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37 results for “leaf venation”
Text-fig. 2. Ferns, Ginkgo, and taxodioid conifers. a: Filicalean fern type 1. UAPC-ALTA S sn. b, c: Filicalean fern type 2. b: Overview of specimen, UAPC-ALTA S 59515. c: Detail of (b) to show pinnule shape. d: Azolla primaeva, small plant fragments and rhizoids, BBM-PAL-P000002. e: Metasequoia occidentalis twig with leafy branchlets, BBM- PAL-P000003. f: Ginkgo biloba leaf showing dichotomous venation, GSC 7567. g: Taxodioid branches with flared shoot apices that may represent small cones, UAPC-ALTA S 25090. h: Metasequoia occidentalis branchlet showing opposite leaves, UAPC-ALTA S 59495. i: Taxodioid branchlet showing variation, BBM-PAL-P000004. j: Taxodioid pollen cone, BBM-PAL-P000045. k: Metasequoia seed cone, BBM-PAL-P000005 A. l: cf. Chamaecyparis, BBM-PAL-P000006. Scale bars: a–c, f–l = 1 cm, d = 0.5 cm, e = 2 cm. in The Early Eocene Flora Of Horsefly, British Columbia, Canada And Its Phytogeographic Significance
Text-fig. 2. Ferns, Ginkgo, and taxodioid conifers. a: Filicalean fern type 1. UAPC-ALTA S sn. b, c: Filicalean fern type 2. b: Overview of specimen, UAPC-ALTA S 59515. c: Detail of (b) to show pinnule shape. d: Azolla primaeva, small plant fragments and rhizoids, BBM-PAL-P000002. e: Metasequoia occidentalis twig with leafy branchlets, BBM- PAL-P000003. f: Ginkgo biloba leaf showing dichotomous venation, GSC 7567. g: Taxodioid branches with flared shoot apices that may represent small cones, UAPC-ALTA S 25090. h: Metasequoia occidentalis branchlet showing opposite leaves, UAPC-ALTA S 59495. i: Taxodioid branchlet showing variation, BBM-PAL-P000004. j: Taxodioid pollen cone, BBM-PAL-P000045. k: Metasequoia seed cone, BBM-PAL-P000005 A. l: cf. Chamaecyparis, BBM-PAL-P000006. Scale bars: a–c, f–l = 1 cm, d = 0.5 cm, e = 2 cm.
Text-fig. 9. Miscellaneous leaves. a: Leaf of Anacardiaceae, UAPC-ALTA S 59513. b: Sapindaceous leaf, BBM-PAL-P000046. c: Twig with compound leaves of Averrhoites affinis, UAPC-ALTA S 67694. d, e: cf. Morus. Finely serrate leaf with actinodromous venation, prominent agrophic veins and strongly percurrent tertiary veins, UAPC-ALTA S 67695. f: Leaf with strongly apically arched upper pairs of secondary veins and entire margins, UAPC-ALTA S 59504. g: Compound leaf, UAPC-ALTA S 59504A. h: Detail of (g) showing one leaflet. i: Incomplete basal part of a lamina with rounded base and entire margin, UAPC-ALTA S 6565. j: Compound leaf with leaflets sessile on a stout rachis, UAPC-ALTA sn. Scale bars: a, c, d, i = 2 cm, b, e–h, j = 1 cm. in The Early Eocene Flora Of Horsefly, British Columbia, Canada And Its Phytogeographic Significance
Text-fig. 9. Miscellaneous leaves. a: Leaf of Anacardiaceae, UAPC-ALTA S 59513. b: Sapindaceous leaf, BBM-PAL-P000046. c: Twig with compound leaves of Averrhoites affinis, UAPC-ALTA S 67694. d, e: cf. Morus. Finely serrate leaf with actinodromous venation, prominent agrophic veins and strongly percurrent tertiary veins, UAPC-ALTA S 67695. f: Leaf with strongly apically arched upper pairs of secondary veins and entire margins, UAPC-ALTA S 59504. g: Compound leaf, UAPC-ALTA S 59504A. h: Detail of (g) showing one leaflet. i: Incomplete basal part of a lamina with rounded base and entire margin, UAPC-ALTA S 6565. j: Compound leaf with leaflets sessile on a stout rachis, UAPC-ALTA sn. Scale bars: a, c, d, i = 2 cm, b, e–h, j = 1 cm.
