So called - quod singulis calendis, i. e. mensibus florescat - because it flowers every month. Garden marigold, called also caltha, calendula sativa. chrysanthemum, sponsa solis, single marigold. C. sativa Lin. Sp. Pi. 1304. Nat. order, comfit coldeae; corumbifere of Jussieu.

Of the many sorts of marigolds, this is the only one generally received in medicine. It is so common in our gardens, that a particular description is needless. It is annual, propagates itself by seeds, and flowers from May to the end of autumn.

The leaves have more virtue than the flowers, their expressed juice contains most of their pungent matter: it is thought to be aperient, and to promote the secretions in general. The flowers are a slight cordial.

Calendula Alpina. See Arnica Montana. Lin. Sp. Pi. 1245. β .

Calendula auvensis, the wild marigold, also called caltha arvensis, caltha minima; c. arvensia Lin. Sp. Pi. 1303. These leaves are stinking and bitter, and if burnt in the candle they crackle like nitre.

It is sometimes preferred to the former. Its juice is given from one to four ounces in the jaundice and cachexia; and the leaves are commended as a salad for children affected with scrofulous tumours.

Calendula palustris. Common single marsii marigold. Caltha palustris Lin. Sp. Pi. 784. Also called populago, caltha palustris, pseudo helleborus, ranunculoidcs pratensis. Grows in marshes, and is very acrid. It is so caustic that cattle avoid it, for it excites an inflammation if they chance to swallow it.