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570 results for “Euphorbia”
FIGURE 4 in Taxonomic changes and new species in Malagasy Euphorbia (Euphorbiaceae)
FIGURE 4. Euphorbia atimovatae in the Lavanono area, young plant showing the thick rootstock and young stems. Credits: T.Haevermans.
FIGURE. Euphorbia agatheae in the type locality (Ifaty, north of Toliary). A. habit; B. detail of the bark. Credits: T.Haevermans (A and B). in Taxonomic changes and new species in Malagasy Euphorbia (Euphorbiaceae)
FIGURE. Euphorbia agatheae in the type locality (Ifaty, north of Toliary). A. habit; B. detail of the bark. Credits: T.Haevermans (A and B).
Geographic patterns in pollen production in Euphorbia tithymaloides
<p>In this study We examine investment in male function in the context of geography and floral morphology in the plant ring species Euphorbia tithymaloides, which colonized the Caribbean from Mexico/Guatemala along two fronts that roughly correspond to the Greater and the Lesser Antilles and that meet in the vicinity of the Anegada Passage.</p> <p>Our results on investment in pollen relative to ovule production are consistent with E. tithymaloides relying on pollinators for reproduction across its range in the Caribbean. We document a geographic pattern of reduction in anther number and pollen:ovule ratios in populations of E. tithymaloides towards the Anegada Passage, which is consistent with a possible geographic transition towards a mixed breeding system where selfing has increased importance in this area where its two expansion fronts meet. The reduction in pollen production is correlated with inflorescence morphology, which converges to relatively shorter cyathia towards the Anegada Passage along both fronts. We discuss alternative scenarios and potential drivers of the patterns we document.</p> <p>The linked datasets consist of:</p> <p>1. Georeferenced pollen counts of Euphorbia tithymaloides.</p> <p>2. Georeferenced measurements of cyathia of Euphorbia tithymaloides.</p> <p>3. Images from where cyathial measurements were derived.</p>
FIGURE 2. Euphorbia berryi. A. Branchlets. B. Flowering branchlet. C. Leaf apex. D. Seeds. E. Cyathium and leaves. F. Cyathium. G. Stipules. All photos from E.L in Euphorbia berryi: a narrowly endemic Brazilian species
FIGURE 2. Euphorbia berryi. A. Branchlets. B. Flowering branchlet. C. Leaf apex. D. Seeds. E. Cyathium and leaves. F. Cyathium. G. Stipules. All photos from E.L. Taylor et al. E1207 (F).
FIGURE 7 in Typification issues in Euphorbia section Plagianthae (Euphorbiaceae)
FIGURE 7. Epitype of Euphorbia plagiantha Drake. Réserves Naturelles (coll. Rakotoson) 10062RN (P05543011). Credit: Muséum national d'histoire naturelle, Paris.
FIGURE 8 in Typification issues in Euphorbia section Plagianthae (Euphorbiaceae)
FIGURE 8. Lectotype of Euphorbia fiha Decary, Decary s.n. (P00224809). Credit: Muséum national d'histoire naturelle, Paris.
FIGURE 6 in Typification issues in Euphorbia section Plagianthae (Euphorbiaceae)
FIGURE 6. Holotype of Euphorbia plagiantha Drake, Grandidier s.n. (P00078077). Credit: Muséum national d'histoire naturelle, Paris.
FIGURE 5 in Typification issues in Euphorbia section Plagianthae (Euphorbiaceae)
FIGURE 5. Lectotype of Euphorbia salota Leandri, Humbert 14190 (P00078097). Credit: Muséum national d'histoire naturelle, Paris.
FIGURE 2. Euphorbia plagiantha. A in Typification issues in Euphorbia section Plagianthae (Euphorbiaceae)
FIGURE 2. Euphorbia plagiantha. A. trunk with peeling bark; B. adult plant habit. Credits: P.E.Berry.
FIGURE 4. Euphorbia salota. A in Typification issues in Euphorbia section Plagianthae (Euphorbiaceae)
FIGURE 4. Euphorbia salota. A. young fruit; B. detail of the cyathium with leaf-like cyathophylls. Credit: T.Haevermans.
FIGURE 1. Euphorbia plagiantha. A in Typification issues in Euphorbia section Plagianthae (Euphorbiaceae)
FIGURE 1. Euphorbia plagiantha. A. branches with capsules; B. detail of the bark. Credits: T.Haevermans.
FIGURE 9 in Typification issues in Euphorbia section Plagianthae (Euphorbiaceae)
FIGURE 9. Distribution map of Euphorbia plagiantha (red) and Euphorbia salota (green), both endemic to Madagascar.
