Book (1965) Page(s) 442.
10. Clematis williamsii A. Gray. C. montana var. williamsii (A. Gray) O. Kuntze; C. montana var. bissetii O. Kuntze - Shirobana-no-hanshōzuru. Scandent, gray-brown pubescent; leaves ternate, the leaflets short-petiolulate, rather thin, often nearly glabrous above, ovate to oblong, 3-8 cm. long, 1-3.5 cm. wide, few-toothed, cuneate to rounded at base, usually 3-fid, the median lobes acuminate; flowers white, cup-shaped or broadly campanulate, 1.5-5 cm. long, nodding, solitary, the peduncles axillary with a pair of minute bracts on lower half; sepals 4, broadly elliptic, membranous, about 2 cm. long, glabrous inside, appressed-pubescent outside; stamens shorter than the sepals, the filaments linear, glabrous, becoming black when dried, the anthers oblong, about 2 mm. long, yellow, the connective also blackened when dried; achenes ovate, about 5 mm. long, pilose; style about 2.5 cm. long, pilose, pale yellowish-brown. - May-June. Honshu (Tokaido Distr. and westw.), Shikoku, Kyushu; rather rare.
Book (1875) Page(s) Vol. I, p. 3.
Clematis L. ....
9. Williamsii A. Gray Pl. Jap. 506. — Miq. Prol. 190.
Hab. in sepibus : Nippon media, circa Simoda (Will. ct Morr.); prope Yokoska (Savatier, n. 9.) Fl. Mart. April.
Japonice. – Tsourighané Kadsoura ; Han sjoo dzourou (Tanaka).
Icon. Jap. – Phonzo Zoufou, vol. 29, fol. 6 verso (fl. albi).
