Grasses and sedges

Habitats

The following habitats are found across the Grasses and sedges distribution range. Find out more about these environments, what it takes to live there and what else inhabits them.

• Oak wood
• Farmland
• Bog
• Brackish water
• Brownfield land
• Chalk grassland
• Coastal
• Desert
• Beech wood
• Flooded grassland
• Heathland
• Hedgerows
• Marsh
• Wildflower meadow
• Mediterranean forest
• Mountain grassland
• Moorland
• Mountains
• Parkland
• Swamp
• Taiga
• Broadleaf forest
• Coniferous forest
• Temperate grassland
• Tropical coniferous forest
• Tropical dry forest
• Tropical grassland
• Rainforest
• Tundra
• Urban
• Wetlands

Behaviours

Discover what these behaviours are and how different plants and animals use them.

About

The Poales are a large order of flowering plants in the monocotyledons, and includes families of plants such as the grasses, bromeliads, and sedges. Sixteen plant families are currently recognized by botanists to be part of Poales.

The earliest fossils attributed to the Poales date to the late Cretaceous period about 66 million years ago, though some studies (e.g., Bremer, 2002) suggest the origin of the of the group may extend to nearly 115 million years ago, likely in South America. The earliest known fossils include pollen and fruits. The flowers are typically small, enclosed by bracts, and arranged in inflorescences (except in the genus Mayaca, with solitary terminal flowers). The flowers of many species are wind pollinated; the seeds usually contain starch. The APG III system (2009) accepts the order and places it in a clade called commelinids, in the monocots. It uses this circumscription:

• order Poales family Anarthriaceae family Bromeliaceae family Centrolepidaceae family Cyperaceae family Ecdeiocoleaceae family Eriocaulaceae family Flagellariaceae family Joinvilleaceae family Juncaceae family Mayacaceae family Poaceae family Rapateaceae family Restionaceae family Thurniaceae family Typhaceae family Xyridaceae

The earlier APG system (1998) adopted the same placement, although it used the spelling "commelinoids", and used the following circumscription (i.e., it did not include the plants in families Bromeliaceae and Mayacaceae in the order):

• order Poales family Anarthriaceae family Centrolepidaceae family Cyperaceae family Ecdeiocoleaceae family Eriocaulaceae family Flagellariaceae family Hydatellaceae (now transferred out of the monocots; recently discovered to be an 'early-diverging' lineage of flowering plants.) family Joinvilleaceae family Juncaceae family Poaceae family Prioniaceae family Restionaceae family Sparganiaceae (now included in family Typhaceae) family Thurniaceae family Typhaceae family Xyridaceae

The morphology-based Cronquist system did not include an order named Poales, assigning these families to the orders Bromeliales, Cyperales, Hydatellales, Juncales, Restionales and Typhales.

In early systems, an order including the grass family did not go by the name Poales but by a descriptive botanical name such as Graminales in the Engler system (update of 1964) and in the Hutchinson system (first edition, first volume, 1926), Glumiflorae in the Wettstein system (last revised 1935) or Glumaceae in the Bentham & Hooker system (third volume, 1883).

Read more at Wikipedia