2402 Stuckenia Börner
- Börner, Abh. Naturwiss. Vereine Bremen 21: 258 (1912).
- Coleogeton (Rchb.) Les & R.R. Haynes, Novon 6: 389 (1996). - Potamogeton subg. Coleogeton Rchb., Icon. Fl. Germ. Helv. 7: 10 (1845).
- Excluded: Stuckenia striata.
Notes: The variation in the northern species of Stuckenia and its taxonomic representation is not well resolved. Eurasian and North American treatments of the principal species are rather different. Eurasian authors accept for their areas three or four species without racial differentiation but connected by sterile hybrids: S. filiformis, S. pectinata, S. vaginata, and some also S. subretusa (see, e.g., Tolmachev 1960; Dandy 1980; Tzvelev 1987c; Hämet-Ahti et al. 1998; Mossberg and Stenberg 2003; Elven et al. 2005; Tzvelev PAF proposal). For North America, Haynes and Hellquist (2000c) accepted three species, S. filiformis, S. pectinata, and S. vaginata, but S. filiformis with three subspecies, and all three species circumscribed (from their annotations in herbaria and their descriptions) at some variance with how they are circumscribed and characterized in Europe and northern Asia. We do not know whether this is due to a different morphological pattern in North America compared with Eurasia or to application of different characters, but we suspect a combination. All the species names and one major subspecific name applied by Haynes and Hellquist (2000c) are based on Eurasian types, which means that Eurasian meanings must prevail when applying these names.