bog arum
noun
1- a plant of the arum family, with heart-shaped leaves, a white spathe, and a green spadix. It grows in swamps and boggy ground in north temperate regions.水芋。亦称CALLA或 WATER CALLA.
1.1
- Calla palustris, family Araceae.拉丁名Calla palustris,天南星科。