Clematis tashiroi Maxim.

Vines woody. Branches shallowly 8--15-grooved, glabrous. Leaves pinnate, 5-foliolate, or ternate, glabrous; petiole 3.5--9.4 cm, base strongly dilated and connate to basally widened part of opposite petiole; leaflet blades ovate to narrowly so, 3--22 × 1.6--12 cm, papery, base rounded to subcordate, margin entire, apex acute to acuminate; basal veins abaxially ± prominent to nearly flat. Cymes axillary, (1--)3--8-flowered, glabrous; peduncle 1.5--6 cm; bracts petiolate, narrowly ovate to elliptic, 1.8--5.5 cm. Flowers 3--6 cm in diam. Pedicel 5.5--12 cm, glabrous. Sepals 4--6, dark purple, spreading, narrowly oblong, linear, or lanceolate-oblong, 1.8--3 × 0.4--0.8 cm, abaxially brown velutinous, adaxially glabrous, apex acute. Stamens unequal in length, outer ones 1--2.2 cm, inner ones 6--12 mm, glabrous; anthers narrowly oblong to linear, 2--3.5 mm, apex with a 0.5--1 mm apicula. Ovaries pubescent. Style 6--9 mm, densely villous. Achenes narrowly elliptic, 4--5 × 2--2.8 mm, sparsely appressed pubescent; persistent style 4--6 cm, plumose. Fl. Aug--Oct, fr. Oct--Jan.

Taiwan [Japan (Ryukyu Islands), N Vietnam].

Forest margins, slopes, along streams, beaches; below 100--2800 m.

Clematis longisepala Hayata; C. tozanensis Hayata; C. yingtzulinia S. S. Ying.

Clematis tashiroi là một loài thực vật có hoa trong họ Mao lương. Loài này được Maxim. mô tả khoa học đầu tiên năm 1888.

长萼铁线莲（学名：Clematis tashiroi），又名琉球铁线莲、田代氏铁线莲，为毛茛科铁线莲属下的一个种。