Foam spar

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Foam spar
Holodiscus argenteus

Holodiscus argenteus

Systematics
Eurosiden I
Order : Rose-like (rosales)
Family : Rose family (Rosaceae)
Subfamily : Spiraeoideae
Tribe : Spiraeeae
Genre : Foam spar
Scientific name
Holodiscus
( K. Koch ) Maxim.

The foam spar ( Holodiscus ) are a genus of shrubs from the rose family . Their distribution area is in North, Central and South America.

description

The foam spars are mostly deciduous, more or less hairy shrubs with gray, often overhanging branches and bark that rips open lengthways in the first year . The buds are elongated and densely lightly haired towards the tip. Terminal buds are 3 to 5 millimeters long, side buds 2 to 3 millimeters. The leaves are alternate. They are simple with an ovate, roughly toothed, incised, or pinnate leaf blade. Stipules are missing.

The flowers are numerous in up to 20 centimeters long, loose, terminal and mostly overhanging panicles . The individual flowers are 4 to 5 millimeters wide, the calyx is deep five-lobed, the five white to pale pink petals are only slightly longer than the calyx. The 15 outer of the 20 stamens are fused at the base. The five carpels sit in an open flower cup and are noticeably hairy. Solitary, non-popping nuts are formed as fruits .

distribution

The distribution area of ​​the approximately eight species extends from British Columbia in Canada through the United States and Central America to Colombia.

Systematics

The holodiscus ( Holodiscus ) are a genus of the family of Rosaceae (Rosaceae). There they are assigned to the subfamily Spiraeoideae, Tribus Spiraeeae. Karl Heinrich Koch first described the genre in 1869 , Carl Maximowicz carried out a new classification in 1879. The generic name chosen by Koch comes from the Greek holos for “whole” or “complete”, and from the Latin discus for “disk”. However, the motives for the naming are unclear.

About eight species are assigned to the genus:

Blooming branch of the forest foam spar ( Holodiscus discolor )
Desert foam spar ( Holodiscus dumosus )
Blooming branch of Holodiscus microphyllus

use

Only the forest foam spar ( Holodiscus discolor ) is often used as an ornamental shrub 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 , p. 335.
  • Jost Fitschen: Woody flora . 12th, revised and expanded edition. Quelle & Meyer, Wiebelsheim 2007, ISBN 3-494-01422-1 , p. 525 .
  • Helmut Genaust: Etymological dictionary of botanical plant names. 3rd, completely revised and expanded edition. Nikol, Hamburg 2005, ISBN 3-937872-16-7 , p. 292 (reprint from 1996).

Individual evidence

  1. ↑ a b German name according to Roloff et al .: flora of the woody plants and after Fitschen: woody flora
  2. ↑ Fitschen: Gehölzflora , p. 525
  3. ↑ a b c d e f Roloff et al .: Flora der Gehölze , p. 335
  4. ↑ a b c d e Holodiscus in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved April 20, 2017.
  5. ↑ Holodiscus (K. Koch) Maxim. In: The International Plant Names Index. Retrieved February 20, 2012 .
  6. ↑ Exactly: Etymological Dictionary of Botanical Plant Names , p. 292
  7. ^ German name according to Fitschen: Wood flora
  8. ↑ Holodiscus. In: The Plant List. Retrieved February 20, 2012 .

Web links

Commons : Foam Spear ( Holodiscus )  - Collection of images, videos and audio files