FIGURE 11. A–D in Evidence on the origin of Narcissus ×weickertii (Amaryllidaceae), an endemic daffodil of the SW Iberian Peninsula

FIGURE 11. A–D, Pollen grains of three plants of N. ×weickertii (El Lancón). A: Four unstained pollen grains, two empty median sized, and two viable (with cytoplasm, one median and one huge sized); scale bar: 25 µm. B: Fuchsin-stained viable pollen grain, with cytoplasm extruding in the poles; scale bar: 10 µm. C: Fuchsin-stained pollen grains (several median sized grains and two viable huge sized grains); scale bar: 50 µm. D: Fuchsin-stained pollen grains (one huge sized viable pollen grain and other median sized pollen grains); scale bar: 25 µm. E: Detail of the ornamentation of the exine: N. papyraceus (top), N. ×weickertii (middle), N. gaditanus (bottom); scale bar: 5µm.