Stemless lady's slipper
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Stemless lady's slipper ( Cypripedium acaule ) |
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| Cypripedium acaule | ||||||||||||
| Aiton |
The Stemless lady's slipper ( Cypripedium acaule ), also Rosablütiger woman shoe called, is a North American species of the genus Cypripedium in the family of orchids (Orchidaceae).
features
The stemless lady's slipper is a perennial plant with a rhizome that reaches heights of 20 to 45 centimeters. Two leaves develop that arise directly from the rhizome. They are oval and measure 10 to 28 × 5 to 15 centimeters. The flowers stand individually on the leafless inflorescence that arises between the two leaves. The outer and inner tepals are shorter than the lip and yellowish green to purple. The lateral petals are narrow and somewhat twisted. The lip color ranges from white with red veins to rose-red. The lip is elongated-oval shaped, 3 to 7 centimeters long, the opening is a narrow slit along its top. The staminodium has a rounded square to rhombic shape.
Flowering time is from April to June.
The number of chromosomes is 2n = 20.
Reproduction
The effort that stemless women's shoes put into reproductive success has been studied over several years by a team of botanists at Boston University . The subject of investigation was a population in hardwood forests in the east of the US state Massachusetts . The stem, flower and reproductive organs make up 18 percent of a dried plant. The effort that an average-sized plant goes to to successfully attract bumblebees, be fertilized, and then produce a seed pod that contains a few thousand tiny seeds reduces the likelihood that that plant will bloom for the next year by five to sixteen percent. A successful breeding season can affect a plant's growth for the next four years.
Occurrence
The stemless lady's slipper occurs in warm to temperate North America in dry to wet forests, swamps and heaths at altitudes from 0 to 1200 meters. It grows on strongly acidic soils. The distribution area extends from central and eastern Canada to the north-central and eastern United States.
use
The stemless lady's slipper is rarely used as an ornamental plant for vessels. The species has been in culture since 1786 at the latest.
supporting documents
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 .
- Charles John Sheviak: Cypripedium . In: Flora of North America Editorial Committee (Ed.): Flora of North America North of Mexico . tape 26 . Oxford University Press, New York and Oxford, S. 502 ( eFloras.org [accessed February 23, 2009] 1993+).
- Buchmann, Stephen L .; Nabhan, Gary Paul; Wilson, Edward Osborne; Mirocha, Paul: The forgotten pollinators . Covelo: Island Press , Washington 1996, ISBN 1-55963-353-0 (pbk).
Single receipts
- ^ Tropicos. [1]
- ↑ Buchmann et al., P. 44 and p. 45
- ↑ Rafaël Govaerts (ed.): Cypripedium acaule. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 23, 2020.
