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Example(s): Example sentences from FNA :  Distinguished from other subgenera by the combination of evergreen leaves, pinnae entire or merely serrate, cross-veins regularly uniting in pairs to form parallel rows of usually more than 10 areoles between costa and pinna margin, areoles each with a single excurrent, usually free, vein produced at the point of union of the cross-veins, and elongate, exindusiate sori.  Distinguished from other subgenera by the combination of evergreen leaves, broadly adnate, shallowly lobed distal pinnae, elongate exindusiate sori, and sporangial capsules bearing hairs.
- Categorical Glossary for the Flora of North America Project, by Robert W. Kiger and Duncan M. Porter. 2001. Hunt Institute for Botanical Documentation.