Potamogeton trichoides
| Potamogeton trichoides | |
|---|---|
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| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Monocots |
| Order: | Alismatales |
| Family: | Potamogetonaceae |
| Genus: | Potamogeton |
| Species: | P. trichoides |
| Binomial name | |
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Potamogeton trichoides Cham. et Schltdl. 1827 |
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| Synonyms | |
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Potamogeton baentzii Gand. Potamogeton condylocarpus Tausch Potamogeton danicus Gand. Potamogeton monogynus J.Gay Potamogeton orthorrhynchus Gand. Potamogeton perneglectus Gand. Potamogeton phialae Post Potamogeton tuberculatus Ten. & Guss. |
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Potamogeton baentzii Gand. Potamogeton condylocarpus Tausch Potamogeton danicus Gand. Potamogeton monogynus J.Gay Potamogeton orthorrhynchus Gand. Potamogeton perneglectus Gand. Potamogeton phialae Post Potamogeton tuberculatus Ten. & Guss.
Potamogeton trichoides is a species of aquatic plant known by the common name hairlike pondweed, native to Europe and western Asia where it grows in calcareous, usually nutrient-rich standing or slow-flowing water.
Hairlike pondweed is an aquatic perennial that dies back each winter into a large number of asexually produced resting bodies called turions. There are no rhizomes. It produces slender, cylindrical or slightly compressed, branching stems usually less than a metre in length but occasionally up to 2 m. The submerged leaves are long and very narrow, typically 16–80 mm long and 0.3–1 mm wide, with the midrib occupying up to 70% of the width of the leaf near the base. They are rigid and green turning darker with age. There are no floating leaves.
The inflorescence is a short spike of 3–5 flowers arising from the water on a slender peduncle.
This species readily hybridizes with several other species of Potamogeton including P. berchtoldii (P. × franconicus G.Fisch.), P. pusillus (P. × grovesii Dandy & G.Taylor) and P. compressus (P. × ripoides Baagøe).
Hairlike pondweed is diploid, with 2n=26 chromosomes.
Hairlike pondweed is one of the more distinctive fine-leaved pondweeds due to the characteristically stiff leaves dominated by the midrib and open but tightly rolled stipules. However, it tends to be rarer than other fine-leaved species and often grows in mixed beds with other fine-leaved water plants such as P. pusillus and Zannichellia palustris, so it may be overlooked.
Potamogeton trichoides (trichoides = 'hairlike') was named by the German botanists Adelbert von Chamisso and Diederich Franz Leonhard von Schlechtendal in 1827.
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Wikipedia