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33 results for “leaf lobing”
Text-fig. 5. Lauraceae, Platanaceae, Cercidiphyllaceae/Trochodendraceae. a: Sassafras hespera with 2 lobes, UAPC-ALTA S6556. b: cf. Lindera leaf. UAPC-ALTA S 67687. c: Macginitiea gracilis, UAPC-ALTA S 25748. d: Macginicarpa capitulum showing florets grouped in fives, UAPC-ALTA S 59507. e, g: Platanaceous fruitlets with basal tufts of dispersal hairs, UAPC-ALTA S 25748B, S S275238. f: Macginicarpa infructesence with five attached capitula, UAPC-ALTA S 59507A. h: Leaf similar to Populus and Trochodendroides, BBM-PAL-P000010. i: Leaf similar to Populus and Trochodendroides, UAPC-ALTA S 59516. j: cf. Trochodendroides, UAPC-ALTA S 59516. k: Jenkinsella infructesence; Figured in Penhallow 1908, plate 33. l: cf. Leaf similar to Cercidiphyllum and Trochodendroides, BBM-PAL-P000010. Scale bars: a–c, f, h, j, l = 2 cm, d, i, k = 1 cm, e, g = 0.5 cm. in The Early Eocene Flora Of Horsefly, British Columbia, Canada And Its Phytogeographic Significance
Text-fig. 5. Lauraceae, Platanaceae, Cercidiphyllaceae/Trochodendraceae. a: Sassafras hespera with 2 lobes, UAPC-ALTA S6556. b: cf. Lindera leaf. UAPC-ALTA S 67687. c: Macginitiea gracilis, UAPC-ALTA S 25748. d: Macginicarpa capitulum showing florets grouped in fives, UAPC-ALTA S 59507. e, g: Platanaceous fruitlets with basal tufts of dispersal hairs, UAPC-ALTA S 25748B, S S275238. f: Macginicarpa infructesence with five attached capitula, UAPC-ALTA S 59507A. h: Leaf similar to Populus and Trochodendroides, BBM-PAL-P000010. i: Leaf similar to Populus and Trochodendroides, UAPC-ALTA S 59516. j: cf. Trochodendroides, UAPC-ALTA S 59516. k: Jenkinsella infructesence; Figured in Penhallow 1908, plate 33. l: cf. Leaf similar to Cercidiphyllum and Trochodendroides, BBM-PAL-P000010. Scale bars: a–c, f, h, j, l = 2 cm, d, i, k = 1 cm, e, g = 0.5 cm.
Increases in vein length compensate for leaf area lost to lobing in grapevine
<p><span></span></p> <p>There is considerable variation in leaf lobing and leaf size, including among grapevines, some of the most well-studied leaves. We examined the relationship between leaf lobing and leaf size across grapevine populations which varied in extent of leaf lobing. We used homologous landmarking techniques to measure 2,632 leaves across two years in 476 unique, genetically distinct grapevines from 5 biparental crosses which vary primarily in the extent of lobing. We determined to what extent leaf area could explain variation in lobing, vein length, and vein to blade ratio. Although lobing was the primary source of variation in shape across the leaves we measured, leaf area varied only slightly as a function of lobing. Rather, leaf area increases as a function of total major vein length, total branching vein length, and decreases as a function of vein to blade ratio. These relationships are stronger for more highly lobed leaves, with the residuals for each model differing as a function of distal lobing. For a given leaf area, more highly lobed leaves have longer veins and higher vein to blade ratios, allowing them to maintain similar leaf areas despite increased lobing. These findings show how more highly lobed leaves may compensate for what would otherwise result in a reduced leaf area, allowing for increased photosynthetic capacity through similar leaf size.</p>
Text-fig. 13. a, d–g: Acer aemilianum. b, c: Acer palmatum and A. sieboldianum modern leaves (NMNS Cleared Leaf Database). a: Oriolo MSF 661, 7-lobed leaf. b: Specimen U 1049, lobe detail showing finely serrate leaf margin. c: Specimen T 0246, 9-lobed leaf with coarsely serrate leaf margin. d: Oriolo MSF 645-1, 9-lobed leaf with two small additional lobes. e: Oriolo MSF 645. f: Oriolo MSF 660, 9-lobed specimen. g: Oriolo MSF 660-1. White arrows indicate position along lamina lobes where marginal serration starts. Scale bars 10 mm (a–c, f, g), 50 mm (d, e). in The Late Early Pleistocene Flora Of Oriolo, Faenza (Italy): Assembly Of The Modern Forest Biome
Text-fig. 13. a, d–g: Acer aemilianum. b, c: Acer palmatum and A. sieboldianum modern leaves (NMNS Cleared Leaf Database). a: Oriolo MSF 661, 7-lobed leaf. b: Specimen U 1049, lobe detail showing finely serrate leaf margin. c: Specimen T 0246, 9-lobed leaf with coarsely serrate leaf margin. d: Oriolo MSF 645-1, 9-lobed leaf with two small additional lobes. e: Oriolo MSF 645. f: Oriolo MSF 660, 9-lobed specimen. g: Oriolo MSF 660-1. White arrows indicate position along lamina lobes where marginal serration starts. Scale bars 10 mm (a–c, f, g), 50 mm (d, e).
