THAPSIA, the DEADLY CARROT; a genus of the digynia order, belonging to the pentandria class of plants. There are six species; the most remarkable is the sectida, with many pointed lobes, narrowed at their base. It is a native of Italy and Spain. The leaves are cut into many narrow segments, almost as small as those of the garden-carrot, but rough and hairy; their segments are always opposite, and are narrower at their base than at their points. The stalks rise about two feet high, and are terminated by umbels of small yellow flowers, which appear in July: these are succeeded by flat-bordered seeds, which ripen in the beginning of September. The roots of this species were formerly ordered in medicine, but is now entirely disused; a small dose operating with extreme violence both upwards and downwards.