Clematis tosaensis, a deciduous climbing shrub with light
purple-brown stems, inhabits forests or forest edges, having
opposite, ternate compound leaves. Leaflets are oval to oval-lanceolate,
2-9cm long, 0.8-5cm wide, with sharp tips and cuneate to roundish
bases with 1.5-10cm-long petioles, and with coarse serrations on
margins. Flowers singly emerge from axils, bell-shaped, 1.5-3cm in
diameter, open facing downward. The flowers lack petals; sepals are
4 in number, oblong, 2-3cm long, 0.4-1.2cm wide, yellow-white, with
adpressed hairs on margins, tips, sharp or round, bend backward.
Bloom time: April-May.