Nymphaea sect. Chamaenymphaea
Section of the genus Nymphaea in the family Nymphaeaceae
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Nymphaea sect. Chamaenymphaea is a section within the subgenus Nymphaea subg. Nymphaea of the genus Nymphaea[2][3][4] native to North America,[4][5] Asia,[5] and Europe.[3]
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| Nymphaea sect. Chamaenymphaea | |
|---|---|
| |
| Nymphaea leibergii in its natural habitat | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Embryophytes |
| Clade: | Tracheophytes |
| Clade: | Spermatophytes |
| Clade: | Angiosperms |
| Order: | Nymphaeales |
| Family: | Nymphaeaceae |
| Genus: | Nymphaea |
| Subgenus: | Nymphaea subg. Nymphaea |
| Section: | Nymphaea sect. Chamaenymphaea (Planch.) Wiersema |
| Type species | |
| Nymphaea pygmaea (Salisb.) W.T.Aiton[1] | |
| Species | |
Description
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Vegetative characteristics
Its species have small,[3] erect,[4][6] cylindric, unbranched rhizomes lacking stolons.[4] Both floating and submerged leaves are produced.[4] The obovate to oval,[7] glabrous, petiolate leaves[4] with an entire margin[4][7] have glabrous petioles[4] with two primary air canals.[7]
Generative characteristics
The small, 3–7.5 cm wide,[6] white or rosy,[7] flowers have peduncles with 4 primary air canals.[7] The sepals are green. The 8–17 petals are white.[4] The filaments are widest above the middle of the filament.[3] The gynoecium consists of 5–12 carpels. The fruit bears smooth, ovoid, 2–3 mm long, and 1.5–2 mm wide seeds.[4]
Taxonomy
It was first published as Nymphaea subsect. Chamaenymphaea Planch. by Jules Émile Planchon in 1853.[8] It was then given a new status as Nymphaea sect. Chamaenymphaea (Planch.) Wiersema published by John Harry Wiersema in 1997.[9] It is placed in the subgenus Nymphaea subg. Nymphaea.[3]
Species
- Nymphaea leibergii (Morong) Rydb.[4]
- Nymphaea pygmaea (Salisb.) W.T.Aiton[6][5]
- Nymphaea tetragona Georgi[4]
Distribution
Fossil record
The fossil species †Nymphaea minuta Saporta has been described as being very similar to Nymphaea pygmaea[10][11] and Nymphaea tetragona.[12] It was speculated that it may represent an ancestral species of Nymphaea pygmaea.[11]