| Answer | Crossword Clue |
|---|---|
| erinuses | ERINUS, any rock plant of the genus Erinus |
| erinus | any rock plant of the genus Erinus |
| arabis | any plant of the genus Arabis, including the rock cresses |
| hydra | any freshwater polyp, esp. of the genus Hydra, having a cylindrical body, tentacles around the mouth, and usually attached to a rock or plant |
| hydras | any freshwater polyp, esp. of the genus Hydra, having a cylindrical body, tentacles around the mouth, and usually attached to a rock or plant |
| hydrae | any freshwater polyp, esp. of the genus Hydra, having a cylindrical body, tentacles around the mouth, and usually attached to a rock or plant |
