MC

Current Trends in Science and Technology

an Open Access Publication ISSN: 0976-9730 | 0976-9498

Botany (Plant Science)

Dacrycarpous: a small podocarpean genus

Dr Teena agrawal
Assistant professor, Banasthali University, niwai Email Id: tagarwal02@gmail.com
Online First: February 14, 2018
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Abstract

Gymnosperms are the plants of the great values, they have the assemblage of the metabolites and the evolutionary features .seed without fruit is the prominent features of the gymnospersm, generally conifers are dominant form of the gymnosperms. Since cycadales are represented by the only 11 genera’s of the relict and rare distribution .conifers are presented by the families ,these are the Podocarpaceae ,Pinaceae ,and the cupreseeceae .Podocarpaceae are the giant tree with the arborescent habits ,they have the height of the 50-60 meters and the bark of the tree is of the various shape and it appears in the form of the plates and the sheets .They have the long male and the female cone with the catkin like appearances and the seed are in the cupules which are fleshy in structure .here in this review article we are presenting some of the aspects of  genus entitled as the Dacrycarpus   of the podocarpaceae family .this genus is giant tree with the scales on the bark and they represent the whole of the charters of the podocarpaceae . Australia, New Zealand and New Caledonia are the endemic point of their distribution.IUCN categories the tree as the endangered since continuous habitat destruction is the threats of the species.

Keyword : Gymnosperms, evolution, habitat destructions, arborescence, IUCN.

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Feb 14, 2018
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Feb 14, 2018
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References

1. G. J. Jordan. 1995. Extinct conifers and conifer diversity in the Early Pleistocene of western Tasmania. Review of Palaeobotany and Palynology 84(3): 375-387. "Two new, extinct species of conifer are described from Early to possibly Middle Pleistocene sediments at Regatta Point, western Tasmania. Dacrycarpus carpenterii Jordan, sp. nov. (Podocarpaceae) has morphological similarities to extant D. dacrydioides from New Zealand." 2. Christopher N. Page. 1990. "Podocarpaceae" pages 332-346. In: Klaus Kubitzki (general editor); Karl U. Kramer and Peter S. Green (volume editors) The Families and Genera of Vascular Plants volume I. Springer-Verlag: Berlin;Heidelberg, Germany. ISBN 978-0-387-51794-0 3. James E. Eckenwalder. 2009. Conifers of the World. Timber Press: Portland, OR, USA. ISBN 978-0-88192-974-4 Dacrycarpus At: Podocarpaceae At: The Gymnosperm Database 4. Farjon, A. 2013. Dacrycarpus cinctus. The IUCN Red List of Threatened Species 2013:
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References

1. G. J. Jordan. 1995. Extinct conifers and conifer diversity in the Early Pleistocene of western Tasmania. Review of Palaeobotany and Palynology 84(3): 375-387. "Two new, extinct species of conifer are described from Early to possibly Middle Pleistocene sediments at Regatta Point, western Tasmania. Dacrycarpus carpenterii Jordan, sp. nov. (Podocarpaceae) has morphological similarities to extant D. dacrydioides from New Zealand."
2. Christopher N. Page. 1990. "Podocarpaceae" pages 332-346. In: Klaus Kubitzki (general editor); Karl U. Kramer and Peter S. Green (volume editors) The Families and Genera of Vascular Plants volume I. Springer-Verlag: Berlin;Heidelberg, Germany. ISBN 978-0-387-51794-0
3. James E. Eckenwalder. 2009. Conifers of the World. Timber Press: Portland, OR, USA. ISBN 978-0-88192-974-4 Dacrycarpus At: Podocarpaceae At: The Gymnosperm Database
4. Farjon, A. 2013. Dacrycarpus cinctus. The IUCN Red List of Threatened Species 2013:
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