Fern Structure - US Forest Service
Other ferns, such as the moonworts have sterile pinnae and fertile pinnae on the same leaf. This can be seen in the moonwort fern (Botrychium lunaria). Sori (singular: sorus) are groups of sporangia (singular: sporangium), which contain spores. Sori are usually found on …
Fern - Spore, Sorus, Reproduction | Britannica
2024年9月19日 · sori Examples of sori and arrangements of sporangia in various species of ferns. (more) Hand in hand with the reduction in size of single sporangia are seen more and more complex aggregations of sporangia known as sori.
16.3C: Fern Life Cycle - Biology LibreTexts
2020年12月31日 · Figure 16.3.3.1 Fern life cycle. The plant we recognize as a fern is the diploid sporophyte generation. Sori form on the fronds. Each contains many sporangia mounted on stalks. Within each sporangium, the spore mother cells undergo meiosis producing four haploid spores each. When the humidity drops,
Search - 6.2.2: Ferns - Biology LibreTexts
Fern sporophytes are composed of megaphylls, often pinnately compound fronds that emerging as fiddleheads in the spring. Sporangia are produced in clusters called sori (sorus, singular) on the fronds.
Grow Your Own Ferns… From Spores! - Laidback Gardener
2017年2月12日 · What you see under a typical frond are the sori (singular sorus), also called or spore cases, that contain the spores. They usually look like small bumps or lines, usually placed in a symmetrical pattern, and are often green at first, becoming brown or golden at maturity. Inside the sori are clusters of sporangia (spore-producing cells).
Sorus | Ferns, Spores & Reproduction | Britannica
Sorus, in botany, brownish or yellowish cluster of spore-producing structures (sporangia) usually located on the lower surface of fern leaves. A sorus may be protected during development by a scale or flap of tissue called an indusium.
25.4D: Ferns and Other Seedless Vascular Plants
2023年10月31日 · Most ferns produce the same type of spores and are, therefore, homosporous. The diploid sporophyte is the most conspicuous stage of the life cycle. On the underside of its mature fronds, sori (singular, sorus) form as small clusters where sporangia develop.
Ferns, Spores, and Plant Reproduction | Smithsonian National …
fern, plant, reproduction, seed-free, spore, dispersal. Key Concepts. Reproduction of plants; Alternation of generations; Seeds and spores; Characteristics of ferns; Technology used by botanists; Resource Types
The evolution, morphology, and development of fern leaves
This evidence, along with studies designed to understand the molecular genetic basis of fern leaf diversity will provide crucial data on leaf developmental pathways in ferns and allow us to refine existing hypotheses on fern leaf evolution.
Fern Life Cycle - Science Notes and Projects
2023年5月28日 · Fern fronds house a fascinating feature: sporangia. Sporangia are tiny cases called sori found on the underside of fronds that produce and contain spores. These spores are the means by which ferns propagate. The fern life cycle involves alternation of generations.