FIGURE 21 in A taxonomic monograph of the fern genus Ctenitis (Dryopteridaceae) in South America

FIGURE 21. Some morphological characters of Ctenitis from South America. A–B: Ctenitis laetevirens (Schimitt 561, BHCB). A: abaxial surface of portion of pinna. B: abaxial costa scale. C–F: Ctenitis microchlaena (unknown s.n., UC). C: abaxial surface of a portion of rachis and two basal basiscopic segments of a medial pinna. D: abaxial costa scale. E: abaxial surface of a pinna, showing indument. F: sorus with indusium. Scale bars A, B, D e E = 1 mm; C = 1 cm; F = 0.5 mm