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Ferns |
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Adderstongue, Southern "Adder's tongue fern (Ophioglossum vulgatum L.). R, runner or stolon." -Gager, 1916... |
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Adderstongue, Southern Ophioglossum vulgatum, or Southern Adderstongue is a fern-like plant commonly growing in sand dunes.... |
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Annuli "The elastic ring which surrounds the spore case."-Whitney, 1902... |
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Antheridium of Bracken An illustration of the anteridium of a bracken. An antheridium (plural: antheridia) is a haploid structure or organ producing and containing male gametes (called antherozoids or sperm). Brackens (Pt... |
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Archegonium of Bracken An illustration of the archegonium of bracken. An archegonium (pl: archegonia), is a multicellular structure or organ of the gametophyte phase of certain plants producing and containing the ovum or f... |
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Aspidium, Pinnule of An illustration of a pinnule of aspidium showing veins and sori.... |
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Asplenium, Pinnule of An illustration of a pinnule of aspenium showing veins and sori.... |
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Bracken Branch "End of Branch, Common Brake. Bracken (Brake), a species of fern very common in America and Europe generally, and often covering large areas on hillsides and on untilled grounds." -Vaughan, 1906... |
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Coal Ferns, Fossilized The rocky ceiling of a coal mine is ornamented everywhere by exquisite tracery, inimitale representation of the delicate frond of ferns. Remove a scale of rock and we discover an exquisite fossilized ... |
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Coal Ferns, Fossilized The rocky ceiling of a coal mine is ornamented everywhere by exquisite tracery, inimitale representation of the delicate frond of ferns. Remove a scale of rock and we discover an exquisite fossilized ... |
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Coal Ferns, Fossilized The rocky ceiling of a coal mine is ornamented everywhere by exquisite tracery, inimitale representation of the delicate frond of ferns. Remove a scale of rock and we discover an exquisite fossilized ... |
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Ducts Scalariform ducts of a Fern, torn into a band.... |
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Feloher from Nineveh "One of an order of beings, the life-principles or geniuses or tutelary spirits of living beings, believed in and reverenced by the ancient Persians, adherents of the Zoroastrian religion. (Also) a na... |
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Fern A common fern plant.... |
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Fern A common fern plant.... |
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Fern Epidermis "A, Upper epidermis; B, lower epidermis, of the fern, Drynaria meyeniana." -Gager, 1916... |
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Fern Fossil "Fossil Fern (Neuropteris)." -Taylor, 1904... |
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Fern Fossil A fossil fern (Pterophyllum) in a piece of jet.... |
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Fern Fossil "Phlebopteris–a characteristic Oolite fern." -Taylor, 1904... |
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Fern frond "Frond of fern bearing sporangia in sori."—Finley, 1917... |
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Fern Germination "Germination of the spores of a fern. a, Before germination; b, early stage, showing protonema (pr.), and first rhizoid (rh); c, d, e, f, successive stages in the development of the prothallus." -Gage... |
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Fern Growth "A, B, C, D, Successive stages of growth of prothallium from the spore in Osmunda cinnamomea; E, growth of fern plant from fertilized egg within the prothallium of Osmunda Claytoniana." -Stevens, 1916... |
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Fern Leaves "Fern leaves, showing various degrees of subdivision or branching of the blade. A, Phyllitis; B, Polypodium; C, Pteris; D, Adiantum." -Gager, 1916... |
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Fern Prothallus "Fern prothallus; cross-sections showing antheridia (an), sperms (sp), and rhizoids (rh). Below at the right is a sperm (sp) greatly enlarged." -Gager, 1916... |
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Fern Reproduction "A, Antheridium containing sperm cells; B, archegonium containing an egg cell which has been found by five sperm cells. All from Osmunda cinnamomea." -Stevens, 1916... |
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