Ranunculus fascicularis |
Ranunculus muricatus |
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spiny-fruit buttercup |
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Habit | Mostly glabrous annual from stout, fibrous roots, the 1-several stems simple below and forked above, 1-4.5 dm. tall, often hollow. | |
Leaves | Basal leaves long-petiolate, the blades reniform to cordate, 1.5-6 cm. long and broad, shallowly divided into 3 lobed segments; cauline leaves similar, short-petiolate. |
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Flowers | Pedicels single-flowered, stout, often recurved, 1-6 cm. long; sepals 5, membranous, spreading to reflexed, 4-7 mm. long; petals 5, yellow, narrowly obovate, 5-8 mm. long; nectary scale oval, about half as broad as the basal portion of the petal, the lateral margins attach half their length; receptacle sub-globose; stamens about 10; pistils usually 5. |
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Fruits | Achenes strongly flattened, the faces with short spines; stylar beak stout, flattened, curved, about 2.5 mm. long. |
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Ranunculus fascicularis |
Ranunculus muricatus |
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Flowering time | April-June | |
Habitat | Ditches and other moist places, often on cultivated land. | |
Distribution | Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington; Washington to California, east across North America in scattered locations.
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Origin | Introduced from Europe | |
Conservation status | Not of concern | |
Sibling taxa | ||
Web links |
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