Clematis flammula L.

Deciduous woody climber;  stem terete, weakly ribbed.  Lvs very sparsely hairy, green, 2-pinnate, (5)–8–15 × 3–12 cm;  leaflets quite thick, ovate to lanceolate, cuneate to truncate at base, acute to obtuse;  margin entire or rarely 2–3-lobed;  petiole glabrous, (1)–4–5 cm long.  Fls erect, ☿, in large compound dichasial cymes.  Bracts paired, spathulate to subulate, free, inserted about middle of pedicel.  Sepals 4, valvate, white, glabrous above, hairy beneath especially near margins, oblong, obtuse, 8–12–(14) × 3–4 mm.  Anthers 2.5–4 mm long;  filaments glabrous, linear.  Achenes compressed, hairy, 5–6 mm long;  style 3–4 cm long at fruiting.  

[From:  Webb et al. (1988) Flora of New Zealand. Volume 4.]

Flowering: Jan.–Mar.; Fruiting: May.