Chinese sticky seed
| Chinese sticky seed | ||||||||||||
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Chinese sticky seeds ( Pittosporum tobira ) with fruits |
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| Scientific name | ||||||||||||
| Pittosporum tobira | ||||||||||||
| ( Thunb. ) WTAiton |
The Chinese sticky seed ( Pittosporum tobira ) is a species of sticky seed ( Pittosporum ) in the sticky seed family (Pittosporaceae). It is native to East Asia and some varieties are used as ornamental plants .
description
Vegetative characteristics
The Chinese sticky seed grows as an evergreen shrub or small tree and reaches heights of up to about 6 meters. The alternate leaves, which are often crowded on the younger branches, are divided into a petiole and a leaf blade. The petiole is about 2 inches long. The simple, shiny and leathery leaf blade is oblong to obovate, with a length of 4 to 9 centimeters and a width of 1.5 to 4 centimeters.
Generative characteristics
The flowering period extends from March to May. The terminal or at least close to the projecting ends of branch inflorescences are cones or Schirmrispen . The lanceolate bracts are 4 to 5 millimeters long. The flower stalks are 1 to 2 inches long.
The fragrant flowers are radial symmetry and five-fold with a double flower envelope . The sepals are lanceolate and 3 to 4 millimeters in size. The petals, which are initially white and later turn yellow, have a length of 1 to 1.2 centimeters and are lanceolate. The ovary is densely hairy.
The capsule fruit is around 1.2 centimeters in diameter and contains numerous seeds. The pericarp is yellow-brown, woody and about 1.5 millimeters thick. The red seeds are about 4 millimeters in size.
Chromosome number
The number of chromosomes is 2n = 24 or 28.
distribution
The homeland of the Chinese glue seed is in East Asia . In Japan its distribution area extends over the western Honshū , over Kyūshū , Shikoku and the Ryūkyū Islands . It occurs in southern Korea and Taiwan . In China it occurs in the southeastern province of Fujian ; However, it is not certain whether this occurrence is native to mainland Asia.
Taxonomy
The first publication took place in 1780 under the name ( Basionym ) Euonymus tobira by Carl Peter Thunberg . The new combination to Pittosporum tobira (Thunb.) WT Aiton was published in 1811 by William Townsend Aiton .
use
The Chinese sticky seed is used almost worldwide in climatically suitable regions as an ornamental plant in parks and gardens. It tolerates frosts down to about −5 ° C. It is not hardy in Central Europe .
There are several cultivated forms (selection):
- 'Variegata': This form has gray-green and cream-white variegated leaves; it is usually only 1.5 meters high.
- 'Wheeler's Dwarf': This form is dwarfed and only about two feet tall.
swell
literature
- Zhi-Yun Zhang, Nicholas J. Turland: Pittosporum tobira. In: Wu Zhengyi, Peter H. Raven, Deyuan Hong (Eds.): Flora of China . Volume 9: Pittosporaceae through Connaraceae . Science Press / Missouri Botanical Garden Press, Beijing / St. Louis 2003, ISBN 1-930723-14-8 , pp. 4 (English). , online. (engl.)
Individual evidence
- ↑ Pittosporum tobira at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ Carl Peter Thunberg: Nova Acta Regiae Soc. Sci. Upsal. , Volume 3, 1780, p. 208.
- ↑ a b Pittosporum tobira in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.
- ^ William Townsend Aiton: Hortus Kew. 2nd edition, Volume 2, 1811, p. 27.
Web links
- Datasheet at desert-tropicals.com . (engl.)
- Edward F. Gilman, 1999: Data sheet on Pittosporum tobira at the University of Florida.
- Data sheet for cultivar 'Variegata' at the University of Florida. (English; PDF file; 90 kB)
- Data sheet for cultivar 'Wheeleri' at the University of Florida.