from The Century Dictionary and Cyclopedia

  • n. A genus of tropical ferns of varying habit, with entire, pinnatifid or pinnate fronds, similar in most respects to Polypodium, and differing mainly in having irregularly anastomosing venation, the large roundish sori often deeply sunk in pustulate depressions and borne in one or more series, generally upon the free included veinlets which are commonly recurved.


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