Nymphaea pedersenii
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| 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]
Vegetative characteristics
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]
Generative characteristics
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]
Cytology
The diploid chromosome count is 2n = 18.[3]
Reproduction
Taxonomy
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]
Type specimen
The type specimen was collected by Wiersema, Vanni and Schinini in a lagoon in Itatí, Corrientes, Argentina on the 15th of April 1982.[3]
Placement within Nymphaea
It is placed in Nymphaea subg. Hydrocallis.[3]