Blue fan flower
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Blue fan flower ( Scaevola aemula ) |
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The blue fan flower ( Scaevola aemula ) is a species of fan flower ( Scaevola ) in the family of the Goodeniaceae .
features
The blue fan flower is an evergreen , perennial herbaceous plant that reaches heights of 15 (rarely up to 50) centimeters. The stem is erect or lying-ascending and branched. No roots are formed at the nodes . Stems and leaves are covered with thick, pressed, yellowish hairs to almost bare. The leaves are not succulent, obovate to spatulate and hairy. The lower leaves are 1 to 9 inches long and 0.4 to 3 inches wide. At the base they narrow into the stem. The upper leaves are oblanceolate, about 1 centimeter long, sessile and serrate to entire. The leaf margins are serrated.
Numerous flowers stand together in terminal, up to 25 centimeters long, annual inflorescences . The foliage-like bracts have a length of 4.5 to 7 mm. The zygomorphic flowers are hermaphroditic and five-fold. The five sepals are fused, 0.5 millimeters long, broadly triangular and hairy. The five petals are fused at the base. The blue or deep blue-violet, rarely white to pale blue crown measures 10 to 25 (rarely up to 30) millimeters in diameter. The corolla tube is slit to the base and hairy on the outside. The five sections are fan-shaped to one side, bearded inside at the base and hairy outside in the middle. There is only one circle with five free stamens . Two carpels have become an ovary grown. The stylus is located below the ciliated scar cup , together with a group of stiff hairs as long as the scar cup.
The flowering period in the northern hemisphere usually extends from May to October, rarely does it begin as early as April, in the home regions it is from August to March. It is a day-neutral plant, so it is neither a short- day nor a long-day plant .
The egg-shaped stone fruit is up to 4.5 mm long and hairy.
Occurrence
The blue fan flower occurs in southeast Australia and Tasmania on open, dry sandy and loamy soils in dry bush and on sandy coastal areas.
use
The blue fan flower is used individually as an ornamental z. B. used in traffic lights and window boxes. It has probably been in culture since the end of the 20th century. There are several varieties, for example Blue Wonder with blue-violet flowers and emerald green leaves or Brilliant with blue flowers.
Systematics
It was first described in 1810 by Robert Brown . The Latin name refers to Gaius Mucius Scaevola , a figure from early Roman history who, according to legend, put his right hand into the fire to demonstrate that pain would not make him a traitor. From then on he was called Scaevola ( left-hand ). The blue fan flower got this name because of its zygomorphic flowers. The name Scaevola saligna G.Forst is sometimes used for this species . is only a noun nudum , as it was mentioned by G. Forster in 1786 from New Caledonia without a description and therefore cannot be used.
swell
literature
- Eckehart J. Jäger, Friedrich Ebel, Peter Hanelt, Gerd K. Müller (eds.): Rothmaler excursion flora from Germany. Volume 5: Herbaceous ornamental and useful plants . Spectrum Academic Publishing House, Berlin Heidelberg 2008, ISBN 978-3-8274-0918-8 .
Individual evidence
- ^ In: Prodromus Florae Novae Hollandiae et Insulae van-Diemen . London 1810. online
- ↑ florabase online
