Ball primrose
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Ball primrose ( Primula denticulata ) |
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The ball primrose ( Primula denticulata ) is a species of the genus primroses ( Primula ). It is native to Asia.
description
Vegetative characteristics
The ball primrose grows as a perennial herbaceous plant that reaches heights of up to 30 centimeters.
The leaves , arranged in a basal rosette, have a broadly winged petiole that is indistinctly differentiated from the leaf blade and is almost as long as the leaf blade. The simple, elongated or inverted-lanceolate leaf blade initially has a length of 3 to 15 cm and extends to a length of up to 20 cm and a width of usually 1.5 to 4 cm until the fruit is ripe. The base of the blade narrows towards the petiole , the upper end is rounded or blunt and the edge of the leaf is serrated. The underside of the leaf is hairy or almost glabrous along the veins and sometimes white or yellow floured when the fruit is ripe. The upper side of the leaf is hairy or glabrous.
Generative characteristics
The fluffy hairy or bare inflorescence stem is 5 to 30 cm high during the flowering period and extends up to 45 cm until the fruit is ripe; the top half can be floured. The spherical, head-shaped, dold-like inflorescence contains many flowers. The many overlapping at their base support sheets are at a length of 5 to 10 mm and slightly arched lanceolate. The flower stalk has a length of 1 to 5 mm.
The hermaphroditic flowers are radial symmetry and five-fold with a double flower envelope . The terminal flowers of the inflorescence open and are fertile . The five 5 to 10 mm long sepals are fused narrowly bell-shaped up to a maximum of half their length. The five calyx teeth, often purple-colored, are elongated-lanceolate and floured or have tiny glands and are ciliated. The five pink-purple, purple to blue or rarely white petals are fused to a 0.8 to 1.2 cm long corolla tube. The crown throat has a diameter of 1 to 2 cm and a yellow eye. The five obovate crown lobes are deeply edged. The ovary is on top. There is heterostyly . There is only the inner circle with mostly five stamens . There are roughly the same number of individuals with a style 1.5 to 2 mm long and stamens inserted about 6 mm above the base of the corolla tube, as are those with a style 6 to 7 mm long and stamens inserted about 3 mm above the base of the corolla tube.
The flowering period extends from March to April. The pollination is effected by insects ( Entomophilie ).
The almost spherical capsule fruit is shorter than the calyx and contains many seeds.
Chromosome number
The number of chromosomes is 2n = 32, 34 or 44.
Occurrence
The ball primrose is native to Afghanistan in the Hindu Kush , as well as northern Pakistan , Nepal , Sikkim , Bhutan , southeastern Tibet , Yunnan , Sichuan , Guizhou and northern Myanmar . In China it occurs in wet, clear locations at altitudes of 1500 to 4100 meters.
use
The spherical primrose has been in culture since 1838 at the latest. It is used as an ornamental plant in rock gardens , shrub beds and groups of trees. There are numerous varieties, for example 'Alba', 'Blauer Auslese', 'Dark Colors' or 'Rubin'.
Philatelic
In the flowers stamp series , Deutsche Post AG is issuing a stamp with a ball primrose motif worth 80 euro cents. The design comes from the graphic designers Stefan Klein and Olaf Neumann in Iserlohn . First issue date is December 4, 2014.
swell
- Qiming Hu, Sylvia Kelso: Primulaceae . In: Wu Zheng-Yi, Peter H. Raven (Ed.): Flora of China . Myrsinaceae through Loganiaceae. tape 15 . Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 1996, ISBN 0-915279-37-1 , Primula denticulata , pp. 122 (English, Primula denticulata - online ). (Section Description and Distribution)
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
- ↑ Primula denticulata at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
