FIGURE 6 in Pollen morphology of selected taxa of Valeriana (Caprifoliaceae): taxonomic and evolutionary implications

FIGURE 6. Pollen grains of Valeriana (LM). A–D. V. angustifolia. E–H. V. stolonifera. I–L. V. grossheimii. M–P. V. rossica. Q–T. V. tuberosa. U–X. V. alliariifolia. A, B, E, F, I, J, M, N, Q, R, U, V. Equatorial view. C, D, G, H, K, L, O, P, S, T, W, X. Polar view. Scale bars: 10 µm.