Text-fig. 2. Nymphaea sp. from the Miocene Clarkia Lake flora, Locality P-33. a: Photograph of the fossil leaf. b: Sketch of leaf showing the salient features of shape, basal lobes and margin, eccentric insertion point of the abaxial petiole, and primary actinodromous venation. Dashed lines represent torn edge of lamina; dotted line is outline of right basal lobe. Line drawing by P. Martin Sander. Scale bar applies to both photo and drawing. in First Water Lily, A Leaf Of Nymphaea Sp., From The Miocene Clarkia Flora, Northern Idaho, Usa: Occurrence, Taphonomic Observations, Floristic Implications
Text-fig. 2. Nymphaea sp. from the Miocene Clarkia Lake flora, Locality P-33. a: Photograph of the fossil leaf. b: Sketch of leaf showing the salient features of shape, basal lobes and margin, eccentric insertion point of the abaxial petiole, and primary actinodromous venation. Dashed lines represent torn edge of lamina; dotted line is outline of right basal lobe. Line drawing by P. Martin Sander. Scale bar applies to both photo and drawing.
Text-fig. Fig. 9. Cucurbitaceae 1–4. Cucurbitaciphyllum lobatum (KNOWLTON) comb. nov. Specimens from Shirley Canal, Montana, USGS loc. 8519. 1. Trilobate leaf, with rounded lobal sinues, and entire to serrated margin. USNM 313167. 2. Leaf with pronounced secondary lobes and cordate base, USNM 313179. 3. Detail of central lobe from fig. 1. 4. Higher magnification, showing abundant trichome impressions. Scales = 3 cm in 1–3; 3 mm in 4. in Revisions To Roland Brown'S North American Paleocene Flora
Text-fig. Fig. 9. Cucurbitaceae 1–4. Cucurbitaciphyllum lobatum (KNOWLTON) comb. nov. Specimens from Shirley Canal, Montana, USGS loc. 8519. 1. Trilobate leaf, with rounded lobal sinues, and entire to serrated margin. USNM 313167. 2. Leaf with pronounced secondary lobes and cordate base, USNM 313179. 3. Detail of central lobe from fig. 1. 4. Higher magnification, showing abundant trichome impressions. Scales = 3 cm in 1–3; 3 mm in 4.
Text-fig. 4. Platanaceae 1–3. Macginitiea gracilis (LESQUEREUX) J. WOLFE et WEHR leaves and associated reproductive structures 1. Holotype of Aralia gracilis LESQUEREUX from Bridger Pass, Wyoming, USNM 330. 2. Specimen showing the typical configuration of five lobes, Killpecker Creek flora, Wyoming. UF 18126-13242. 3. Silicified M. gracilis leaf from Almont, North Dakota; arrow indicates adjacent Macginicarpa infructescence, UF 15722-29202a. 4. Macginicarpa infructescence from Almont, UF15722-35493. 5. Platananthus sp., Almont, UF 15722-62019. 6. Macginicarpa glabra MANCHESTER infructescence, enlarged from fig. 3, UF 15722-29202b. Specimens in figs 3-6 collected and donated by John Curtis. Scales = 1 cm. Images 3–6 light-dark inverted. in Revisions To Roland Brown'S North American Paleocene Flora
Text-fig. 4. Platanaceae 1–3. Macginitiea gracilis (LESQUEREUX) J. WOLFE et WEHR leaves and associated reproductive structures 1. Holotype of Aralia gracilis LESQUEREUX from Bridger Pass, Wyoming, USNM 330. 2. Specimen showing the typical configuration of five lobes, Killpecker Creek flora, Wyoming. UF 18126-13242. 3. Silicified M. gracilis leaf from Almont, North Dakota; arrow indicates adjacent Macginicarpa infructescence, UF 15722-29202a. 4. Macginicarpa infructescence from Almont, UF15722-35493. 5. Platananthus sp., Almont, UF 15722-62019. 6. Macginicarpa glabra MANCHESTER infructescence, enlarged from fig. 3, UF 15722-29202b. Specimens in figs 3-6 collected and donated by John Curtis. Scales = 1 cm. Images 3–6 light-dark inverted.
Increases in vein length compensate for leaf area lost to lobing in grapevine
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FIGURE 2. Justicia cordifolia. A. Inflorescence. B. Bracts and calyx lobes. C. Leaf blade. D in Justicia cordifolia, a new combination in Brazilian Acanthaceae
FIGURE 2. Justicia cordifolia. A. Inflorescence. B. Bracts and calyx lobes. C. Leaf blade. D. Stems.
