FIGURE 2 in Isoetes shangrilaensis, a new species of Isoetes from Hengduan mountain region of Shangri-la, Yunnan

FIGURE 2. Spore morphology from an individual of population GH of Isoetes hypsophila. A–D: Megaspore. A, polar view of proximal surface showing laevigate with some scurfy scales. B, equatorial view of proximal showing equatorial and radial ridges smooth, narrow and of even height and width. C, distal view showing laevigate surface. D, details of the distal surface showing dense coverage of very small fibrils. E–F: Microspore. E, proximal view showing baculate surface densely covered by low, thick tubercules, proximal ridge rugulate with a semihemispherical swelling perpendicular to it. F, distal view showing surface bacculate to rugulate. Scale bars: A, B, C, 200μm; D, 50μm; E-F, 10μm.