Text-fig. 4. Monocots. a, b: Large monocot leaf part and counterpart, UAPC-ALTA S 17955A, B. a: Wide leaf showing entire margin at left. b: Counterpart showing dark wide midrib, and and secondaries parallel to one another, arising at low acute angle. c–e: Monocot leaf with parallel venation. c: Overview of elongate monocot leaf with parallel veins horizontal and linear to oval structures and smaller leaf fragment of same type lacking them (at lower right), UAPC-ALTA S 59491. d: Higher magnification of the smaller fragment with weak cross veins. e: Higher magnification of larger specimen with linear to oval structures between parallel veins. f, g: Monocot leaf with parallel venation. Fig. (f) shows higher magnification and (g) shows overview, BBM-PAL-P000009. Scale bars: a, b = 5 cm, c = 4 cm, d–f = 1 cm, g = 2 cm. in The Early Eocene Flora Of Horsefly, British Columbia, Canada And Its Phytogeographic Significance
Text-fig. 4. Monocots. a, b: Large monocot leaf part and counterpart, UAPC-ALTA S 17955A, B. a: Wide leaf showing entire margin at left. b: Counterpart showing dark wide midrib, and and secondaries parallel to one another, arising at low acute angle. c–e: Monocot leaf with parallel venation. c: Overview of elongate monocot leaf with parallel veins horizontal and linear to oval structures and smaller leaf fragment of same type lacking them (at lower right), UAPC-ALTA S 59491. d: Higher magnification of the smaller fragment with weak cross veins. e: Higher magnification of larger specimen with linear to oval structures between parallel veins. f, g: Monocot leaf with parallel venation. Fig. (f) shows higher magnification and (g) shows overview, BBM-PAL-P000009. Scale bars: a, b = 5 cm, c = 4 cm, d–f = 1 cm, g = 2 cm.
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. 7. Cercidiphyllaceae 1–3. Trochodendroides genetrix (NEWBERRY) comb. nov. and associated reproductive structures (4, 5) from Killpecker Cr., Rock Springs, Wyoming (UF loc. 18126). 1. Twig with three attached leaves, showing variation in leaf shape and serration; composite figure assembled from images of both counterparts, UF 35427. 2. Complete leaf including petiole, UF 13243. 3. Same as 2, detail of venation. 4. Nyssidium arcticum (HEER) ILJINSKAYA fruits on an incomplete axis, UF 35454. 5. Dispersed winged seed, UF 35479. Scale = 3 cm in 1, 2; 1 cm in 3, 4; 0.5 cm in 5. in Revisions To Roland Brown'S North American Paleocene Flora
Text-fig. 7. Cercidiphyllaceae 1–3. Trochodendroides genetrix (NEWBERRY) comb. nov. and associated reproductive structures (4, 5) from Killpecker Cr., Rock Springs, Wyoming (UF loc. 18126). 1. Twig with three attached leaves, showing variation in leaf shape and serration; composite figure assembled from images of both counterparts, UF 35427. 2. Complete leaf including petiole, UF 13243. 3. Same as 2, detail of venation. 4. Nyssidium arcticum (HEER) ILJINSKAYA fruits on an incomplete axis, UF 35454. 5. Dispersed winged seed, UF 35479. Scale = 3 cm in 1, 2; 1 cm in 3, 4; 0.5 cm in 5.