FIGURE 3 in Typification issues in Euphorbia section Plagianthae (Euphorbiaceae)
FIGURE 3. View of the habitat of Euphorbia plagiantha near Fort-Dauphin, in South-West Madagascar. Credit: P.E.Berry.
FIGURE. Selected species from the flora of Quiçama National Park. A. Adansonia digitata. B. Euphorbia candelabrum. C. Acacia welwitschii. D. Hyphaene guineensis. E. Rhizophora racemosa. F. Guibourtia carrissoana var. gossweileri. G. Tessmannia camoneana. H. Sterculia setigera. I. Carissa spinarum. J. Boscia urens. K. Maerua angolensis. L. Grewia villosa. M. Sesuvium crithmoides. N. Aloe zebrina. O. Barleria elegans. P. Setaria welwitschii. (Photographs by the authors). in An annotated checklist of the vascular flora of Quiçama National Park, Angola
FIGURE. Selected species from the flora of Quiçama National Park. A. Adansonia digitata. B. Euphorbia candelabrum. C. Acacia welwitschii. D. Hyphaene guineensis. E. Rhizophora racemosa. F. Guibourtia carrissoana var. gossweileri. G. Tessmannia camoneana. H. Sterculia setigera. I. Carissa spinarum. J. Boscia urens. K. Maerua angolensis. L. Grewia villosa. M. Sesuvium crithmoides. N. Aloe zebrina. O. Barleria elegans. P. Setaria welwitschii. (Photographs by the authors).
Figure 2 in A new record of Euphorbia riinae (Euphorbiaceae) for Brazil
Figure 2: Distribution map of E. riinae (red diamond) and E. gymnoclada (green diamond), highlighting the new record of E. riinae in Brazil (yellow star).
FIGURE 4. Antennae. A, D in Three new South American species of genus Aphis (Hemiptera: Aphididae) living on species of Euphorbia (Euphorbiaceae)
FIGURE 4. Antennae. A, D, Aphis tehuelchis Nieto Nafría & López Ciruelos, sp. n.; B, E, Aphis maulensis Mier Durante & García-Tejero, sp. n.; C, F–H, Aphis eucollinae López Ciruelos & Ortego, sp. n.; A–C, apterous viviparous females; D–F, alate viviparous females; G, oviparous female; H, male.
FIGURE 5. Siphunculi and caudas. A, D, I, L in Three new South American species of genus Aphis (Hemiptera: Aphididae) living on species of Euphorbia (Euphorbiaceae)
FIGURE 5. Siphunculi and caudas. A, D, I, L, Aphis tehuelchis Nieto Nafría & López Ciruelos, sp. n.; B, E, J, M, Aphis maulensis Mier Durante & García-Tejero, sp. n.; C, F–H, K, N–P, Aphis eucollinae López Ciruelos & Ortego, sp. n.; A–C, I–K, apterous viviparous females; D–F, L–N, alate viviparous females; G, O, oviparous female; H, P, male.
FIGURE 3. A–E in Three new South American species of genus Aphis (Hemiptera: Aphididae) living on species of Euphorbia (Euphorbiaceae)
FIGURE 3. A–E, Aphis eucollinae López Ciruelos & Ortego, sp. n.; A, apterous viviparous females, habitus; B, variation of sclerotization and pigmentation; C, alate viviparous females, abdomen (dorsal view); D, oviparous female, hind tibia; E, apterous male.
FIGURE 2. A–D in Three new South American species of genus Aphis (Hemiptera: Aphididae) living on species of Euphorbia (Euphorbiaceae)
FIGURE 2. A–D, Aphis tehuelchis Nieto Nafría & López Ciruelos, sp. n.; E, F, Aphis maulensis Mier Durante & García- Tejero, sp. n.; A, E, apterous viviparous females, habitus; B, C, variations of sclerotization and pigmentation; D, F, alate viviparous females, abdomen (dorsal view).
FIGURE 1 in Three new South American species of genus Aphis (Hemiptera: Aphididae) living on species of Euphorbia (Euphorbiaceae)
FIGURE 1. Bivariate plot of PC1 versus PC2 from Principal Components analysis of 33 absolute quantitative characters of apterous viviparous females of Aphis tehuelchis Nieto Nafría & López Ciruelos, sp. n., Aphis maulensis Mier Durante & García-Tejero, sp. n. and Aphis eucollinae López Ciruelos & Ortego, sp. n.
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