Hydrophyllum appendiculatum (Great Waterleaf)
Botanical Information
| Family | Hydrophyllaceae |
| Genus | Hydrophyllum |
| Species | appendiculatum |
| Origin | Native in Indiana. Found from the Southeastern and Midwestern United States north to Ontario. |
Details
| USDA Hardiness Zone | 5a - 7b |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 5a - 7b |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H7 |
| RHS Hardiness Ref. | |
| Temperature (°C) | -29° - -15° |
| Temperature (°F) | -20° - 5° |
Description and Growing Information
| General Description | Biennial herb that grows to 0.6m. |
| Notable Specimens | Point Pelee National Park, Ontario, Canada. |
| Bark/Stem Description | Stem leaves are palmately divided, equally long as wide. |
| Leaf Description | Leaves are arranged in a basal rosette. The leaf is 1½ - 2 times as long as wide. 0.5mm long hairs cover the leaf. |
| Flower Description | Corolla 9-13mm long. 5 lobed to middle, lavender or pale pink in colour. Calyx is 5-lobed near to the base; 5 stamens. Protrudes 1-3mm with 1 pistil. Blooms late April to early July. Arranged in inflorescences with thin hairs. |
Photographs
Hydrophyllum appendiculatum, Form. Point Pelee National Park, May 18, 2024.
Hydrophyllum appendiculatum, Leaf. Point Pelee National Park, May 18, 2024.
Hydrophyllum appendiculatum, Flower. Point Pelee National Park, May 18, 2024.