Text-fig. 1. Zamites pateri J.KVAČEK sp. nov.; Pecínov locality, holotype, No. NM-F 5185. a: Holotype overview showing fragment of simply pinnate leaf, scale bar 20 mm. b: Abaxial cuticle showing costal and intercostal scale zones and stomata in ill-defined rows, LM micro-photograph, scale bar 100 µm. c: Pinnule detail showing venation pattern, scale bar 5 mm. d: Abaxial cuticle showing costal and intercostal zones, LM micro-photograph, scale bar 500 µm. e: Fragmentary preserved adaxial cuticle showing in New Species Of Zamites From The Cenomanian Of The Bohemian Cretaceous Basin
Text-fig. 1. Zamites pateri J.KVAČEK sp. nov.; Pecínov locality, holotype, No. NM-F 5185. a: Holotype overview showing fragment of simply pinnate leaf, scale bar 20 mm. b: Abaxial cuticle showing costal and intercostal scale zones and stomata in ill-defined rows, LM micro-photograph, scale bar 100 µm. c: Pinnule detail showing venation pattern, scale bar 5 mm. d: Abaxial cuticle showing costal and intercostal zones, LM micro-photograph, scale bar 500 µm. e: Fragmentary preserved adaxial cuticle showing
Data from: Structural and defensive roles of angiosperm leaf venation network reticulation across an Andes-Amazon elevation gradient
1.The network of minor veins of angiosperm leaves may include loops (reticulation). Variation in network architecture has been hypothesized to have hydraulic and also structural and defensive functions. 2.We measured venation network trait space in eight dimensions for 136 biomass-dominant angiosperm tree species along a 3,300 m elevation gradient in southeastern Peru. We then examined the relative importance of multiple ecological, and evolutionary predictors of reticulation. 3.Variation in minor venation network reticulation was constrained to three axes. These axes described branching vs. reconnecting veins, elongated vs. compact areoles, and high vs. low density veins. Variation in the first two axes was predicted by traits related to mechanical strength and secondary compounds, and in the third axis by site temperature. 4.Synthesis. Defensive and structural factors primarily explain variation in multiple axes of reticulation, with a smaller role for climate-linked hydraulic factors. These results suggest that venation network reticulation may be determined more by species interactions than by hydraulic functions.
Data from: Structural and defensive roles of angiosperm leaf venation network reticulation across an Andes-Amazon elevation gradient
Open the record for dataset details and reuse information.
Data from: Tovomita (Clusiaceae) from the Brazilian Atlantic Forest: taxonomy and utility of leaf venation characters at the species level
Tovomita comprises approximately 50 species that are mainly distributed in moist forests of the Neotropics. In Brazil there are 34 species, which occur in the Amazon region and along the Atlantic coast. We here describe and illustrate the Tovomita species from the Brazilian Atlantic Forest, as well as characterize the leaf morphology of these taxa. Leaves were cleared and their venation was analyzed to look for diagnostic characters related to architecture and the relationship between the secondary and intersecondary veins. Eleven species of Tovomita were recorded, which have distributions ranging from the state of Rio Grande do Norte to the state of Rio de Janeiro. An identification key, based on the analysis, and distribution maps are provided. Tovomita salimenae, a new and vulnerable species endemic to the state of Minas Gerais, is described and two synonyms and nine lectotypifications are proposed. This work also revealed that seven species have larger distributions than previously thought and two species are critically endangered (T. iaspidis and T. megantha). The most relevant characters used to identify the studied species were exudate color, venation pattern, and bud shape.
Data from: A modern ampelography: a genetic basis for leaf shape and venation patterning in Vitis vinifera
Terroir, the unique interaction between genotype, environment, and culture, is highly refined in domesticated grape, Vitis vinifera. Towards cultivating terroir, the science of ampelography tried to distinguish thousands of grape cultivars, without the aid of genetics. This led to sophisticated phenotypic analyses of natural variation in grape leaves, which within a palmate-lobed framework exhibit diverse patterns of blade outgrowth, hirsuteness, and venation patterning. Here, we provide a morphometric analysis of >1,200 V. vinifera accessions. Elliptical Fourier Descriptors provide a global analysis of leaf outlines and lobe positioning, while a Procrustes analysis quantitatively describes venation patterning. Correlation with previous ampelography suggests an important genetic component, which we confirm with estimates of heritability. We further use RNA-Seq of mutant varieties and perform a Genome-Wide Association Study (GWAS) to explore the genetic basis of leaf shape. Meta-analysis reveals a relationship between leaf morphology and hirsuteness, traits known to correlate with climate in the fossil record and extant species. Together, our data demonstrate a genetic basis for the intricate diversity present in grape leaves. We discuss the possibility of using grape leaves as a breeding target to preserve terroir in the face of anticipated climate change, a major problem facing viticulture.
