Seed plant - Wikipedia
网页A seed plant or spermatophyte (lit. 'seed plant'; from Ancient Greek σπέρματος (spérmatos) 'seed' and φυτόν (phytón) 'plant'), also known as a phanerogam (taxon Phanerogamae) or a phaenogam (taxon Phaenogamae), is any plant that produces seeds.
Seed plant | Definition, Examples, & Taxonomy | Britannica
网页Seed plant, any of the more than 300,000 species of seed-bearing vascular plants. Although the taxonomic division Spermatophyta is no longer accepted, the term ‘spermatophyte’ is used to refer collectively to the angiosperms and gymnosperms.
7.6: Spermatophyta - Seed Plants - Biology LibreTexts
网页2024年5月18日 · Higher groups of seed plants lost flagellate spermatozoa and developed pollen tubes. The classes of Spermatophyta are Ginkgoopsida, Cycadopsida, Pinopsida, Gnetopsida, and Angiospermae. Ginkgoopsida is just one species; ginkgo or maidenhair tree (Ginkgo biloba).
Spermatophyta (Seed Plants) — The Biology Primer
网页Seed plants (Division Spermatophyta) are the most common plants on earth today. In the fossil record, there are examples of now extinct tree ferns that had seeds, indicating seed plants likely originated from ferns. Seedless plants reproduce via spores, which are single-celled zygotes with a tough cell wall.
8.1: Spermatophyta 2.0 - Biology LibreTexts
网页2024年5月18日 · Flowering plants (angiosperms, Angiospermae) are sometimes referred to as “Spermatophyta 2.0.”, or “upgraded gymnosperms”. In fact, there is no single character which unequivocally differs flowering plants from other seed plants. Only several characteristics combined together will distinguish angiosperms.
Spermatophyte - Encyclopedia.com
网页2018年5月29日 · spermatophyte Seed-bearing plant, including most trees, shrubs, and herbaceous plants. It has a stem, leaves, roots, and a well-developed vascular system. The dominant generation is the sporophyte.
Introduction to the Seed Plants - University of California Museum …
网页The spermatophytes, which means "seed plants", are some of the most important organisms on Earth. Life on land as we know it is shaped largely by the activities of seed plants. Soils, forests, and food are three of the most apparent products of this group.
Spermatophyta - Plant Evolution
网页a) The sporophyte generation is usually a tree or a shrub. Various types of branching and leaf shapes exist. b) Sporangia may be in cones but many other arrangements are to be found. c) Female gametophyte generation retained within the developing seed, the ovule.
Spermatophyte - an overview | ScienceDirect Topics
网页The spermatophytes are by far the most diverse lineage within vascular plants, with about 270,000 living species. All the spermatophytes share the production of secondary xylem (at least ancestrally) through the activity of the cambium (Judd et al., 2008).
25.1F: The Major Divisions of Land Plants - Biology LibreTexts
网页2023年10月31日 · The seed producing plants, or spermatophytes, form the largest group of all existing plants, dominating the landscape. Seed-producing plants include gymnosperms, most notably conifers, which produce “naked seeds,” and the most successful of all modern-day plants, angiosperms, which are the flowering plants.