The Germans call _Mondveilchen_ (Violet of the Moon), the _Lunaria annua_, the _Leucoion_, also known as the Flower of the Cow, that is to say, of the cow Io, one of the names of the Moon. The old classic legend relates that this daughter of Inachus, because she was beloved by Jupiter, fell under the jealous displeasure of Juno, and was much persecuted by her. Jupiter therefore changed his beautiful mistress into the cow Io, and at his request, Tellus (the Earth) caused a certain herb (_Salutaris_, the herb of Isis) to spring up, in order to provide for the metamorphosed nymph suitable nourishment. In the Vedic writings, the Moon is represented as slaying monsters and serpents, and it is curious to note that the Moonwort (_Lunaria_), Southernwood (_Artemisia_), and Selenite (from _Selene_, a name of the Moon), are all supposed to have the power of repelling serpents. Plutarch, in his work on rivers, tells us that near the river Trachea grew a herb called Selenite, from the foliage of which trickled a frothy liquid with which the herdsmen anointed their feet in the Spring in order to render them impervious to the bites of serpents. This foam, says De Gubernatis, reminds one of the dew which is found in the morning sprinkled over herbs and plants, and which the ancient Greeks regarded as a gift of the nymphs who accompanied the goddess Artemis, or Diana, the lunar deity. Numerous Indian plants are named after the Moon, the principal being the _Cardamine_; the _Cocculus cordifolius_ (the Moon’s Laughter); a species of _Solanum_ called the Flower of the Moon; the _Asclepias acida_, the _Somalatâ_, the plant that produces Soma; Sandal-wood (beloved of the Moon); Camphor (named after the Moon); the _Convolvulus Turpethum_, called the Half-Moon; and many other plants named after Soma, a lunar synonym. In a Hindu poem, the Moon is called the fructifier of vegetation and the guardian of the celestial ambrosia, and it is not surprising therefore to find that in India the mystic Moon-tree, the Soma, the tree which produces the divine and immortalising ambrosia is worshipped as the lunar god. Soma, the moon-god, produces the revivifying dew of the early morn; _Soma_, the Moon-tree, the exhilarating ambrosia. The Moon is cold and humid: it is from her the plants receive their sap, says Prof. De Gubernatis, “and thanks to the Moon that they multiply, and that vegetation prospers. There is nothing very wonderful, therefore, if the movements of the Moon preside in a general way over agricultural operations, and if it exercises a special influence on the health and _accouchements_ of women, who are said to represent Water, the humid element. The Roman goddess Lucina (the Moon) presided over _accouchements_, and had under her care the Dittany and the Mugwort [or Motherwort] (_Artemisia_, from Artemis, the lunar goddess), considered, like the Vedic _Soma_, to be the queen or mother of the herbs.” Thus Macer says of it:--