FIGURE 6 in Morphology and anatomy of the exine in Saxifraga (Saxifragaceae)

FIGURE 6. TEM pictures of Type 4.1 (a), Type 4.2 (b) and Type 4.3 (c–h) exines. scale bar 1 μm. a) S. rotundifolia; b) S. granulifera; c) S. mutata; d) S. rupicola; e) S. hirsuta; f) S. androsacea, showing discontinuous primary tectum; g) S. wahlenbegii, showing discontinuous primary tectum; h) S. tridactylites, showing obscure secondary columellae.