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FIGURE 1 in Taxonomic, nomenclatural, and distribution notes on Thymus dreatensis (Nepetoideae, Lamiaceae) and related taxa endemic to North Africa

FIGURE 1. Thymus dreatensis in Tunisia. A. Habit and habitat within Kroumirian rocky slopes B. Specimen in blooming period with prostrate stems, rooting on nodes. Photographs by R. El Mokni.

FIGURE 2 in Taxonomic, nomenclatural, and distribution notes on Thymus dreatensis (Nepetoideae, Lamiaceae) and related taxa endemic to North Africa

FIGURE 2. Thymus dreatensis in Tunisia A. Details of cauline leaves, shape and hairs. B. Erect flowering branches with inflorescences. C. Inflorescence with details of flowers D. Infructescence in fruiting period with ciliate calyx. Photographs by R. El Mokni.

FIGURE 1. O in Onosma serpentinica (Boraginaceae), a new serpentine endemic species from the South-West Anatolia, Türkiye

FIGURE 1. O. serpentinica in its type locality, photograph by Hasan Yıldırım (a-habit; b-flowers; c- and d- upper and lower surfaces of leaves; e-calyx)

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.

FIGURE 13 in Evidence on the origin of Narcissus ×weickertii (Amaryllidaceae), an endemic daffodil of the SW Iberian Peninsula

FIGURE 13. Bayesian phylogenetic tree of Narcissus reconstructed using plastid (trnL–F and ndhF) sequences. Numbers on the nodes show posterior probabilities (PP) from the Bayesian analysis under the GTR+U+I model of DNA selected by jModelTest (Posada 2008). Blue (Section Tazettae) and orange (Section Jonquilla) highlighted clades represent the position of the two parentals and the hybrid. The population numbers correspond to those in Appendix S1 from Santos-Gally et al. (2012), except for N. papyraceus 1, N. gaditanus 1 and N. ×weickertii 1 (all individuals), which correspond to the El Lancón population.

FIGURE 10 in Evidence on the origin of Narcissus ×weickertii (Amaryllidaceae), an endemic daffodil of the SW Iberian Peninsula

FIGURE 10. In situ hybridization results. A–B: Genomic in situ hybridization (GISH) in three metaphase chromosome spreads of N. ×weickertii (2n= 2x = 18) using DNA from N. papyraceus (detected with biotin) and N. gaditanus (detected with digoxigenin), respectively, as probes. A, GISH in a cell with chromosomes counterstained with DAPI (11 fuchsia-coloured chromosomes from N. papyraceus and 7 blue coloured chromosomes from N. gaditanus); B, GISH in a cell with chromosomes not counterstained with DAPI (11 orange-coloured chromosomes from N. papyraceus and 7 green coloured chromosomes from N. gaditanus. C: Fluorescence in situ hybridization (FISH) in a metaphase cell of N. ×weickertii using pTa71 (18S-5.8S-26S rDNA) as probe (detected with biotin), showing NOR regions in three chromosomes on the left (note that the two red marks up on the right correspond to chromosomes of a different cell). D: Two karyograms obtained from two different cells of N. × weickertii, distinguishing chromosomes of N. papyraceus and N. gaditanus; above, cell treated with GISH (as indicated in A); below, cell treated with FISH (as indicated in C) after GISH followed by reprobing. Scale bar: 10 µm.

FIGURE 6 in Evidence on the origin of Narcissus ×weickertii (Amaryllidaceae), an endemic daffodil of the SW Iberian Peninsula

FIGURE 6. PCA Ordination of characters in the two first principal components. See Table 1 for abbreviations of characters. Variance explained for each component is included in parentheses.

FIGURE 2 in Evidence on the origin of Narcissus ×weickertii (Amaryllidaceae), an endemic daffodil of the SW Iberian Peninsula

FIGURE 2. Flower characters used. On the left (top view): 1, perigone diameter; 2 and 3, length of the inner and outer tepal lobes, respectively; 4 and 5, width of the inner and outer tepal lobes, respectively; 6, non-overlapping part of the tepal lobe. On the right (lateral view): Measurements inside the dissected flower in a long- (left) and a short- (right) styled flowers: 1, perigone tube; 2 and 3, minimum and maximum width of the perigone tube, respectively; 4, corona height; 5, corona base diameter; 6, corona top diameter; 7 and 8, upper and lower stamen filaments length, respectively; 9, style length.

FIGURE 5 in Evidence on the origin of Narcissus ×weickertii (Amaryllidaceae), an endemic daffodil of the SW Iberian Peninsula

FIGURE 5. Multivariate ordination of plants based on the first and second components derived from the principal component analysis (PCA) applied to 16 quantitative characters. Variance explained for each component is included in parentheses. N. papyraceus: black symbols; N. ×weickertii: grey symbols; N. gaditanus: white symbols. Squares: Lancón population; circles: Marijata population; diamonds: Borreras population.

FIGURE 4. A–C in Evidence on the origin of Narcissus ×weickertii (Amaryllidaceae), an endemic daffodil of the SW Iberian Peninsula

FIGURE 4. A–C. Inflorescences: A, N. papyraceus: El Lancón; B, N. ×weickertii: El Lancón; C, N. gaditanus: Marijata. D. Comparison among flowers of N. papyraceus (on the left), N. ×weickertii (center) and N. gaditanus (on the right). E–G. Flower colour variability among different plants of N. ×weickertii from El Lancón. Scales: 15 mm (Fig. A), 10 mm (Fig. B), 6 mm (Fig. C), 10 mm (Figs. E–G). Photos by: Z.Díaz Lifante.

