FIGURE 3 in A natural intergeneric hybrid of Gesneriaceae from Brazil

FIGURE 3. Photomicrographs and electron micrographs (SEM, TEM) of the pollen grains of hybrid (Goydirola) and parental species (Goyazia petraea and Mandirola hirsuta) studied. (A–F) Goyazia petraea [A–F = 1061], (G–M) Goydirola, (N–T) Mandirola hirsuta [N = 1064; O–P, R–S and T = 1068; Q = 1066]. (A, G and N) polar view with emphasis on the amb, (D, K and Q) equatorial view with emphasis on the apertures, (B–C, H–I and O–P) ornamentation in high and low focus on the apocolpium, (E–F, L–M and R–S) ornamentation in high and low focus on the mesocolpium, (J) ornamentation on the mesocolpium (SEM) with emphasis on the exine ultrastructure (TEM), (T) ornamentation on the mesocolpium (SEM). Scale bars: 2 µm = J (TEM); 5 µm = other images. Legends: c = columella, i = intine, n1 = foot layer, n2 = endexine, t = tectum.