Again, tree-spirits make the crops to grow. Amongst the Mundaris every village has its sacred grove, and “the grove deities are held responsible for the crops, and are especially honoured at all the great agricultural festivals.”(253) The negroes of the Gold Coast are in the habit of sacrificing at the foot of certain tall trees, and they think that if one of these trees were felled, all the fruits of the earth would perish.(254) Swedish peasants stick a leafy branch in each furrow of their corn-fields, believing that this will ensure an abundant crop.(255) The same idea comes out in the German and French custom of the Harvest-May. This is a large branch or a whole tree, which is decked with ears of corn, brought home on the last waggon from the harvest-field, and fastened on the roof of the farmhouse or of the barn, where it remains for a year. Mannhardt has proved that this branch or tree embodies the tree-spirit conceived as the spirit of vegetation in general, whose vivifying and fructifying influence is thus brought to bear upon the corn in particular. Hence in Swabia the Harvest-May is fastened amongst the last stalks of corn left standing on the field; in other places it is planted on the cornfield and the last sheaf cut is fastened to its trunk.(256) The Harvest-May of Germany has its counterpart in the _eiresione_ of ancient Greece.(257) The _eiresione_ was a branch of olive or laurel, bound about with ribbons and hung with a variety of fruits. This branch was carried in procession at a harvest festival and was fastened over the door of the house, where it remained for a year. The object of preserving the Harvest-May or the _eiresione_ for a year is that the life-giving virtue of the bough may foster the growth of the crops throughout the year. By the end of the year the virtue of the bough is supposed to be exhausted and it is replaced by a new one. Following a similar train of thought some of the Dyaks of Sarawak are careful at the rice harvest to take up the roots of a certain bulbous plant, which bears a beautiful crown of white and fragrant flowers. These roots are preserved with the rice in the granary and are planted again with the seed-rice in the following season; for the Dyaks say that the rice will not grow unless a plant of this sort be in the field.(258)