Αποτελέσματα Αναζήτησης
The ferns (Polypodiopsida or Polypodiophyta) are a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers.
19 Σεπ 2024 · Fern, class of several thousand species of nonflowering vascular plants that reproduce by spores. Ferns have true roots, stems, and complex leaves and constitute an ancient division of plants. Learn about their physical characteristics, life cycle, genetics, evolutionary history, and classification.
14 Μαΐ 2018 · Ferns are plants with complex leaves and stems that reproduce by spores. They belong to the Filicinophyta phylum, also called the Pteridophyta phylum, and have about 11,000 species worldwide.
31 Οκτ 2023 · Learn about the types and characteristics of seedless vascular plants, such as club mosses, horsetails, whisk ferns, and ferns. Find out how they reproduce, where they live, and how they evolved.
Ferns (Subclass Polypodiidae) Gametophyte morphology Reduced, thalloid, heart-shaped. Often referred to as a prothallus or prothallium. Sporophyte morphology Megaphylls often pinnately compound fronds, emerging as fiddleheads in the spring. Sporangia produced in clusters called sori (sorus, singular).
18 Μαΐ 2024 · True ferns are highly competitive even to angiosperms. In spite of their “primitive” life cycle, they have multiple advantages: abilities to photosynthesize in deep shade (they are not obliged to grow fast), to survive high humidity, and to make billions of reproductive units (spores).
Learn about the characteristics, life cycle, and ecology of ferns, the largest group of living seedless vascular plants. Find out how ferns are ancient, diverse, and adaptable to various habitats.
