Heart-leaved pike herb
| Heart-leaved pike herb | ||||||||||||
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Heart-leaved pikeweed ( Pontederia cordata ) |
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| Pontederia cordata | ||||||||||||
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The heart-leaved pike herb ( Pontederia cordata ) is a species of pike herb ( Pontederia ) in the family of water hyacinth plants (Pontederiaceae).
features
The heart-leaved pike herb is a perennial water plant that reaches heights of 30 to 100 cm. It forms a rhizome as a permanent organ. The lower leaves are sessile and linear, the upper ones have long stalks, their blade is lanceolate to heart-arrow-shaped and they measure 6 to 22 × 7 to 12 centimeters. The flowers are two-lipped, funnel-shaped and only open for one day. The corolla lobes are blue to blue-violet in color, lanceolate and 5 to 8 millimeters long, the upper ones have a two-lobed yellow spot. The fruits are solitary closing fruits, which are enclosed in the hardened perigon tube .
The flowering period extends from June to August.
The number of chromosomes is 2n = 16.
Occurrence
The distribution area extends in the warm temperate east of America from Southeast Canada to Minnesota , Florida and Texas , Mexico and Central and South America. Here the plant occurs in the bank reed beds of ponds and lakes down to a water depth of 30 centimeters.
use
The heart-leaved pike herb is used as an ornamental plant for the edges of park and garden ponds. It has probably been in culture since 1579 at the latest.
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
- ^ Pontederia cordata at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
