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Ophioglossaceae in Flora of North America @ efloras.org (Site not responding. Last check: 2007-10-08) |
 | | Ophioglossaceae comprise two clearly defined subfamilies, Botrychioideae and Ophioglossoideae, which are sometimes recognized as distinct families. |
 | | Ophioglossaceae may be only distantly related to the ferns and more closely related to Marattiales and certain seedplants, especially Cycadales, in such characteristics as stelar type, cork cambium, dilated leaf bases, conduplicate vernation, intercalary leaf growth, collateral leaf traces, circular-bordered pits, eusporangia, massive gametophytes, sunken archegonia, and presence in some species of endoscopic embryos. |
 | | Blades mostly pinnately divided or lobed; veins free; margins entire to dentate to lacerate; sporangial clusters pinnately branched, sporangia sessile or terminating short stalks. |
| www.efloras.org /florataxon.aspx?flora_id=1&taxon_id=10634 (355 words) |
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