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Nuphar sect. Astylus
Section of the genus Nuphar in the family Nymphaeaceae From Wikipedia, the free encyclopedia
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Nuphar sect. Astylus is a section within the genus Nuphar[2][1][3] native to North America.[4]
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Description
Upper and lower surface of Nuphar variegata leaf
Broad-necked, deeply furrowed fruit of Nuphar sect. Astylus (left) and smooth, urceolate fruit with a slim, elongate neck of Nuphar sect. Nuphar (right)
Vegetative characteristics
Its species are herbaceous plants.[2]
Generative characteristics
The flowers have 6–9 sepals.[5] The androecium consists of laminar stamens[6] with long anthers and short filaments.[5][6] The furrowed,[5][7] barrel-shaped,[4] ovoid fruit[6] does not have a prominent neck.[6][7][4]
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Taxonomy
It was described by Donald Jay Padgett in 1999 with Nuphar advena (Aiton) W.T.Aiton as the type species.[8][4]
Species
- Nuphar advena (Aiton) W.T.Aiton[2][6]
- Nuphar polysepala Engelm.[2][6]
- Nuphar variegata Engelm. ex Durand[2][6]
- Nuphar sagittifolia (Walter) Pursh[9]
- Nuphar carlquistii DeVore, Taylor & Pigg[6]
- Nuphar ulvacea (G.S.Mill. & Standl.) Standl.[6]
- Nuphar orbiculata (Small) Standl.[6]
- Nuphar ozarkana (G.S.Mill. & Standl.) Standl.[6]
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Etymology
The section name Astylus means without a style.[10][11] The fruits of Nuphar sect. Astylus have broad necks, whereas fruits of Nuphar sect. Nuphar have narrow necks[5] or "styles".[4]
Distribution
It is native to North America.[4]
Fossil record
The fossil species †Nuphar carlquistii from the early eocene of north-central Washington, USA has been identified as member of Nuphar sect. Astylus.[6]
Ecology
Pollination
The flowers are pollinated by flies, bees, and beetles.[5]
References
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