Arnicin (C20H30O4). — An amaroid existing in the preceding two. 



