American pond rose
| American pond rose | ||||||||||||
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American pond rose ( Nuphar advena ) |
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| Scientific name | ||||||||||||
| Nuphar advena | ||||||||||||
| ( Aiton ) WTAiton |
The American pond rose ( Nuphar advena ) is a species of the water lily family (Nymphaeaceae).
features
The American pond rose is a perennial aquatic plant with a rhizome that is usually 5 to 10 cm in diameter and grows in water depths of 70 to 80 centimeters. The petiole is round or slightly flattened on top. The floating leaf blade is broadly ovate to almost circular, measures 12 to 40 × 7 to 30 centimeters and is 1.2 times as long as it is wide.
The hermaphrodite, radial symmetry flowers have a diameter of 2.5 to 5 centimeters. There are usually six sepals available. There are many spirally arranged petals . The nine to 28 scar rays end 1 to 3 millimeters from the edge of the scar disk. The pollination is done by insects, mostly beetles. The flowering period extends from May to August.
The mostly green fruits are 2 to 5 cm in size. The seeds are 3 to 6 mm in size.
Occurrence
The American pond rose occurs in eastern and central North America , in Mexico and Cuba in lakes, ponds, slowly flowing waters and spring meadows at altitudes of 0 to 450 meters.
Systematics
One can distinguish the following subspecies:
- Nuphar advena (Aiton) WT Aiton subsp. advena : It occurs in eastern Canada, the central and eastern United States, Mexico, and Cuba.
- Nuphar advena subsp. orbiculata (Small) Padgett (Syn .: Nuphar orbiculata (Small) Standl. ): It occurs in southeastern Alabama, in southern Georgia and in northern Florida.
- Nuphar advena subsp. ozarkana (GS Mill. & Standl.) Padgett (Syn .: Nuphar ozarkana (GS Mill. & Standl. ) Standl.): It occurs in southern Missouri, Oklahoma and northern Arkansas.
- Nuphar advena subsp. ulvacea (GS Mill. & Standl.) Padgett (Syn .: Nuphar ulvacea (GS Mill. & Standl.) Standl. ): It occurs only in Santa Rosa County in Florida.
use
The American pond rose is rarely used as an ornamental plant in garden ponds. They have been in culture since 1772 or 1802.
swell
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
- ↑ a b c d e f Nuphar in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved May 30, 2018.
