Bibliographies thématiques / Dicotyledonous flora

Littérature scientifique sur le sujet « Dicotyledonous flora »

Auteur : Grafiati
Publié le 18 mai 2024

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Articles de revues sur le sujet "Dicotyledonous flora"

1

Wheeler, Elisabeth A., et Pieter Baas. « A Survey of the Fossil Record for Dicotiledonous Wood and its Significance for Evolutionary and Ecological Wood Anatomy ». IAWA Journal 12, no 3 (1991) : 275–318. http://dx.doi.org/10.1163/22941932-90001256.

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Data on fossil dicotyledonous wood were assembled in order to 1) test the Baileyan model for trends of specialisation in dicotyledonous wood anatomy by addressing the question - were 'primitive' wood anatomieal features (as defined by the Baileyan model) more common in the geologie past than at present?, 2) infer, on a broad geographie scale, past climatie regimes, and long term climatic change, and 3) assess the extent of knowledge of fossil dicotyledonous woods. The resulting database has information on 91 anatomieal features for over 1200 fossil dicotyledonous woods. The incidence of selected anatomical features was plotted through time (by geologie epoch) for the world and for two regional groupings (roughly corresponding to the Laurasian and Gondwanan supercontinents). For comparison to the fossil wood record, the incidence of wood anatomie al features in the Recent flora was obtained from the 5260 record OPCN database for extant dicotyledonous woods.
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Sadyrova, G. A., T. A. Bazarbaeva, D. K. Bayzhigitov et S. M. Jamilova. « Biodiversity of the meadow floristic complex of the ridge Ketpen-Temerlik ». BULLETIN of the L.N. Gumilyov Eurasian National University. BIOSCIENCE Series 136, no 3 (2021) : 13–25. http://dx.doi.org/10.32523/2616-7034-2021-136-3-13-25.

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This article presents results of long-term studies of the meadow flora of the Ketpen-Temerlik ridge within Kazakhstan and China. The article presents an analysis of the meadow floristic complex of the Ketpen-Temerlik ridge. The taxonomic diversity of species composition of meadow floristic complex, biomorphological analysis of life forms of meadow species, and also the belonging of meadow species to different geographical types of areas. A detailed floristic analysis of meadow flora made it possible to identify 624 species of vascular plants belonging to 230 genera and 47 families. According to the main taxonomic groups of plants, the meadow flora is represented by the Magnoliophyta department, which accounts for 82.2% of the total species composition, and only an insignificant percentage is in the Liliopsida department, 17.1%. The ratio of monocotyledonous and dicotyledonous plants in meadow flora is 1: 4.8. The total number of monocotyledons covers 107 species or 17.1% of the total number of species, there are 517 species of dicotyledonous plants or 82.2%. Analysis of the largest families of meadow flora made it possible to identify 16 largest families by the largest number of species, which contain 504 species. Analysis of the species richness of the genera of flora are: Potentilla, Carex, Ranunculus, Taraxacum, Astragalus, Silene, Veronica. The leading genus of meadow flora accounts for 25.1%. The article considers a boreal nature of the meadow flora. The article reveals a large presence among the meadow flora of Ketpen-Temerlik of mountainous middle asian species with an area limited to the territories of Mountainous Middle Asia.
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Wheeler, Elisabeth A., et Pieter Baas. « The potentials and limitations of dicotyledonous wood anatomy for climatic reconstructions ». Paleobiology 19, no 4 (1993) : 487–98. http://dx.doi.org/10.1017/s009483730001410x.

