Davallia (deersfoot fern, hare's foot fern, shinobu fern, rabbit foot fern, ball fern) is a genus of about 40 species of fern. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is the only genus in the family Davalliaceae, which is placed in the suborder Polypodiineae, order Polypodiales. Alternatively, the family may be placed in a very broadly defined family Polypodiaceae sensu lato as the subfamily Davallioideae. The family is sister to the largest family of ferns, Polypodiaceae, and shares some morphological characters with it. Species are epiphytic ferns, with fronds arising from long aerial rhizomes which grow on and over thick bark on trees or on rock crevices. Usually epiphytic or epipetric. Rhizomes dictyostelic, dorsiventral, densely scaly. Stipes articulate at base. Phyllopodia short. veins free. Sporangium stalk 3-rowed. Annulus vertical. Spores monolete. Give credit where credit is due: Wikipedia 2020
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