| Nymphaea pedersenii | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Order: | Nymphaeales |
| Family: | Nymphaeaceae |
| Genus: | Nymphaea |
| Subgenus: | Nymphaea subg. Hydrocallis |
| Species: | N. pedersenii |
| Binomial name | |
| Nymphaea pedersenii (Wiersema) C.T.Lima & Giul. [1] | |
| Synonyms [1] | |
| |
Nymphaea pedersenii is a species of waterlily native to Argentina, Bolivia, Brazil, and Uruguay. [1]
Nymphaea pedersenii has ovoid to subglobose tubers. [2] The broadly elliptic leaf blade is up to 31 cm long and 22 cm wide. [3] The coriaceous blade of the floating leaves is connected to non-brittle, brownish, glabrescent, 7.1−10 mm wide petioles with a ring of trichomes at the apex. It has two primary central air and six secondary peripheral air canals. [2] The leaf venation is actinodromous. [4]
The nocturnal flowers float on the water surface. [4] The syncarpous gynoecium consists of approximately 39 carpels with clavate, cream-coloured, curved, 1.2−1.8 cm long and 2−4 mm wide appendages. The globose apex shows rosy colouration. [2] The ellipsoid, granulose, pilose seeds have trichomes arranged in continuous longitudinal lines. [4]
The diploid chromosome count is 2n = 18. [3]
In Argentina, the main mode of reproduction relies on stolon formation. [3] Proliferating pseudanthia are absent. [2]
This species is not autogamous and outcrossing is obligatory. [3] Flowering occurs throughout the year. [2]
It was first described by Wiersema in 1987 as Nymphaea amazonum subsp. pedersenii, but later it was elevated to a separate species Nymphaea pedersenii by C.T.Lima and Ana Maria Giulietti in 2021. [1]
The type specimen was collected by Wiersema, Vanni and Schinini in a lagoon in Itatí, Corrientes, Argentina on the 15th of April 1982. [3]
It is placed in Nymphaea subg. Hydrocallis. [3]
The specific epithet pedersenii honours Troels Myndel Pedersen. [3]
In Brazil, it was observed in a stream with up to 3 m depth in the state Pará and in permanent or temporary lagoons in the Pantanal. [2] In Argentina, it was observed growing in a lagoon. [3]
It is pollinated by the beetle species Cyclocephala mollis . [3] Beetles have been found trapped within the flowers. [2]
Nymphaea is a genus of hardy and tender aquatic plants in the family Nymphaeaceae. The genus has a cosmopolitan distribution. Many species are cultivated as ornamental plants, and many cultivars have been bred. Some taxa occur as introduced species where they are not native, and some are weeds. Plants of the genus are known commonly as water lilies, or waterlilies in the United Kingdom. The genus name is from the Greek νυμφαία, nymphaia and the Latin nymphaea, which means "water lily" and were inspired by the nymphs of Greek and Latin mythology.
Nymphaea glandulifera is a species of waterlily native to tropical America.
Nymphaea gardneriana is a species of waterlily native to Cuba and tropical South America.
Nymphaea potamophila is a species of waterlily native to the region spanning from Venezuela to northern Brazil. Additionally, it has been reported to occur in Colombia.
Nymphaea oxypetala is a species of waterlily native to Bolivia, Brazil, Cuba, Ecuador, Paraguay, and Venezuela. It is a remarkable species with excessively acuminate and acute sepals and petals.
Nymphaea rudgeana is a species of waterlily native to the region spanning from Mexico to tropical South America.
Nymphaea tenuinervia is a species of waterlily native to Colombia, Guyana and Brazil.
Nymphaea belophylla is a species of waterlily native to Bolivia, Brazil and Venezuela.
Nymphaea amazonum is a species of water lily native to the region spanning from Mexico to tropical South America. It has been introduced to Bangladesh.
Nymphaea caatingae is a species of waterlily endemic to Northeast Brazil.
Nymphaea conardii is a species of waterlily native to the region spanning from Southern Mexico to tropical South America.
Nymphaea francae is a species of waterlily endemic to Brazil.
Nymphaea harleyi is a species of waterlily endemic to Brazil.
Nymphaea paganuccii is a species of waterlily endemic to Brazil.
Nymphaea rapinii is a species of waterlily endemic to Brazil.
Nymphaea lasiophylla is a species of waterlily native to East Brazil. It has also been introduced to the Venezuelan Antilles.
Nymphaea vanildae is a species of waterlily endemic to Pernambuco, Brazil.
Nymphaea lingulata is a species of waterlily native to Bolivia, Brazil, and Paraguay.
Nymphaea novogranatensis is a species of waterlily native to Colombia, Mexico, and Venezuela.
Nymphaea subg. Hydrocallis is a subgenus of the genus Nymphaea.