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Hydrocharitaceae A. L. de Jussieu

Habit: Aquatics growing in or on water, Aquatic submerged, Aquatic emergent, Aquatic leaves floating, Aquatic fresh water, Aquatic marine, Herbaceous, Annuals, Perennials

Roots: Rhizomes, Stolons or runners, Sap clear

Leaves: Leaves - petiolate, Leaves - sheathing at base, Leaves - sheath open, Leaves - simple, Leaves - cauline, Leaves - basal (rosette), Leaves - alternate, Leaves - opposite, Leaves - whorled, Leaves - 2-ranked (distichous), Leaves - spiral, Leaves - linear or filiform (grass-like), Leaves - blade broad, Leaves - venetion parallel, Leaves - soft, Leaves - margins entire

Inflorescence: terminal, lateral or axillary, bracteate, scapose, flowers solitary, cymes, umbels, verticellate in whorls, subtended by large spathe (leaf-like bract), Flowers sessile, Flowers pedicellate

Flowers: Flowers unisexual, Plants dioecious, Flowers bisexual, Perianth present, Perianth absent, Flowers minute barely visible, Flowers small, Flowers large and showy, Flowers 3 merous, Flowers actinomorphic, Floral bracteoles present

Sepals/Tepals: Sepals distinguishable from petals, Sepals green, Sepals separate

Petals/Tepals: Petals 3, Petals mostly separate, Petals white (to pinkish)

Stamens: Stamens 2, Stamens 3, Staminodes present

Pistil: Carpels separate (apocarpous), Carpels united, Carpels 3, Carpels many, Ovary inferior, Styles 1, Stigma terminal capitate or trilobed, Locules 1, Placentation parietal, Placentation laminar

Fruit: Fruit - capsule, Fruit - berry

Seeds: Seeds - few (2-10) per locule, Seeds - numerous per locule, Seeds - minute dust-like, Seeds - lacking tuft of hair, Seeds - surface +/- smooth, Seeds - round or ellipsoid


 

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