Key to Asplenium serratum complex from Atlantic Forest 1. Veins spreading at 35°–45° from the midrib ...................................................................................................... Asplenium angustum - Veins spreading at 60°–75° from the midrib ......................................................................................................................................2 2. Lamina margins dentate; stem scales 3.4–4.6 mm long, dark brownish ...................................................... Asplenium stuebelianum - Lamina margins entire, crenulate or serrate; stem scales over 7 mm long, light brownish to red .....................................................3 3. Lamina margins regularly serrate or crenate; proliferous apex absent; external cells of the stem scales with thickened walls.......... ............................................................................................................................................................................. Asplenium serratum - Lamina margins irregular, entire to slightly crenate; proliferous apex present; cells of the stem scales with walls regularly thickened............................................................................................................................................................ Asplenium coronatum

Published as part of Reis, Atiles, Lino, Vanessa, Mynssen, Claudine Massi & Sylvestre, Lana Da Silva, 2022, Asplenium coronatum (Aspleniaceae), a new fern species from the Brazilian Atlantic Forest, pp. 185-190 in Phytotaxa 574 (2) on page 189, DOI: 10.11646/phytotaxa.574.2.8, http://zenodo.org/record/7380912