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The incidences of selected features of dicotyledonous wood that are believed to be of ecologic and/or phylogenetic significance (distinct growth rings, narrow and wide vessel diameter, high and low vessel frequencies, scalariform perforations, tangential vessel arrangement, ring porosity, and helical wall thickenings) were plotted through time (Cretaceous–Recent). There are marked differences between the Cretaceous and Tertiary in the frequency of all wood anatomical features. Incidences of features that are associated with markedly seasonal climates in extant floras do not approach modern levels until the Neogene. Correlations of wood anatomical features with ecology do not appear to have been constant through time, because in the Cretaceous different features provide conflicting information about the climate. Throughout the Tertiary the southern hemisphere/tropical and the northern hemisphere/temperate regions differed in the incidences of ecologically significant features and these differences are similar to those in the Recent flora. Possibilities for reliably using dicotyledonous wood for climatic reconstructions appear restricted to the Tertiary and Quaternary. However, at present the fossil wood record for most epochs and regions is too limited to permit detailed reconstructions of their past climate.
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Borkar, S. U., V. D. Nagrale, S. M. Meshram, A. N. Korpenwar et D. D. Ramteke. « Taxonomical identification of a new petrified multiseeded capsular fruit from the Deccan Intertrappean beds of Bhutera, India ». Journal of Palaeosciences 65, no (1-2) (31 décembre 2016) : 271–76. http://dx.doi.org/10.54991/jop.2016.314.

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The fossil flora of the Deccan Intertrappean beds of central India provides a unique opportunity for detailed investigation, taxonomic affinities and biogeographic relationships of plants during the late Cretaceous–early Palaeogene Period. The fossils found in cherts were deposited during quiescent intervals of lava flows. The present paper deals with a fossil fruit collected from the Deccan Intertrappean beds of Bhutera (lat. 22º06.58' N, long. 79º08.42' E) of Chhindwara District, Madhya Pradesh, India. The fruit was exposed in transverse oblique plane. The serial peel sections were taken for detailed study. The present fruit is small, dicotyledonous, obovate, unilocular, multiseeded, dehiscent capsular fruit. On comparison with modern dicotyledonous families, the fruit shows a close resemblance with Portulacaceae.
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Al-Eisawi, Dawud M. « Notes on the Flora of Jordan 13. New and Noteworthy Dicotyledonous Plants ». Kew Bulletin 41, no 4 (1986) : 949. http://dx.doi.org/10.2307/4102991.

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Dillhoff, Richard M., Estella B. Leopold et Steven R. Manchester. « The McAbee flora of British Columbia and its relation to the Early-Middle Eocene Okanagan Highlands flora of the Pacific Northwest ». Canadian Journal of Earth Sciences 42, no 2 (1 février 2005) : 151–66. http://dx.doi.org/10.1139/e04-084.

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Megafossils and pollen data are used to compare the flora found at the McAbee site, located near the town of Cache Creek, British Columbia, to six other well-collected Eocene lacustrine floras of Washington and western British Columbia. A diverse flora is found at McAbee consisting of at least 87 taxa. Gymnosperms are common, including sixteen separate species, 14 conifers and two ginkgos. A minimum of 67 angiosperm genera are represented in the flora, many yet to be described. The dominant dicotyledonous elements of the leaf assemblage at McAbee include Fagus (also represented by nuts and cupules) with Ulmus and representatives of the Betulaceae, especially Betula and Alnus. The confirmation of Fagus, also rarely found from sites at Princeton, British Columbia, and Republic, Washington, provides the oldest well-documented occurrence of the genus, predating the Early Oligocene records of Fagus previously reported for North America, Asia, and Europe. Data provided by pollen analysis broadens our knowledge of the McAbee flora. Angiosperm pollen typically predominates over gymnosperms with the Ulmoideae and Betulaceae being the most common angiosperm pollen types. Members of the Pinaceae dominate the gymnosperm pollen record. Paleoclimatic estimates for McAbee are slightly cooler than for the Republic and Princeton localities and thermophilic elements, such as Sabal found at Princeton or Ensete and Zamiaceae found at Republic are not known from McAbee.
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Panfilov, A. E., N. I. Kazakova, N. N. Zezin, E. L. Tikhanskaya et P. Yu Ovchinnikov. « Taxonomic composition of weed vegetation in the southern and middle Urals and zonal features of its control in maize crops ». E3S Web of Conferences 222 (2020) : 03024. http://dx.doi.org/10.1051/e3sconf/202022203024.

