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Electronic Flora of South Australia species Fact Sheet

Family: Onagraceae
Oenothera glazioviana

Citation: M. Micheli in C. Martius, Fl. Bras. 13,2:178 (1875).

Synonymy: O. erythrosepala Borbás, Magyar Bot. Lapok. 2:245 (1903).

Common name: None

Description:
Biennial herbs with 1 to several branches, to 1.2 m high, from a basal rosette, covered with spreading short and longer hairs with the latter producing a broad red base on the stems below and on the lower parts of the inflorescence; basal leaves with petioles to 10 cm long, with lamina oblanceolate to linear-elliptic, 9-20 x 2.5-6 cm, obtuse or rounded, with a long cuneate base, covered with short hairs and longer ones mainly along the veins; cauline leaves with petioles 0-1 cm long, with the lamina lanceolate to narrow-elliptic, 2-9 x 0.5-3 cm, with a cuneate base, acute, with margin crisped to undulate.

Inflorescence with sessile flowers borne singly in the axils of leaf-like bracts which are often much shorter than the leaves and with a truncate base; floral tube 2.5-4 cm long, cylindrical and gradually broadened below the calyx; sepals lanceolate, 20-30 mm long incompletely separating and bent to one side; covered with glandular and non-glandular hairs outside; petals broadly obovate, 35-45 mm long, truncate and usually emarginate, usually bright-yellow; stamens with filaments scarcely broadened towards the base; anthers dorsifixed and versatile, 12-14 mm long; ovary inferior, more or less cylindrical; stigma with slender lobes 5-7 mm long.

capsule loculicidal, narrow-ovoid, dehiscing mainly at the apex; seeds more or less wedge-shaped, distinctly angular.

Published illustration: Ross-Craig (1958) Drawings Brit. Pl. 11:t. 3.

Distribution:  probably of garden origin now widely naturalised on all continents.

S.Aust.: NL, MU, SL, KI, SE.   N.S.W.; Vic.

Conservation status: naturalised

Flowering time: mainly Aug. — March.


SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia

Biology: No text

Taxonomic notes: It is distinguished by its red-based hairs and flower size from the very similar species O. biennis which was recorded by J. Black (1952) but no specimens could be found to confirm its occurrence in S.Aust. O. glazioviana is probably a garden hybrid between O. grandiflora L'Hér. and O. elata Kunth (Raven et al. (1979) Syst. Bot. 4:248).

Author: Not yet available


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