FIGURE 1 in Evidence on the origin of Narcissus ×weickertii (Amaryllidaceae), an endemic daffodil of the SW Iberian Peninsula

FIGURE 1. Geographic distribution in the Iberian Peninsula and North Morocco of N. papyraceus (grey area) and N. gaditanus (black dots). Inserted box includes the geographic location of the populations here studied, except for population 6 (Motril), which is in the large map.

FIGURE 3 in Evidence on the origin of Narcissus ×weickertii (Amaryllidaceae), an endemic daffodil of the SW Iberian Peninsula

FIGURE 3. Microphotographs of leaf and scape sections. A–F. transversal microsections of the leaf central region. G–I. transversal microsections of the scape, showing presence (G, H) or absence (I) of lateral edges. A, B, G: N. papyraceus; C, D, I: N. gaditanus; E, F, H: N. ×weickertii. Populations: A, D, Marijata; B and G, Villanueva Castillejos; C, E, F, H, I: El Lancón. Scale bar: A–F, 500 µm; G–I, 400 µm.

FIGURE 8. Karyograms. A–B, N in Evidence on the origin of Narcissus ×weickertii (Amaryllidaceae), an endemic daffodil of the SW Iberian Peninsula

FIGURE 8. Karyograms. A–B, N. papyraceus; C–D, N. ×weickertii; E–F, N. gaditanus. Populations: A: Villanueva de Castillejos. B, C, D, F: El Lancón; E: El Portil. Scale bar: 10 µm.

FIGURE 9. Ideograms for N in Evidence on the origin of Narcissus ×weickertii (Amaryllidaceae), an endemic daffodil of the SW Iberian Peninsula

FIGURE 9. Ideograms for N. papyraceus (El Lancón population), N. gaditanus (El Rompido population) and N. ×weickertii (El Lancón population). A, ideograms constructed with the absolute length of chromosomes; mean values (in µm) and standard deviations are represented for the length of each chromosome arm. B, ideograms constructed from the normalized values for lengths of chromosomes; chromosomes of N. papyraceus (genome P, in dark grey shaded) are interspersed with those of N. ×weickertii (light grey shaded) putative of the genome P (n= 11); chromosomes of N. gaditanus (genome G, in white) are interspersed with those of N. ×weickertii (light grey shaded) putative of the genome G (n= 7).

FIGURE 7 in Evidence on the origin of Narcissus ×weickertii (Amaryllidaceae), an endemic daffodil of the SW Iberian Peninsula

FIGURE 7. Microphotographs of cut sections of leaf and scape. A–C. Leaf margin. D–F. Leaf parenchyma abaxial. G–I. Scape epidermis, parenchyma and collenchyma. A, D, G: N. papyraceus; B, E, H: N. ×weickertii; C, F, I: N. gaditanus. Populations: A, C, G, I, Marijata; B, E, F, H, El Lancón; D, Villanueva Castillejos. Scale bars: 100 µm.

FIGURE 20, 21 in Light and Scanning Observations on a Denticula species reported from South Africa and endemism of the diatom genus Tetralunata (Rhopalodiales, Bacillariophyceae)

FIGURE 20, 21. Tetralunata schoemanii, sp. nov. Septum, cross section. Fig. 20. Septum only. Fig. 21. Valve with costa and septum overlaying the valve. Scale bars = 5 µm.

FIGURES 16–19 in Light and Scanning Observations on a Denticula species reported from South Africa and endemism of the diatom genus Tetralunata (Rhopalodiales, Bacillariophyceae)

FIGURES 16–19. Tetralunata schoemanii, sp. nov. Scanning electron microscopy. Internal views. Fig. 16. Valve view with costae evident. Scale bar = 10 µm. Fig. 17. Valve with septum overlaying valve. Scale bar = 5 µm. Fig. 18. Septum. Scale bar = 5 µm. Fig. 19. High magnification view of the center of the valve showing proximal raphe ends. Scale bar = 1 µm.

FIGURES 1–10 in Light and Scanning Observations on a Denticula species reported from South Africa and endemism of the diatom genus Tetralunata (Rhopalodiales, Bacillariophyceae)

FIGURES 1–10. Tetralunata schoemanii, sp. nov. Light Microscopy. Figs 1–8. Size diminution series, valve views, from Holotype slide. Fig. 9. Septa. Fig. 10. Frustule in girdle view showing Häutung valve. Scale bar = 10 µm for all specimens.

FIGURES 11–15 in Light and Scanning Observations on a Denticula species reported from South Africa and endemism of the diatom genus Tetralunata (Rhopalodiales, Bacillariophyceae)

FIGURES 11–15. Tetralunata schoemanii, sp. nov. Scanning electron microscopy. Valve exterior. Figures 11, 12. Valve view of entire cell. Scale bars = 5 µm. Figs 13, 14. Higher magnification view of volae occluding areolae, on valve face and mantle, respectively. Scale bars = 1.5 µm. Fig. 15. Girdle view showing the girdle bands near the valve apex. Scale bar = 2.5 µm.