Oenothera affinis Cambess.

Annual, or possibly biennial, taprooted herb. Stems < 50 cm tall, branched, with dense glandular and white eglandular pilose hairs. Rosette lvs densely hairy, soon dying. Cauline lvs with short indistinct petioles; lamina 4–11 × 0.7–1.5 cm, lanceolate or linear-lanceolate, entire or remotely denticulate, densely clothed in short, glandular hairs, and with scattered long white, patent, eglandular hairs; base attenuate; apex mucronate. Fls distant along stem. Floral tube 8–9 cm long, very slender, with hairs as on lvs. Buds lanceolate, erect. Sepals 2–3.5 cm long, white-pilose; apices mucronate, divergent. Petals c. 3 cm long, broad-obovate, yellow. Style exserted by c. 2 cm. Capsule c. 2 cm long, ± clavate, ribbed, with hairs as on lvs. Seeds 1.5–2 mm long, ± ellipsoid.

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

Flowering: Apr.–Jun.