NationMaster - Encyclopedia: Hydrocharitaceae

Hydrocharitaceae is a plant family that includes a number of species of aquatic plant, broadly called the Tape-grasses, and includes the well known Canadian Waterweed and Frog's Bit. Aquatic plants â€” also called hydrophytic plants or hydrophytes â€” are plants that have adapted to living in or on aquatic environments. ...

This familt includes both fresh and marine aquatics. They are found throughout the world in a wide variety of habitats, but are primarily tropical.

The species are annual or perennial, with a creeping monopdial rhizome with the leaves arranged in two vertical rows, or an erect main shoot with roots at the base and spirally arranged or whorled leaves. The leaves are simple and usually found submerged, though they may be found floating or partially emerse. As with many aquatics they can be very variable in shape - from linear to orbicular, with or without a petiole, and with or without a sheathing base. Leaves are an Icelandic five-piece alternative rock band who came to prominence in 2002 with their debut album, Breathe, drawing comparisons to groups such as Coldplay and Doves. ... Roots is: The plural of Root Roots (album) Roots (TV miniseries), a mini-series based on a novel by Alex Haley Roots: The Saga of an American Family, a novel by Alex Haley Roots Canada Ltd. ... Leaves are an Icelandic five-piece alternative rock band who came to prominence in 2002 with their debut album, Breathe, drawing comparisons to groups such as Coldplay and Doves. ... Leaves are an Icelandic five-piece alternative rock band who came to prominence in 2002 with their debut album, Breathe, drawing comparisons to groups such as Coldplay and Doves. ...

The flowers are arranged in a forked, spathe-like bract or between two opposite bracts. They are usually irregular, though in some case they may be slightly irregular, and either nisexual or unisexual. The perianth segments are in 1 or 2 series of (2-)3 free segments; the inner series when present are usually showy and petal-like. Stamens 1 - numerous, in 1 or more series; the inner ones sometimes sterile. Pollen is globular and free but in the marine genera (Thalassia and Halophila) - the pollen grains are carried in chains, like strings of beads. ovary is inferior with 2 - 15 united carpels containing a single locule with numerous ovules on parietal placentas which either protrude nearly to the centre of the ovary or are incompletely developed. Fruits are globular to linear, dry or pulpy, dehiscent or more usually indehiscent and opening by decay of the pericarp. Seeds are normally numerous with straight embryos and no endosperm. Wildflowers A flower is the reproductive organ of those plants classified as angiosperms ( flowering plants; Division Magnoliophyta). ... Flower of the spider tree (Crateva religiosa) with its numerous conspicuous stamens The stamen is the male organ of a flower. ... SEM image of pollen grains from a variety of common plants: sunflower (Helianthus annuus), morning glory (Ipomoea purpurea), hollyhock (Sidalcea malviflora), lily (Lilium auratum), primrose (Oenothera fruticosa), and castor bean (Ricinus communis). ... Ovary in plants is the female part of a flower. ... Popular Japanese fashion magazine throughout the 1990s; the photography of which has recently been reissued in two collections from Phaidon press. ... This writeup is about biological seeds; for other meanings see Seed (disambiguation). ...

Some botanists divide this family into three sub-families - Hydrocharitoideae, Thalassoideae (Thalassia) and Halophiloideae (Halophila).

Uses

Some species have become established ornamental plants, and subsequently serious weeds in the wild (such as Elodea).

Genera

Categories: Alismatales | Aquatic plants | Plant families Species Egeria chilensis Egeria densa Egeria heterostemon Egeria matthewsii Egeria najas Egeria is a genus of aquatic plant native to Brazil. ... Species Elodea canadensis Elodea nuttallii Elodea is a genus of aquatic plants often called the Water weeds. ... The hydrilla is a totally submerged plant Species Hydrilla asiatica Hydrilla japonica Hydrilla lithuanica Hydrilla ovalifolica Hydrilla verticillata Hydrilla is an aquatic plant, it is native to the warm waters of Asia, Africa and Australia. ... Hydrocharis is a genus of aquatic plants within the family Hydrocharitaceae. ... Najas is the botanical name of a genus of aquatic plants. ... Species Stratoites acorides Stratoites alismoides Stratoites aloides Stratoites nymphoides Stratoites is a genus of aquatic plant commonly known as water soldiers. ... Species Vallisneria aethiopica Vallisneria americana Vallisneria alternifolia Vallisneria anhuiensis Vallisneria asiatica Vallisneria natans Vallisneria spiralis Vallisneria is a genus of aquatic plant, commonly called eelgrass or tape grass. ...

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Genera

Uses