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Fig. 6. Parallelism of typical and deviant pollen forms of some taxa of angiosperms. a–c – Krameria secundiflora DC.; g – K. grayi Rose; d–g – K. cistoides Hook.; h – K. ramosissima S. Wats; and – K. erecta Willd. ex Shultes; j – K. parviflora Benth (Krameriaceae); l – Acer maybei Maxim. (Sapindaceae); m – Eupomatia laurina R. Br. (Eupomatiaceae); n – Scutallaria dubia Taliev et Schirj. (Lamiaceae); o – Acer davidii Franch. (Sapindaceae); n – Monstera deliciosa Liebm. (Araceae); p – Pedicularis peduncularis Popov (Scrophulariaceae); c – Alsodeia echinocarpa Korth. (Violaceae); t, y – Acanthosyris falcata Griseb. (Santalaceae); f – Euphorbia leptocaula Boiss.; x – E. saravschanica Regel (Euphorbiaceae); c – Eugenia luzonensis Snerr. (Myrtaceae). a–i, m, p, r – typical pollen grains (marked with the letter T in the upper right corner); k, l, n, o, s–c – atypical pollen forms. a–c – 3-colpate form D; g–zh – acolpate-3-ore form D; z, i – acolpate, endoaperture of form A; k – acolpate, endoaperture of form Zh (tennis ball form); z, i, m–r – form A; k, l – form Zh (tennis ball form); s–c – form E (s, t – right variant; x, c – left variant). For letter designations of forms, see Fig. 5. a–c – typical pollen grains of p. Krameria (Krameriaceae) with exoapertures; g–f – without exoapertures. a, g, e, h, c, t, h, c – SM; b, c, e, f, g–r, u, f – SEM. Upper and lower focus (SM) are shown for each pollen grain. Scale bars – 10 µm. |