FIGURES 57–71 in A biosystematic study of Euphorbia subgenus Chamaesyce (Euphorbiaceae) in Iran

FIGURES 57–71. SEM of pollen grains in studied species from subg. Chamaesyce sects. Anisophyllum and Cheirolepidium and subg. Esula. Figs. 57–59: E. nutans, Fig 57: Subpolar view ×3000, Fig 58: Equatorial view ×3000, Fig 59: Exine structure ×7500. Figs. 60–62: E. humifusa, Fig 60: Subpolar view ×3000, Fig 61: Equatorial view ×3000, Fig 62: Exine structure ×7500. Figs. 63-65: E. petiolata (sect. Cheirolepidium), Fig 63: Polar view ×2000, Fig 64: Equatorial view ×2000, Fig 65: Exine structure ×7500. Figs. 66–68: E. peplus (subg. Esula), Fig 66: Polar view ×3000, Fig 67: Equatorial view ×3000, Fig 68: Exine structure ×7500. Figs. 69–71: E. helioscopia (subg. Esula), Fig 69: Polar view ×3000, Fig 70: Equatorial view ×2000, Fig 71: Exine structure ×7500.