Bract hydrangea

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Bract hydrangea
illustration

illustration

Systematics
Asterids
Order : Dogwood-like (Cornales)
Family : Hydrangea family (Hydrangeaceae)
Subfamily : Hydrangeoideae
Genre : Hydrangeas ( Hydrangea )
Type : Bract hydrangea
Scientific name
Hydrangea involucrata
Siebold

The bract hydrangea ( Hydrangea involucrata ) is a small shrub belonging to the hydrangea family . It is sometimes used as an ornamental plant because of the decorative flowers . The natural range is in Japan.

description

The bract hydrangea forms 1 to 1.2, rarely 2 meter high shrubs with densely hairy young shoots. The leaves are simple and have a stem 6 to 25 millimeters long. The leaf blade is oval to elongated ovate, 7.5 to 15 centimeters long, pointed with a wedge-shaped base and serrated leaf margin. Both sides, but especially the underside of the leaf, are hairy with bristles.

The flowers are arranged in umbels up to 12 centimeters wide . When blooming, the inflorescences are spherical, 2 to 3 centimeters thick and covered by two to three large, round, white or bluish bracts that later fall off . The few sterile flowers grow on the edge of the inflorescence. They are 1.5 to 3 centimeters wide, white, rarely pink or bluish and have long stalks. The fertile flowers are mostly pink.

The species blooms from July to September.

The number of chromosomes is 2n = 30.

photos

  • leaf

  • Blooming inflorescence

  • inflorescence

Distribution and location

The natural range is on the Japanese islands of Honshū , Kyushu and Shikoku . The species grows in species-poor or cool, moist forests on moderately dry to moist, slightly acidic to slightly alkaline, gravelly or sandy-loamy soils in partially shaded locations. It is usually frost hardy.

Systematics

The bract hydrangea ( Hydrangea involucrata ) is a species from the genus of hydrangeas ( Hydrangea ) in the hydrangea family (Hydrangeaceae), subfamily Hydrangeoideae, tribe Hydrangeae. It was first described by Philipp Franz von Siebold in 1829 .

use

The bract hydrangea is sometimes used as an ornamental wood because of its decorative flowers .

proof

literature

  • Andreas Roloff , Andreas Bärtels: Flora of the woods. Purpose, properties and use. With a winter key from Bernd Schulz. 3rd, corrected edition. Eugen Ulmer, Stuttgart (Hohenheim) 2008, ISBN 978-3-8001-5614-6 , pp. 338–339.
  • Jost Fitschen: Woody flora . 12th, revised and expanded edition. Quelle & Meyer, Wiebelsheim 2007, ISBN 3-494-01422-1 , p. 528 .

Individual evidence

  1. ↑ German name after Roloff et al .: Flora der Gehölze , p. 338 and Fitschen: Gehölzflora , p. 528
  2. ↑ a b c d Roloff et al .: Flora der Gehölze , pp. 338–339
  3. ↑ Fitschen: Gehölzflora , p. 528
  4. ^ Hydrangea involucrata at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
  5. ↑ a b Hydrangea involucrata. In: Germplasm Resources Information Network (GRIN). United States Department of Agriculture, accessed March 20, 2012 .

Web links

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