[ad-erz-tuhng] 
| 1. | a fern of the genus Ophioglossum, having one or sometimes two sterile leaves and a fruiting spike. |
| 2. | any of several American dogtooth violets. |
| 1. | Also called adder's-tongue, trout lily. any of several North American lilies of the genus Erythronium, having nodding flowers and usually mottled leaves. |
| 2. | a related Old World plant, E. dens-canis, having purplish flowers. |
| adder's tongue | |
noun | |
| ferns with fertile spikes shaped like a snake's tongue |