Oenothera stricta
Citation:
Ledeb. ex Link, Enum. Hort. bot. Berol. 1:377 (1821).
Synonymy: Not Applicable Common name: Common (or sweet-scented) evening-primrose.
Description:
Biennial herbs with usually few erect branches, 20-80 cm high, from a basal rosette, covered with long fine hairs and shorter glandular ones but often becoming glabrous later; basal leaves linear-elliptic to linear-oblanceolate, 5-20 x 0.4-1.2 cm, usually with a long cuneate base to subpetiolate, acute, with widely spaced serrations or teeth; cauline leaves linear-lanceolate to lanceolate, 3-8 x 0.4-1.5 cm, with cordate to usually minute teeth.
Inflorescence with sessile flowers borne singly in the axils of the leaf-like bracts; floral tube 1.8-2.4 cm long, cylindrical and abruptly broadened below the calyx; sepals lanceolate, 15-19 mm long, incompletely separating and bent to one side, with long non-glandular and shorter glandular hairs, on the outside; petals broadly obovate, 2.6-3 cm long, truncate to emarginate, pale- to bright-yellow fading to wine-red; stamens with filaments somewhat broadened towards the base; anthers dorsifixed and T-shaped, 7-8 mm long; ovary inferior, more or less cylindrical; stigma with 4 slender lobes to 8 mm long.
Capsule loculicidal, obconical, dehiscing mainly at the apex; seeds more or less ellipsoid but slightly flattened above.
Published illustration:
Cunningham et al. (1982) Plants of western New South Wales, p. 534.
Distribution:
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N.S.W.; Vic.
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Conservation status:
naturalised
Flowering time: mainly Aug. — Jan.; with flowers opening in the morning.
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SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia
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Biology:
No text
Taxonomic notes:
It is generally accepted that the first publication as O. striata (see Eichler (1965), Suppl. 243) is a printing error and should read O. stricta. The record of O. biennis from S.Aust. (J. Black, 1952) could not be confirmed nor could it be shown that a specimen of O. stricta had been confused with it.
Author:
Not yet available
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