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As a result of expeditionary-route studies, the impoverishment of the composition of the segetal flora in maize crops was established when moving from the North-West to the South-East of the Ural region: from 37 species in the forest-meadow and mountain-forest zones to 10 in the steppe zone. Zonal features of the composition of weed communities associated with the hydrothermal gradient consist in the mutual substitution of annual monocotyledonous and dicotyledonous species with a stable contribution of perennial dicotyledons, as well as the replacement of mesophytic weeds with xerophytic species of the same families. A comparison of cross-spectrum herbicides effectiveness in the forest-steppe and forest-meadow zones showed the advantages of a post-emergent preparation with soil effect of Meister Power. In temperate soil fertility in the Southern area of the region, it is economically feasible to use post-emergent herbicides without soil effect, in Northern areas with stable moisture – soil ones.
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Balan, Anoop P., et S. Harikrishnan. « Floristic diversity of the Indian Cardamom Research Institute campus, Myladumpara, Western Ghats, India ». Journal of Threatened Taxa 9, no 10 (26 octobre 2017) : 10804. http://dx.doi.org/10.11609/jott.2611.9.10.10804-10822.

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A study on the flora of Indian Cardamom Research Institute campus, Myladumpara was carried out during 2012–2015 and a total of 515 taxa were collected during this study. The indigenous or naturalized flora is represented by 392 taxa in 303 genera under 94 families. Dicotyledonous plants dominate with 335 species in 251 genera under 80 families. Monocotyledons are represented by 57 species in 52 genera under 14 families. Among the families, Fabaceae dominates with 29 species followed by Asteraceae (27 spp.) and Euphorbiaceae (22 spp.) and 40 families are represented by single species each. During the study 68 species that are considered as endemic to the Western Ghats could be collected.
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Takahashi, Ken'ichi, et Mitsuo Suzuki. « Dicotyledonous Fossil Wood Flora and Early Evolution of Wood Characters in the Cretaceous of Hokkaido, Japan ». IAWA Journal 24, no 3 (2003) : 269–309. http://dx.doi.org/10.1163/22941932-90001597.

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Fossil woods are abundant in the Cretaceous Yezo Group in Hokkaido, Japan, in strata of Albian to Santonian ages. From 144 dicotyledonous samples, fourteen species representing 10 genera were identified: Castanoradix cretacea gen. et sp. nov., C. biseriata gen. et sp. nov., Frutecoxylon yubariense gen. et sp. nov., Hamamelidoxylon obiraense sp. nov., Icacinoxylon kokubunii sp. nov., I. nishidae sp. nov., Magnoliaceoxylon hokkaidoense sp. nov., Nishidaxylon jezoense gen. et sp. nov., Paraphyllanthoxylon cenomaniana sp. nov., P. obiraense sp. nov., Plataninium jezoensis sp. nov., P. ogasawarae sp. nov., Sabiaceoxylon jezoense gen. et sp. nov. and Ulminium kokubunii sp. nov. All 14 species are new and four of the 10 genera are new. Five genera (lcacinoxylon, Magnoliaceoxylon, Paraphyllanthoxylon, Plataninium and Ulminium) already are known from the Cretaceous and Tertiary, one (Hamamelidoxylon) previously is known only from the Tertiary. The species distribution by age is: Albian: one species; Cenomanian: four species in four genera; Turonian: ten species in eight genera; Coniacian: six species in five genera; Santonian: eight species in seven genera. The two specimens of Icacin oxylon kokubunii from the Albian are the oldest records of dicotyledonous woods in Japan.
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Prasad, M., J. S. Antal et V. D. Tiwari. « Investigation on plant fossils from Seria Naka in the Himalayan foot-hills of Uttar Pradesh, India ». Journal of Palaeosciences 46, no 3 (31 décembre 1997) : 13–30. http://dx.doi.org/10.54991/jop.1997.1344.

