FIGURE 2 in A giant among the giants: Arthrocereus grandiflorus (Cactaceae, Cactoideae), a new species from the Brazilian Cerrado

FIGURE 2. Photomicrographs and electromicrographs of pollen grains of Arthrocereus grandiflorus. Polar view: A. optical section (LM), B. general aspect (SEM); Equatorial view: C. optical section (SEM), D. general aspect (SEM); E. ornamentation detail (SEM). Scale bars: A,C: 5 μm; B,D: 10 μm; E: 2 μm.