FIGURE 12. Saussurea multiloba. A. Habit. B. Floret. C. Leaf lobe. D. Style branches. E. Inner pappus bristle. F. Outer pappus bristle. G in Twenty-six new species of Saussurea (Asteraceae, Cardueae) from the Qinghai-Tibetan Plateau and adjacent regions
FIGURE 12. Saussurea multiloba. A. Habit. B. Floret. C. Leaf lobe. D. Style branches. E. Inner pappus bristle. F. Outer pappus bristle. G. Phyllaries (from left to right, outer to inner series). H. Anthers. I. Floret (with pappus removed). All from Y. S. Chen 9532 (PE). Drawn by Mr. Y.X. Zhu.
FIGURES 19‒34. Cheilolejeunea cuspidifera. 19. Gametophyte, ventral view. 20‒24. Leaf lobe apices. 25‒27. Underleaves. 28‒29. Lobules. 30. Lobule apex showing second and first teeth. 31 in Three new species of Cheilolejeunea (Spruce) Steph. (Marchantiophyta, Lejeuneaceae) from northern Brazil
FIGURES 19‒34. Cheilolejeunea cuspidifera. 19. Gametophyte, ventral view. 20‒24. Leaf lobe apices. 25‒27. Underleaves. 28‒29. Lobules. 30. Lobule apex showing second and first teeth. 31. Marginal cells of the leaf lobules. 32. Laminal cells. 33. Stem in cross section. 34. Gynoecial branch with innovation (from holotype, Mário H.T. Araújo 1245).
FIGURES 11‒18. Cheilolejeunea caracariensis. 11. Gametophyte, ventral view. 12. Leaf lobe apex. 13. Underleaf and lobule. 14 in Three new species of Cheilolejeunea (Spruce) Steph. (Marchantiophyta, Lejeuneaceae) from northern Brazil
FIGURES 11‒18. Cheilolejeunea caracariensis. 11. Gametophyte, ventral view. 12. Leaf lobe apex. 13. Underleaf and lobule. 14: Free margin of leaf lobule. 15. Leaf lobule apex. 16. Laminal cells. 17‒18. Stems in cross sections (from holotype, Mário H.T. Araújo 1217a).
FIGURE 62. Lavoisiera subulata. A. Habit. B. Adaxial leaf surface. C. Flower. D. Hypanthium and calyx lobes. E. Ovary crosssection. F in A Monograph of the Brazilian endemic genus Lavoisiera (Melastomataceae: Microlicieae)
FIGURE 62. Lavoisiera subulata. A. Habit. B. Adaxial leaf surface. C. Flower. D. Hypanthium and calyx lobes. E. Ovary crosssection. F. Petal with enlarged detail of basal margin (lower left). G. Ventral view of antesepalous stamen. H. Ventral view of antepetalous stamen. I. Seed. (Based on: A, Almeda et al. 8620, CAS, UEC; B–I, Almeda et al. 8571, CAS, UEC.)
FIGURE 61. Lavoisiera setosa. A. Habit. B. Abaxial leaf surface. C. Adaxial leaf surface. D. Flower. E. Hypanthium and calyx lobes. F in A Monograph of the Brazilian endemic genus Lavoisiera (Melastomataceae: Microlicieae)
FIGURE 61. Lavoisiera setosa. A. Habit. B. Abaxial leaf surface. C. Adaxial leaf surface. D. Flower. E. Hypanthium and calyx lobes. F. Abaxial calyx lobe surface with enlargement of margin detail (right). G. Petal with enlarged detail of apex (above) and lateral margin (left). H. Ventral view of antesepalous stamen. I. Ventral view of antepetalous stamen. (Based on: A–I, Oliveira et al. 1000, CAS, UEC.)
FIGURE 53. Lavoisiera pulcherrima. A. Habit. B. Adaxial leaf surface. C. Flower. D. Hypanthium and calyx lobes. E. Ovary crosssection. F in A Monograph of the Brazilian endemic genus Lavoisiera (Melastomataceae: Microlicieae)
FIGURE 53. Lavoisiera pulcherrima. A. Habit. B. Adaxial leaf surface. C. Flower. D. Hypanthium and calyx lobes. E. Ovary crosssection. F. Ventral view of antesepalous stamen. G. Ventral view of antepetalous stamen. H. Old disintegrating hypanthia and capsule with persisting vascular strands. I. Seed. J. Petal with enlarged detail of apical margin (upper left) and lateral margin detail (lower right). (Based on: A, Romero & Nakajima 5948, UEC; B–J, Pirani et al. CFSC 10270, UEC.)