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A floral assemblage consisting of leaf-impressions recovered from the Lower Siwalik sediments of Seria Naka, about 30 km north-west of Tulsipur town in Gonda District of Uttar Pradesh, India has been described and discussed in the present paper. The assemblage comprises 10 taxa belonging to seven dicotyledonous families - Anonaceae, Flacourtiaceae, Polygalaceae, Sapindaceae, Anacardiaceae, Fabaceae and Ebenaceae. An analysis of the floral assemblage with respect to the distribution pattern of modem equivalent taxa reveals the prevalence of warm and humid climates in the region during the deposition of these sediments. The fossil flora also indicates that tropical evergreen forests with few moist deciduous plants were flourishing around Seria Naka in the Himalayan foot-hills during Middle Miocene in contrast to the mixed deciduous type of present-day forests. Further, the presence of some Malayan elements like Goniothalamus meboldii, Mitrephora macrophylla and Nephelium glabrum is phytogeographically important supporting the view of the migration of some taxa from Southeast Asia to the Indian subcontinent during the Neogene.
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Thèses sur le sujet "Dicotyledonous flora"

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Bhujel, Rambahadur. « Studies on the dicotyledonous flora of Darjeeling district ». Thesis, University of North Bengal, 1996. http://hdl.handle.net/123456789/875.

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Monasterio, Sarmiento Maximina. « Recherches écologiques sur les Espeletia du Paramo désertique des Hautes Andes tropicales du Venezuela ». Paris 6, 1986. http://www.theses.fr/1986PA066320.

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On étudie les caractéristiques morphologiques individuelles : une rosette de feuilles épaisses à l'extrémité d'un tronc que protège la litière des feuilles mortes depuis la formation de la plante, c'est à dire plus de 150 ans chez les plus âgées. On analyse ensuite les caractéristiques démographiques de la population, sa répartition par classes d’âge, son taux de renouvellement, sa production biologique.
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Foury, Claude. « Quelques aspects du developpement de l'artichaut (cynara scolymus l. ) issu de semences : analyse plus particuliere de la floraison en conditions naturelles ». Paris 6, 1987. http://www.theses.fr/1987PA066169.

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Etude faite pour 3 categories de contraintes : application en selection, absence d'enceinte climatisee, encombrement de la plante. Approche principale par l'echelonnement des semis. Etude des exigences en froid. Effets des traitements au ga::(3). Definition de regles de culture a partir de plants de semis. Etablissement de processus experimentaux de culture sequentielle en conteneur
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Livres sur le sujet "Dicotyledonous flora"

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P, Singh M. Flora of Patna : Dicotyledones. New Delhi : International Books & Periodicals Supply Service, 1986.

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Nicolson, Dan H. Flora of Dominica. Washington, D.C : Smithsonian Institution Press, 1991.

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Friedmann, F. Flore des Seychelles. Paris : Editions de l'Orstom, 1994.

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4

Keng, Keng Ro-Siu Ling, dir. The concise flora of Singapore. Singapore : Singapore University Press, National University of Singapore, 1990.

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5

Phyu, Khin Lay, et Khin Lay Phyu. Polypetalous dicotyledons (angiosperm) flora of Ywa-ngan and its surrounding area. [Mandalay] : Mandalay University, 1997.

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Phyu, Khin Lay. Polypetalous dicotyledons (angiosperm) flora of Ywa-ngan and its surrounding area. [Mandalay] : Mandalay University, 1997.

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7

The European garden flora, flowering plants : A manual for the identification of plants cultivated in Europe, both out-of-doors and under glass. 2e éd. New York : Cambridge University Press, 2011.

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P, Singh M. Flora of Patna (Dicotyledones). International Books & Periodicals Supply Service, 1986.

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9

Judziewicz, E. J., et A. R. Gorts Van Rijn. Flora of the Guianas : Series A : Phanerogams : Poaceae. Balogh International, Incorporated, 1990.

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A. R. Gorts Van Rijn, E. M. Zardini et P. H. Raven. Flora of the Guianas : Series A : Phanerogams : Onagraceae. Balogh International, Incorporated, 1991.

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Chapitres de livres sur le sujet "Dicotyledonous flora"

1

Drinnan, Andrew N., Peter R. Crane et Sara B. Hoot. « Patterns of floral evolution in the early diversification of non-magnoliid dicotyledons (eudicots) ». Dans Early Evolution of Flowers, 93–122. Vienna : Springer Vienna, 1994. http://dx.doi.org/10.1007/978-3-7091-6910-0_6.

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