Caltha palustris (Kingcup, Marsh Marigold)
Botanical Information
| Family | Ranunculaceae |
| Genus | Caltha |
| Species | palustris |
| Category | Perennials, Wildflowers & Weeds |
| Pronunciation |
Details
| USDA Hardiness Zone | 3 - 7 |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 1a - 7a |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H7 - H5 |
| RHS Hardiness Ref. | |
| Temperature (°C) | -40 -(-12) |
| Temperature (°F) | -40 - 10 |
| Height | 10 - 50 cm |
| Spread | 10 - 50 cm |
| Growth | Fast |
| Flowering Period | May, June |
Description and Growing Information
| Propagation | By division or seed. |
| Cultivation | Shallow area of a pond, boggy soil in full sunlight to partial shade. |
| Pests | Powdery mildew and rust. |
| Habitat | Marshes, fens, ditches and wet woodland in temperate regions of the Northern Hemisphere. |
| Leaf Description | Rounded, 3–20 cm across, with a bluntly serrated margin and a thick, waxy texture. |
| Flower Description | The flowers are yellow, 2–5 cm diameter, with 4-9 petal-like sepals. |
Photographs
Scanning electron microscope image of pollen grain.