FIGURE 2 in A new variety of fern from Borneo, Sphaerostephanos unitus var. dimorphophylla (Thelypteridaceae)

FIGURE 2. Morphology of Sphaerostephanos unitus var. dimorphophylla T. Hayashi, M. Suleiman, H. Okada & Tsukaya, var. nov. (A) sterile frond and rhizome. (B) fertile frond. (C) reduced lateral pinna of sterile frond. (D) protuberance of reduced pinna of fertile frond. (E) adaxial surface of base of lateral pinna of sterile frond. (F) abaxial surface of base of lateral pinna of sterile frond. (G) abaxial surface of base of lateral pinna of fertile frond. (H) indusium. (I) scale on base of stipe. Size bars: (A, B) = 5 cm, (E, F) = 3 mm, (C, D, G, I) = 1 mm, (H) = 100 μm.