connected with natural objects.
1. Birds, Beasts, and Fishes.
The Ass: Cross on the back. (See Ass.)
The Crossbill has nothing to do with the Christian cross; the bird is so called, because its mandibles cross each other.
2. The Vegetable World.
The Arum, Aspen, Calvary-clover, Cedar (see also Cross), Dwarf-elder, Judas-tree, Passion-flower, Purple Orchis, Red Anemone, Rood Selken, Spotted Persicaria, Thistle.
(See these articles, and Flowers With Traditions Of Christ.)
3. The Number Thirteen. (See Thirteen.)
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894