FIGURE 47. Lavoisiera mellobarretoi. A. Habit. B. Abaxial leaf surface. C. Abaxial flower bract surface. D. Abaxial bud bract surface. E. Flower. F. Hypanthium and calyx lobes. G. Ovary cross-section. H in A Monograph of the Brazilian endemic genus Lavoisiera (Melastomataceae: Microlicieae)
FIGURE 47. Lavoisiera mellobarretoi. A. Habit. B. Abaxial leaf surface. C. Abaxial flower bract surface. D. Abaxial bud bract surface. E. Flower. F. Hypanthium and calyx lobes. G. Ovary cross-section. H. Ventral view of antesepalous stamen. I. Ventral view of antepetalous stamen. J. Seed. K. Petal, with enlargement of margin detail (right). (Based on: B–H, I, Pirani & Mello-Silva CFCR 10764, SPF; A, J, Cordeiro et al. CFCR 961, SPF.)
FIGURE 52. Lavoisiera pulchella. A. Habit. B. Abaxial leaf surface. C. Abaxial bract surface. D. Flower. E. Hypanthium and calyx lobes. F. Ovary cross-section. G in A Monograph of the Brazilian endemic genus Lavoisiera (Melastomataceae: Microlicieae)
FIGURE 52. Lavoisiera pulchella. A. Habit. B. Abaxial leaf surface. C. Abaxial bract surface. D. Flower. E. Hypanthium and calyx lobes. F. Ovary cross-section. G. Petal with apex detail (above) and margin detail (lower left). H. Ventral view of antesepalous stamen. I. Ventral view of antepetalous stamen. J. Seed. (Based on: A–J, Shepherd & Andrade 6158, UEC.)
FIGURE 29. Lavoisiera chamaepitys. A. Habit. B. Detached branchlet. C. Adaxial leaf surface. D. Abaxial bract surface. E. Flower. F. Hypanthium and calyx lobes. G. Ovary cross-section. H in A Monograph of the Brazilian endemic genus Lavoisiera (Melastomataceae: Microlicieae)
FIGURE 29. Lavoisiera chamaepitys. A. Habit. B. Detached branchlet. C. Adaxial leaf surface. D. Abaxial bract surface. E. Flower. F. Hypanthium and calyx lobes. G. Ovary cross-section. H. Petal with enlarged detail of margin (lower right). I. Ventral view of antesepalous stamen. J. Ventral view of antepetalous stamen. K. Post-mature fruit. L. Persisting columella and placenta. M. Seed. (Based on: A–M, Almeda et al. 8500, CAS, UEC.)
FIGURE 34. Lavoisiera crassifolia. A. Habit. B. Adaxial leaf surface. C. Flower. D. Hypanthium and calyx lobes. E. Ovary crosssection. F in A Monograph of the Brazilian endemic genus Lavoisiera (Melastomataceae: Microlicieae)
FIGURE 34. Lavoisiera crassifolia. A. Habit. B. Adaxial leaf surface. C. Flower. D. Hypanthium and calyx lobes. E. Ovary crosssection. F. Petal with enlarged detail of margin (lower left). G. Ventral view of antesepalous stamen. H. Ventral view of antepetalous stamen. I. Seed. (Based on: A, Almeda et al. 8442, CAS, UEC; B–I, Almeda et al. 8477, CAS, UEC.)
FIGURE 19. Lavoisiera angustifolia. A. Habit. B. Branch with terminal flower. C. Abaxial leaf surface. D. Adaxial leaf surface. E. Abaxial bract surface. F. Hypanthium and calyx lobes. G. Ovary cross section. H in A Monograph of the Brazilian endemic genus Lavoisiera (Melastomataceae: Microlicieae)
FIGURE 19. Lavoisiera angustifolia. A. Habit. B. Branch with terminal flower. C. Abaxial leaf surface. D. Adaxial leaf surface. E. Abaxial bract surface. F. Hypanthium and calyx lobes. G. Ovary cross section. H. Petal with margin detail (right). I. Ventral view of antesepalous stamen. J. Ventral view of antepetalous stamen. K. Seed. (Based on: A–K, Libon s.n., C.)
FIGURE 17. Lavoisiera alba. A. Habit. B. Adaxial leaf surface. C. Bud and subtending bracts. D. Flower. E. Hypanthium and calyx lobes. F. Ovary cross-section. G in A Monograph of the Brazilian endemic genus Lavoisiera (Melastomataceae: Microlicieae)
FIGURE 17. Lavoisiera alba. A. Habit. B. Adaxial leaf surface. C. Bud and subtending bracts. D. Flower. E. Hypanthium and calyx lobes. F. Ovary cross-section. G. Petal with enlarged margin detail (lower right). H. Ventral view of antesepalous stamen. I. Ventral view of antepetalous stamen. J. Seed. (Based on: A–J, Almeda et al. 8388, CAS, UEC.)
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