FIGURE 2. Ophioglossum isanense S. Petchsri, Li in Ophioglossum isanense sp. nov. (Ophioglossaceae, Pteridophyta) from Thailand

FIGURE 2. Ophioglossum isanense S. Petchsri, Li-Bing Zhang & T. Jaruwattanaphan, sp. nov.—A. Plants in habitat from Phu Phan National Park, Sakon Nakhon.—B. Plants in habitat from Phu Pha Lek National Park, Sakon Nakhon.—C. Habit.—D. Persistent leaf sheath at bases of common stalk (arrow head).—E. Adaxial side of trophophyll.—F. Fertile stalk.—G, H. SEM photomicrographs of spores.—G. Distal view.—H. Proximal view (All photos by P. Limpanasittichai & S. Chokrassameehirun). Scale bars: A–C: 1 cm, D–F: 5 mm.