FIGURE. Euphorbia multibrachiata in cultivation. A. detail of the spination; B. detail of the leaf venation and reddish petiole; C. inflorescence showing the spreading cyathophylls; D. fruits; E. young seedling in cultivation showing the early branching. Credits: J.Spannring (A–E). in Taxonomic changes and new species in Malagasy Euphorbia (Euphorbiaceae)
FIGURE. Euphorbia multibrachiata in cultivation. A. detail of the spination; B. detail of the leaf venation and reddish petiole; C. inflorescence showing the spreading cyathophylls; D. fruits; E. young seedling in cultivation showing the early branching. Credits: J.Spannring (A–E).
FIGURE 8 in Leaf venation of living species of Persea (Lauraceae), with taxonomic and nomenclatural notes
FIGURE 8. Photomicrographs of Persea leaves. A. P. alba Nees & Mart. (Schwacke 5779). B. P. albida Kosterm. (House 1057). C. P. americana Mill. (Mori 10269). D. P. areolatocostae (C.K.Allen) van der Werff (Monteagudo 4714). E. P. aurata Miq. (Blanchet 3566). F. P. aurata Miq. (Gardner 4358). G. P. aurata Miq. (Pohl 2884). H. P. benthamiana Meisn. (Spruce 2766). I. P. borbonia (L.) Spreng. (Jones 23939). J. P. buchtienii O.C.Schmidt (Nee 42046). K. P. caerulea (Ruiz & Pav.) Mez (Ferrer-Pereira 699). L. P. caerulea (Ruiz & Pav.) Mez (Nee 42084). M. P. caerulea (Ruiz & Pav.) Mez (van der Werff 9473). N. P. caesia Meisn. (Moraes 4215). O. P. chamissonis Mez (García-Mendoza 1850). P. P. chrysophylla L.E.Kopp (Soejarto 3057). Q. P. croizatii van der Werff (Almeida 624). R. P. cuneata Meisn. (Escobar 7182). S. P. donnell-smithii Mez (Tenorio L. 14894). T. P. fastigiata L.E.Kopp (Maguire 36958). U. P. ferruginea Kunth (McPherson 13173). V. P. fuliginosa Nees & Mart. (Sellow 4313). W. P. fulva L.E.Kopp (Claussen 132). X. P. fulva L.E.Kopp (Glaziou 14203). Y. P. fulva L.E.Kopp (Harley 27826). Z. P. fulva L.E.Kopp (Warming s.n.). A'. P. fusca Mez (Glaziou 22068). B'. P. fusca Mez (Glaziou 22069). Bars = 250 μm.
FIGURE 7. X in Leaf venation of living species of Persea (Lauraceae), with taxonomic and nomenclatural notes
FIGURE 7. X-ray images (close-up) of the leaf venation of Persea. A. P. pumila P.L.R.Moraes & R.S.Pacheco (Moraes 3572). B. P. punctata Meisn. (Lund s.n.). C. P. rigida Nees & Mart. (Sellow 652). D. P. rufotomentosa Nees & Mart. (Moraes 3592). E. P. ruizii J.F.Macbr. (Solomon 15364). F. P. schiedeana Nees (Hammel 6966). G. P. sericea Kunth (Harling 23755). H. P. venosa Nees & Mart. (Herbarium Lusitanicum). I. P. venosa Nees & Mart. (Falkenberg 2971). J. P. veraguasensis Seem. (Davidse 24628). K. P. vesticula Standl. & Steyerm. (Hawkins 450). L. P. willdenovii Kosterm. (Sellow 5230 = H.I.B. 134). Bars = 5 mm.
