Poales

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Poales
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Liliopsida
Order: Poales
Small
families

See text

Poales is a taxonomic order of flowering plants in the monocotyledons. The order includes families of plants such as the grasses, bromeliads, and sedges.

The earliest fossils attributed to the Poales date to the late Cretaceous period about 66 million years ago, though some suggest the origin of the group may be 115 million years ago in South America.[1] 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.

One recent classification lists these families: [2]

Uses[change | edit source]

The Poales are the most economically important order of monocots and possibly the most important order of plants in general. Within the order, by far the most important family economically is the family of grasses (Poaceae, syn. Gramineae), which includes barley, maize, millet, rice, and wheat. It is also the largest family in the order, far outnumbering the other families:

  • Poaceae: 12,070 species
  • Cyperaceae: 5,500 species
  • Bromeliaceae: 3,170 species
  • Eriocaulaceae: 1,150 species

References[change | edit source]

  1. Bremer K. 2002. Gondwanan evolution of the grass alliance of families (Poales). Evolution 56: 1374-1387. Abstract
  2. Angiosperm Phylogeny Group 2009. An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. Botanical Journal of the Linnean Society 161 (2): 105–121.