| Family | PAPAVERACEAE |
| Genus species | Stylophorum diphyllum (Michx.) Nutt. |
| Bibliography | Gen. N. Amer. Pl. 2: 7 (1818) |
| Native Range | s. Ontario to nc. & e. USA |
| Primary Biome | Temperate |
| Habitat | thickets and woods |
| Description | leaves pinnate, 15-30cm long, segments 5-7, oblong, dentate, pale to yellowish green, hirsute, flowers 3-5cm across, crateriform, solitary or in small umbels |
| Size | 20-30cm |
| Color | rich yellow |
| Bloom | late spring, summer |
| Ca | |
| Type | perennial |
| Cultivation | cold, shady site with a humous, moist soil alpine house, moist, humous soil, shade |
| Propagation | seed in spring, uncovered, germ. 1-3 months, 13-18°C division in early spring; cuttings in late summer |
| Synonyms | Chelidonium diphyllum Michx. Chelidonium petiolatum Spreng. ex Steud. Meconopsis crassifolia Benth. Meconopsis diphylla (Michx.) DC. Meconopsis petiolata DC. Papaver crassifolium (Benth.) Steud. Papaver heterophyllum var. crassifolium (Benth.) Jeps. Stylophorum crassifolium (Benth.) Steud. Stylophorum ohiense Spreng. Stylophorum petiolatum Nutt. |
| Territory | 7 Northern America 72 Eastern Canada (ONT Ontario) 74 North-Central U.S.A. (ILL Illinois, MSO Missouri, WIS Wisconsin) 75 Northeastern U.S.A. (INI Indiana, MIC Michigan, OHI Ohio, PEN Pennsylvania, WVA West Virginia) 78 Southeastern U.S.A. (ALA Alabama, ARK Arkansas, KTY Kentucky, TEN Tennessee, VRG Virginia) |