http://etc.usf.edu/clipart/ Free clipart for students & teachers! Welcome to quality educational clipart. Every item comes with a choice of image size and format as well as complete source information for proper citations in school projects. No advertisement-filled pages with pop-up windows or inappropriate links here. A friendly license allows teachers and students to use up to 50 items in a single, non-commercial project without further permission. http://etc.usf.edu/clipart/i/banner.jpg http://etc.usf.edu/clipart/ This website is CoolIris enabled! You can use the CoolIris browser plugin to view the images on this site in an interactive 3D wall.<br><br><br><br> http://www.cooliris.com/ "Adder's tongue fern (Ophioglossum vulgatum L.). R, runner or stolon." -Gager, 1916... http://etc.usf.edu/clipart/50600/50658/50658_adderstongue.htm Ophioglossum vulgatum, or Southern Adderstongue is a fern-like plant commonly growing in sand dunes.... http://etc.usf.edu/clipart/53800/53852/53852_s_adderstong.htm "The elastic ring which surrounds the spore case."-Whitney, 1902... http://etc.usf.edu/clipart/14700/14796/annuli_14796.htm 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... http://etc.usf.edu/clipart/61300/61383/61383_antheridium.htm 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... http://etc.usf.edu/clipart/61300/61387/61387_archegonium.htm An illustration of a pinnule of aspidium showing veins and sori.... http://etc.usf.edu/clipart/61300/61395/61395_aspidium.htm An illustration of a pinnule of aspenium showing veins and sori.... http://etc.usf.edu/clipart/61300/61392/61392_asplenium.htm "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... http://etc.usf.edu/clipart/73000/73083/73083_bracken.htm 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 ... http://etc.usf.edu/clipart/69300/69310/69310_fossils_fern.htm 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 ... http://etc.usf.edu/clipart/69300/69311/69311_fossils_fern.htm 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 ... http://etc.usf.edu/clipart/69300/69312/69312_fossils_fern.htm Scalariform ducts of a Fern, torn into a band.... http://etc.usf.edu/clipart/30900/30994/ducts_30994.htm "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... http://etc.usf.edu/clipart/62500/62563/62563_feloher.htm A common fern plant.... http://etc.usf.edu/clipart/23500/23563/fern_23563.htm A common fern plant.... http://etc.usf.edu/clipart/23500/23564/fern_23564.htm "A, Upper epidermis; B, lower epidermis, of the fern, Drynaria meyeniana." -Gager, 1916... http://etc.usf.edu/clipart/50600/50654/50654_fern_epiderm.htm "Fossil Fern (Neuropteris)." -Taylor, 1904... http://etc.usf.edu/clipart/49200/49285/49285_fern_fossil.htm A fossil fern (Pterophyllum) in a piece of jet.... http://etc.usf.edu/clipart/49300/49319/49319_fern_fossil.htm "Phlebopteris&ndash;a characteristic Oolite fern." -Taylor, 1904... http://etc.usf.edu/clipart/49300/49337/49337_fern_fossil.htm "Frond of fern bearing sporangia in sori."&mdash;Finley, 1917... http://etc.usf.edu/clipart/35300/35318/fern_frond_35318.htm "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... http://etc.usf.edu/clipart/50600/50656/50656_fern_germin.htm "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... http://etc.usf.edu/clipart/46600/46615/46615_fern_growth.htm "Fern leaves, showing various degrees of subdivision or branching of the blade. A, Phyllitis; B, Polypodium; C, Pteris; D, Adiantum." -Gager, 1916... http://etc.usf.edu/clipart/50600/50655/50655_fern_leaves.htm "Fern prothallus; cross-sections showing antheridia (an), sperms (sp), and rhizoids (rh). Below at the right is a sperm (sp) greatly enlarged." -Gager, 1916... http://etc.usf.edu/clipart/50600/50657/50657_fern_proth.htm "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... http://etc.usf.edu/clipart/46600/46616/46616_fern_repro.htm