Spirodela polyrhiza
| Scientific Name: | Spirodela polyrhiza |
| Synonym: | |
| Family: | Lemnaceae |
| Common Name: | Greater Duckweed |
| Authority: | Linnaeus, Schleid |
| Etymology: | |
| C Value: | 5 |
| Wetness: | OBL |
| # of Species in Genus in Illinois: | 2 |
| Duration: | Annual |
| Reproduction: | Monoecious |
| Flower Type: | Perfect |
| Flower Shape: | |
| Flower # of Parts: | |
| Flower Color: | Green, White |
| Growth Habit: | Forb |
| Leaf Arrangement: | Alternate |
| Leaf Type: | Simple |
| Leaf Shape: | |
| Leaf Shape Term: | |
| Leaf Margin: | Entire |
| Leaf Toothing: | Entire |
| Stem Surface: | |
| Trunk/Bark: | |
| Armature: | |
| Twig Characteristics: | |
| Habitat: | |
| Distribution: | BONAP Distribution Map |
| Status (State): | |
| Status (Federal): | |
| ID Tips: | Appears similar to Lemna, but has more than one rootlet |
| Gee Whiz: | |
| Humor: | |
| More Info: | Illinois Wildflowers Search |