FIGURE 12 in Leaf venation of living species of Persea (Lauraceae), with taxonomic and nomenclatural notes
FIGURE 12. Leaf venation of Caryodaphnopsis inaequalis (A.C.Sm.) van der Werff & H.G.Richt. A, D, G. Krukoff 4770. Machilus japonica Siebold & Zucc. ex Blume. B, E, H. Takagi 6. Machilus thunbergii Siebold & Zucc. C, F, I. Takagi 17. Bars: 1 cm (A–C), 5 mm (D–F), 250 μm (G–I).
FIGURE 9 in Leaf venation of living species of Persea (Lauraceae), with taxonomic and nomenclatural notes
FIGURE 9. Photomicrographs of Persea leaves. A. P. glabra van der Werff (Fróes 20022). B. P. glabra van der Werff (Harley 27205). C. P. glabra van der Werff (Moraes 2585). D. P. haenkeana Mez (Solomon 9293). E. P. humilis Nash (Kral 48093). F. P. hypoleuca (A.Rich.) Mez (Linden 1773). G. P. jariensis Vattimo-Gil (Silva 5395). H. P. jenmanii Mez (Steyermark 120). I. P. julianae van der Werff (Holmgren 54397). J. P. liebmannii Mez (Tenorio L. 6241). K. P. lingue Nees (Gay s.n.). L. P. longipes (Schltdl.) Meisn. (Schiede 59). M. P. meridensis L.E.Kopp (Marcano Berti 1730). N. P. meziana Rasingam & Karthig. (Santos Lima 342). O. P. meziana Rasingam & Karthig. (Moraes 5185). P. P. meziana Rasingam & Karthig. (Pereira 9869). Q. P. oblongifolia L.E.Kopp (Liogier 11380). R. P. obovata Nees & Mart. (Garcia 902). S. P. palustris (Raf.) Sarg. (Hansen 9993). T. P. pedunculosa Meisn. (Claussen 1774). U. P. perseiphylla (C.K.Allen) van der Werff (Boom 5743). V. P. peruviana Nees (Bernardi 16235). W. P. peruviana Nees (Spichiger 4749). X. P. povedae W.C.Burger (Herrera Ch. 435). Y. P. psammophila P.L.R.Moraes (Moraes 5358). Z. P. pseudofasciculata L.E.Kopp (Krukoff 11283). A'. P. pseudofasciculata L.E.Kopp (Krukoff 7080). B'. P. pumila P.L.R.Moraes & R.S.Pacheco (Moraes 3572). Bars = 250 μm.
FIGURE 2. X in Leaf venation of living species of Persea (Lauraceae), with taxonomic and nomenclatural notes
FIGURE 2. X-ray images of Persea leaves. A. P. glabra van der Werff (Harley 27205). B. P. haenkeana Mez (Solomon 9293). C. P. humilis Nash (Kral 48093). D. P. jenmanii Mez (Steyermark 92485). E. P. julianae van der Werff (Holmgren 54397). F. P. liebmannii Mez (Tenorio L. 6241). G. P. lingue Nees (Mahu s.n.). H. P. longipes (Schltdl.) Meisn. (Schiede 59). I. P. meridensis L.E.Kopp (Berti 1730). J. P. meziana Rasingam & Karthig. (Moraes 5178). K. P. obovata Nees & Mart. (Godoy 775). L. P. palustris (Raf.) Sarg. (Hansen 9993). M. P. pedunculosa Meisn. (Claussen 1774). N. P. perseiphylla (C.K.Allen) van der Werff (Boom 5743). O. P. peruviana Nees (Bernardi 16235). P. P. povedae W.C.Burger (Herrera Ch. 435). Q. P. pseudofasciculata L.E.Kopp (Krukoff 11283). R. P. pumila P.L.R.Moraes & R.S.Pacheco (Moraes 3572). S. P. punctata Meisn. (Lund s.n.). T. P. rigida Nees & Mart. (Sellow 652). Bars = 1 cm.
