Hydrocharitaceae

Hydrocharitaceae Juss., Gen. Pl. 67. 1789. nom. cons. 'Tape Grass Family'

Characteristic Features:

Fresh water or marine aquatic herbs
Leaves submerged, usually ribbon like
Flowers subtended by paired bracts, male flowers detaching and floating on water surface
Gynoecium syncarpous, ovary inferior, bearing many scattered ovules
Fruit is capsule or berry

Diversity:

World- 16 genera 133 species (The Plant List 2013); 16 genera, 135 species (Christenhusz & Byng 2016); 17 genera, 150 species (Mabberely 2017); 16 genera, 133 species (Roskov et al. 2021)
India - 9 genera 18 species (Karthikeyan 2000); 9 genera, 21 species (BSI, 2021)
Indian Himalaya- 6 genera, 9 species (Singh et al. 2019)
Uttarakhand - 5 genera 6 species (Uniyal et al. 2007)

General Characters:

Hydrocharitaceae in Watson & Dallwitz (1992 onwards)
Hydrocharitaceae in Stevens (2001 onwards)
Hydrocharitaceae in POWO 2021 (Plants of the World Online)
Hydrocharitaceae in Wikipedia

Systematic Position of the Family in Different Systems of Classifications:

Systematic position in 2-Superkingdom, 7-Kingdom classification of Ruggiero et al. (2015)

Super Kingdom- Eukaryota, Kingdom- Plantae, Subkingdom- Viridiplantae, Infrakingdom- Streptophyta, Superphylum- Embryophyta, Phylum- Tracheophyta, Subphylum- Spermatophytina, Superclass- Angiospermae, Class- Magnoliopsida, Superorder- Lilianae, Order- Alismatales

Bentham & Hooker (1862-83)

Class : Monocotyledons
Series : Microspermae

Engler & Prantl (1887-1915)

Kingdom : Plantae
Division : Embryophyta Siphonogama
Subdivision: Angiospermae
Class : Monocotyledoneae
Order : Halobiae

Hutchinson (1973)

Phylum : Angiospermae
Subphylum: Monocotyledones
Division : Calycifear
Order : Butomales

Cronquist (1988)

Division : Magnoliophyta
Class : Liliopsida
Subclass : Alismatidae
Order : Hydrocharitales

Thorne & Reveal (2007)

Class : Magnoliopsida
Subclass : Alismatidae
Super Order: Alismatanae
Order : Alismatales

Takhtajan (2009)

Phylum : Magnoliophyta
Class : Liliopsida
Subclass : Alismatidae
Super Order: Alismatanae
Order : Hydrocharitales

Reveal (2012)

Class : Equisetopsida
Subclass : Magnoliidae
Super Order: Lilianae
Order : Alismatales

APG-IV (2016)

Clade : Angiosperms
Clade : Monocots
Order : Alismatales

Shipunov (2020)

Class : Angiospermae
Subclass : Liliidae
Order : Alismatales
Suborder: Alismatineae

Genera and Species in Pantnagar

To see larger image please click on the name

~Wild Flora~

Hydrilla verticillata (L.f.) Royle