Flowering plant
Flowering plants dominate land habitats and sustain human agriculture.
Flowering plants, or angiosperms, are defined by their production of flowers and fruits, with seeds enclosed within a fruit. This group, formerly called Magnoliophyta, is the most diverse lineage of land plants, encompassing 64 orders, 416 families, roughly 13,000 genera, and an estimated 300,000 species. They include herbaceous forbs, grasses, most broad-leaved trees, shrubs, vines, and many aquatic plants. Angiosperms are distinguished from gymnosperms by several key features: they bear flowers, their xylem contains vessel elements rather than tracheids, they produce endosperm within seeds, and their fruits fully envelop the seeds. The ancestors of flowering plants diverged from the common ancestor of all living gymnosperms over 300 million years ago, before the end of the Carboniferous. During the Cretaceous period, they underwent a rapid diversification, becoming the dominant plant group worldwide.
Ecologically, angiosperms are cosmopolitan, thriving in terrestrial, freshwater, and marine environments. They dominate nearly every land habitat except frigid tundra and coniferous forests. Seagrasses in the Alismatales grow in marine coastal waters. Some species are adapted to extreme conditions: carnivorous sundews flourish in nutrient-poor acid bogs, while spring gentians thrive on alkaline chalk and limestone. Growth habits range from small, short-lived herbaceous annuals and biennials to long-lived perennial trees reaching nearly 100 meters in height, such as eucalypts and dipterocarps. Some species climb as vines or lianas. About 99% of flowering plants are photosynthetic autotrophs; the remainder are parasitic, either on fungi (myco-heterotrophic) or on other plants, wholly or partially. The vast majority of species belong to the eudicot (75%), monocot (23%), and magnoliid (2%) clades, with the remaining five clades containing fewer than 250 species. The botanical term "angiosperm" was coined in 1690 by Paul Hermann for plants with seeds in capsules, but its modern meaning—all flowering plants—was established by the mid-19th century following work by Robert Brown and Wilhelm Hofmeister. The Angiosperm Phylogeny Group (APG) has reclassified angiosperms since 1998, treating them as an unranked clade.
- field
- Botany
- known_for
- Bearing flowers and fruits; dominant land plant group; foundation of agriculture
- largest_species
- Eucalyptus gum trees and Shorea faguetiana, up to ~100 m tall
- smallest_species
- Wolffia duckweeds, less than 2 mm across
Lore & Background
Angiosperms, or flowering plants, bear flowers and fruits, with seeds enclosed within a fruit. The term derives from Greek words meaning "container" and "seed." They are the most diverse group of land plants, encompassing over 300,000 known species across 64 orders and 416 families. This group includes forbs, grasses, broad-leaved trees, shrubs, vines, and most aquatic plants. Distinguishing features include flowers, xylem composed of vessel elements rather than tracheids, endosperm within seeds, and fruits that fully envelop the seeds. Their ancestors diverged from gymnosperms over 300 million years ago, with a major explosive diversification during the Cretaceous period, making them the dominant plant group worldwide. The largest species, such as Eucalyptus gum trees and Shorea faguetiana, can reach nearly 100 meters in height, while the smallest, Wolffia duckweeds, are under 2 millimeters across. About 99% of flowering plants are photosynthetic autotrophs, with the remainder being parasitic on fungi or other plants. They occupy a wide range of habitats globally, from land and fresh water to marine environments like seagrasses, and are the dominant plant group in all terrestrial habitats except frigid tundra and coniferous forests. Some species thrive in extreme conditions, such as carnivorous sundews in acid bogs or spring gentians on alkaline limestone. Growth habits vary from small, short-lived herbaceous annuals to large, long-lived perennial woody trees, including climbing vines and lianas.
Reader's Guide
Nearly all species belong to the eudicot (75%), monocot (23%), and magnoliid (2%) clades. They occupy a wide range of habitats on land, in fresh water, and in the sea, dominating every habitat except frigid moss-lichen tundra and coniferous forest. Their evolutionary success is largely attributed to coevolutionary relationships with animal pollinators such as insects, birds, and bats, leading to specialized pollination syndromes. Agriculture depends almost entirely on angiosperms, with a small number of families supplying nearly all plant-based food and livestock feed. Many flowering plants are threatened by habitat destruction and climate change.
Did You Know?
- The term 'angiosperm' was coined by Paul Hermann in 1690, originally meaning plants with seeds enclosed in capsules.
- Some 99% of flowering plants are photosynthetic autotrophs; the remainder are parasitic on fungi or other plants.
- Seagrasses in the Alismatales grow in marine environments, spreading with rhizomes through mud in sheltered coastal waters.
More in Plant Families & Taxonomy 1-24
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