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| | Aspleniaceae in Flora of North America @ efloras.org |
 | | The scales consist of cells with dark, thick, radial walls and clear, thin, tangential walls, giving the scales a clathrate (latticelike) appearance reminiscent of lead moldings between plates of stained glass. |
 | | As construed here, Aspleniaceae comprise a single, huge, extremely diverse genus, Asplenium. |
 | | A satisfactory taxonomic division into subgenera or satellite genera has not been possible because of the absence of any significant gaps. |
| www.efloras.org /florataxon.aspx?flora_id=1&taxon_id=10072 (519 words) |
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