COVID 19 UPDATE

                     Positive cases.                    Deaths

World.           467594.                                  21181
India.             649.                                        13

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Phytogeography Practical

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Phytogeography is the study of distribution of plant species and elucidation of origin of flora. The word " phytogeography" was derived from two Greek words 'Phyto = Plant' and ' Geografia= Geography '. It is controlled by evolution, climate,  and geographical barriers. Chorology, the mapping of plant boundary, is one of the important core principles of the study of plant distribution to decode the factors like evolution and environmental barriers which shape green footprint of our planet. D.Chatterjee in 1962 divided India into nine phytogeographical regions,viz.:- (1) Western Himalayas,(2) Eastern Himalayas, (3) Indus Plain ,(4) Gangetic Plain ,(5) Assam, (6) Central India, (7) Deccan ,(8) Malabar ,and (9) Andaman and Nicobar Islands. Geographical location,Type of vegetation, average rainfall, altitude, and two major plants of each regions are listed below:- Western Himalayas: Kashmir, Northern Punjab,Kumaon ranges of Uttranchal Subtr...
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Mushroom Cultivation

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Morphology of Angiosperms# Inflorescence

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   An inflorescence is the arrangement of flowers on an floral axis (rachis=a long simple or branched peduncle; peduncle= the main axis of an inflorescence ) of a plant .    All inflorescence are mainly grouped into three types:  (i) Racemose/ indefinite / indeterminate :the main axis or rachis continues to grow indefinitely  having terminal apical bud (not floral bud ) and flowers produce acropetally (from lower to upper on the axis). (ii) Cymose/definite/determinate : the main axis ends in a flower at early stage and rest flowers open basipetally (from upper to lower on the axis). (iii) Mixed: an infloresence having both of racemose and cymose characters . (A) Types of Racemose inflorescence Main axis / peduncle is not branched  . (a) The peduncle is vertically elongated: 1. Raceme: all flowers pedicellate/stalked and length of all pedicels are equal . e.g.  Radish  ( Raphanus sativus ), mustard ( Brassica nigra )  of ...
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