190101-02 The Alisma plantago-aquatica aggregate A. plantago-aquatica, A. triviale
Geography: Circumboreal.
Notes: Several authors accept the predominantly Eurasian Alisma plantago-aquatica and the North American A. triviale as two species (e.g., Haynes and Hellquist 2000a; Tzvelev in comment). They are reported to be, respectively, diploid and tetraploid. However, Björkqvist (1961, 1968) reported both European A. plantago-aquatica and North American subsp. brevipes (= A. triviale) to be diploid with 2n = 14. This work has been neglected by subsequent authors but not as far as we know refuted. We have no explanation of the discrepancy.
Higher Taxa
- Alisma [1901,genus]