FIGURE 5. X in Leaf venation of living species of Persea (Lauraceae), with taxonomic and nomenclatural notes
FIGURE 5. X-ray images (close-up) of the leaf venation of Persea. A. P. cuneata Meisn. (Escobar 7182). B. P. donnell-smithii Mez (Tenorio L. 14894). C. P. fastigiata L.E.Kopp (Cardoso 3363). D. P. ferruginea Kunth (McPherson 13173). E. P. fuliginosa Nees & Mart. (Sellow 4313). F. P. fulva L.E.Kopp (Glaziou 14203). G. P. fusca Mez (Glaziou 22069). H. P. glabra van der Werff (Moraes 2585). I. P. haenkeana Mez (Solomon 9293). J. P. humilis Nash (Kral 48093). K. P. jenmanii Mez (Steyermark 93567). L. P. julianae van der Werff (Holmgren 54397). Bars = 5 mm.
FIGURE 6. X in Leaf venation of living species of Persea (Lauraceae), with taxonomic and nomenclatural notes
FIGURE 6. X-ray images (close-up) of the leaf venation of Persea. A. P. liebmannii Mez (Tenorio L. 6241). B. P. lingue Nees (Mahu s.n.). C. P. longipes (Schltdl.) Meisn. (Schiede 59). D. P. meridensis L.E.Kopp (Berti 1730). E. P. meziana Rasingam & Karthig. (Moraes 5178). F. P. obovata Nees & Mart. (Garcia 902). G. P. palustris (Raf.) Sarg. (Hansen 9993). H. P. pedunculosa Meisn. (Claussen 1774). I. P. perseiphylla (C.K.Allen) van der Werff (Boom 5743). J. P. peruviana Nees (Bernardi 16235). K. P. povedae W.C.Burger (Herrera Ch. 435). L. P. pseudofasciculata L.E.Kopp (van der Werff 10006). Bars = 5 mm.
FIGURE 4. X in Leaf venation of living species of Persea (Lauraceae), with taxonomic and nomenclatural notes
FIGURE 4. X-ray images (close-up) of the leaf venation of Persea. A. P. alba Nees & Mart. (Schwacke 5779). B. P. albida Kosterm. (House 1057). C. P. americana Mill. (Rohan 44). D. P. areolatocostae (C.K.Allen) van der Werff (Monteagudo 4714). E. P. aurata Miq. (Blanchet 3566). F. P. benthamiana Meisn. (Spruce 2766). G. P. borbonia (L.) Spreng. (Jones 23939). H. P. buchtienii O.C.Schmidt (Nee 42046). I. P. caerulea (Ruiz & Pav.) Mez (van der Werff 9473). J. P. caesia Meisn. (Moraes 4715). K. P. chrysophylla L.E.Kopp (Soejarto 3057). L. P. croizatii van der Werff (Almeida 624). Bars = 5 mm.
FIGURE 1. X in Leaf venation of living species of Persea (Lauraceae), with taxonomic and nomenclatural notes
FIGURE 1. X-ray images of Persea leaves. A. P. alba Nees & Mart. (Schwacke 5779). B. P. albida Kosterm. (House 1057). C. P. americana Mill. (Rohan 44). D. P. areolatocostae (C.K.Allen) van der Werff (Monteagudo 4714). E. P. aurata Miq. (Vergne 63). F. P. benthamiana Meisn. (Spruce 2766). G. P. borbonia (L.) Spreng. (Jones 23939). H. P. buchtienii O.C.Schmidt (Nee 42046). I. P. caerulea (Ruiz & Pav.) Mez (van der Werff 9473). J. P. caesia Meisn. (Moraes 4715). K. P. chrysophylla L.E.Kopp (Soejarto 3057). L. P. croizatii van der Werff (Almeida 624). M. P. cuneata Meisn. (Escobar 7182). N. P. donnell-smithii Mez (Tenorio L. 14894). O. P. fastigiata L.E.Kopp (Cardoso 3363). P. P. ferruginea Kunth (McPherson 13173). Q. P. fuliginosa Nees & Mart. (Sellow 4313). R. P. fulva L.E.Kopp (Glaziou 14203). S. P. fusca Mez (Glaziou 22069). Bars = 1 cm.
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