Features of Biomorph of Hydrilla verticillata (Hydrocharitaceae)


The biomorphological features of Hydrilla verticillata (L. fil.) Royle in tropical and temperate regions of the Eurasian part of the geographical range have been studied. The shoot system is long-growing and sympodial, consisting of (annual)oligoennial monopodial shoots of main and subordinate orders. The number of leaves per node; shape, length, and width of leaf blade; branching peculiarities; and the length of the internode are the most variable signs. Hydrilla verticillata is a perennial (vegetatively oligoennial) polycarpic rooting long-shoot high turion-tuber vegetative–mobile hydrophyte. The flexibility of biomorphs in different biotypes is manifested by the duration of shoot ontogenesis and by a change in the ratio of the specialized vegetative diasporas. Turions and tubers are the two alternative models for maintaining the population.

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We are deeply grateful to Prof. B.F. Sviridenko (Omsk, Russia) for the proposed research idea and discussion of the manuscript and A.I. Mikhal’tsov (Children’s EcoCenter, Omsk, Russia) for assistance in micropreparation performing. Special thanks go to an anonymous reviewer for valuable comments.


This work was carried out at the cost and expense of the authors.

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Correspondence to A. N. Efremov.

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Translated by D. Martynova

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Efremov, A.N., Pushkina, A.A. & Bolotova, Y.V. Features of Biomorph of Hydrilla verticillata (Hydrocharitaceae). Inland Water Biol 13, 485–495 (2020). https://doi.org/10.1134/S1995082920030050

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  • Hydrilla verticillata
  • Hydrocharitaceae
  • biomorph
  • life form
  • turion
  • tuber
  • renewal
  • Eurasia