LARGE-FLOWERED EVENING-PRIMROSE

Oenothera glazioviana

Willowherb Family [Onagraceae]

month8jun month8june month8jul month8july month8aug month8sep month8sept

status
statusZneophyte
 
flower
flower8yellow
 
morph
morph8actino
 
petals
petalsZ4
 
type
typeZspiked
 
stem
stem8round
 
smell
smell8fragrant
fragrant

19th Aug 2017, dunes, Crosby Coastal Park, Sefton Coast. Photo: © RWD
An exceedingly windy day when no plant would stay still. Nestled in amongst Common Ragwort and other plants it grows to 1.8m high, slightly taller than other tall Evening-primroses.


19th Aug 2017, dunes, Crosby Coastal Park, Sefton Coast. Photo: © RWD
It has long flower-buds which open into large flowers. Petals 3-5cm long, and which are wider than they are long.


19th Aug 2017, dunes, Crosby Coastal Park, Sefton Coast. Photo: © RWD


19th Aug 2017, dunes, Crosby Coastal Park, Sefton Coast. Photo: © RWD
Sepals long and reflexed downwards and often have a pinkish tinge.


19th Aug 2017, dunes, Crosby Coastal Park, Sefton Coast. Photo: © RWD
Large flowers with long flower-buds.


19th Aug 2017, dunes, Crosby Coastal Park, Sefton Coast. Photo: © RWD
The clincher for ID is the long style (top left) thrusting much higher than do the stamens. [Strong wind not helping your photographer - he tried to take this photo about 9 times, and this is the best shot he got].


19th Aug 2017, dunes, Crosby Coastal Park, Sefton Coast. Photo: © RWD
Long flower-buds which have pinkish stripes on the outside.


19th Aug 2017, dunes, Crosby Coastal Park, Sefton Coast. Photo: © RWD
The lower part of the flower-stem (that which becomes the fruit) has hairs with red bulbous bases (they look blackish here) on the green parts.


19th Aug 2017, dunes, Crosby Coastal Park, Sefton Coast. Photo: © RWD
Hairs with red bulbous-bases on the green parts of the developing fruits.


19th Aug 2017, dunes, Crosby Coastal Park, Sefton Coast. Photo: © RWD
This specimen has more noticeably pink and long flower-buds.


19th Aug 2017, dunes, Crosby Coastal Park, Sefton Coast. Photo: © RWD
Leaves crinkly and warped.


19th Aug 2017, dunes, Crosby Coastal Park, Sefton Coast. Photo: © RWD
Leaves crinkly and warped.


Easily confused with : other Evening-primroses (Oenothera) species.

Not to be semantically confused with : Fragrant Agrimony (Agrimonia procera), Fragrant-Orchid (Gymnadenia conopsea) [plants with similar names belonging to differing families]

Hybridizes in a (unique to the UK) way with : Evening-primrose (Small-flowered) (Oenothera cambrica), Evening-primrose (Intermediate) (Oenothera x fallax), Evening-Primrose (Common) (Oenothera biennis) and with any of their hybrids or itself to produce a 'hybrid swarm', whenever two (or more) of those are in proximity. Many of these hybrids have no common nor botanical name. See  Hybrid Swarms.

The identifying features to look out for in this species, Oenothera glazioviana are:

  • Flower stalk: red towards top
  • Flower buds: Long with pink stripes
  • Flower size: Large Petals 3-5cm long, wider than they are long.
  • Stigma versus Stamen length: Style much longer
  • Leaves: Crinkly and warped
  • Fruits: hairs with red bulbous bases on the green parts
  • Stem: hairs with red bulbous bases on the green parts

This Evening-primrose not only grows near the coast on sand dunes, but also on waysides and waste ground especially any near the sea.

Because the style of Large-evening Primrose is held aloft above the anthers it is less likely to in-breed and more likely to outbreed, taking part in hybrid-swarm orgies. It is the commonest species both in the wild and in gardens and is particularly abundant on the Sefton Coast where it partakes in the hybrid swarm. This species is not closely0 matched in North American populations so there may be a possibility that this species evolved in Europe by both mutation and by hybridisation and therefore was not introduced from North America. It may also be a similar case with some of the distinctive 'segregates' of Common Evening-Primrose (Oenothera biennis) which were once recognised as a separate species: Welsh Evening-primrose (Oenothera cambrica) which differs from Common Evening-Primrose in having longer petals and fruit capsules and in the lower capsules lacking glandular hairs.


  Oenothera glazioviana  ⇐ Global Aspect ⇒ Onagraceae  

Distribution
 family8Willowherb family8Onagraceae

 BSBI maps
genus8Oenothera
Oenothera
(Evening-Primroses)

LARGE-FLOWERED EVENING-PRIMROSE

Oenothera glazioviana

Willowherb Family [Onagraceae]