Īngiosperms are distinguished from the other seed-producing plants, the gymnosperms, by having flowers, xylem consisting of vessel elements instead of tracheids, endosperm within their seeds, and fruits that completely envelop the seeds. Angiosperms were formerly called Magnoliophyta ( / m æ ɡ ˌ n oʊ l i ˈ ɒ f ə t ə, - ə ˈ f aɪ t ə/). They are by far the most diverse group of land plants with 64 orders, 416 families, approximately 13,000 known genera and 300,000 known species. The term "angiosperm" is derived from the Greek words ἀγγεῖον / angeion ('container, vessel') and σπέρμα / sperma ('seed'), meaning that the seeds are enclosed within a fruit. They include insect-pollinated herbs such as buttercups, pond plants such as water lilies, wind-pollinated grasses, and trees such as apple and oak. įlowering plants are plants that bear flowers and fruits, and form the clade Angiospermae ( / ˌ æ n dʒ i ə ˈ s p ər m iː/), commonly called angiosperms.
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