Of the calyx1827 there are two kinds. One of these resembles arum, and is found growing in ploughed soils; the proper time for gathering it being before it begins to wither. It is employed for the same purposes as arum;1828 and an infusion of the root is taken as a purgative and as an emmenagogue. The stalks, boiled with the leaves and some pulse, are curative of tenesmus.