Anemone rivularis var. barbulata(Turcz.) B.Fedtsch.
Anemone rivularis var. daliensisX.D.Dong & Lin Yang
Anemone rivularis var. flore-minoreMaxim.
Anemone rivularis var. pilosisepalaW.T.Wang
Anemone saniculifoliaH.Lév.
Anemonidium rivulare(Buch.-Ham. ex DC.) Starod.
Ranunculus moellendorffiiHance
Eriocapitella rivularis, a species of flowering plant in the buttercup family Ranunculaceae, is native to Asia. The specific epithetrivularis means "waterside, of the rivers",[2] which evidently refers to one of its preferred habitats. It is commonly called the riverside windflower.[3] In Chinese, it is called cao yu mei,[4] which means "grass jade plum".[5]
Eriocapitella rivularis is a perennialherbaceous plant with a rhizome-like root structure. It is a clump-forming plant with 3–5 basal leaves, each with a petiole5 to 15cm (2 to 6in) long, occasionally up to 25cm (10in) long. The leaf blades are lobed with three sections. Each leaf, being wider than it is long, has the overall shape of a pentagon. In addition to the basal leaves, there are 1–3 flowering stems, each 20 to 60cm (8 to 24in) long, occasionally up to 120cm (47in) long. A whorl of 3 or 4 leaves (technically bracts) wraps around each stem. The stem leaves are similar in appearance to the basal leaves but somewhat smaller. Multiple (3–5) pubescent flower stalks rise directly from the stem leaves, each stalk being 2 to 12cm (0.8 to 4.7in) long. The single flower at the end of each stalk has 5–10 sepals, but no petals. Each sepal is 6 to 15mm (0.2 to 0.6in) long and 3 to 10mm (0.1 to 0.4in) wide. The petal-like sepals are usually white, tinged with blue on the reverse. There are 30–60 pistils in the center of the flower, surrounded by stamens3 to 5mm (0.1 to 0.2in) long, tipped with steel-blue anthers. The fruits are beaked achenes5–8mm (0.2–0.3in) long, ovoid in shape with hooked styles.[4]
In its native habitat, E.rivularis flowers from May to August. Each flower is approximately 2.5cm (1in) in diameter.[6]
Taxonomy
Illustration made in 1842
Eriocapitella rivularis was described by Maarten J. M. Christenhusz and James W. Byng in 2018.[7] Like other members of genus Eriocapitella, E.rivularis was formerly a member of genus Anemone. The basionymAnemone rivularisBuch.-Ham. ex DC. was described in 1817.[8]
Its preferred habitats include meadows, forest margins, paddy fields, streamsides, and lakesides. It is also found under alpine brush in the Himalayas at elevations up to 4,900 metres (16,100ft).[9]
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