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Ovate [ Botany ]

Dictionary of botanic terminology - index of names

     
  Ovate is   the condition where the shape of an organ or a part of an organism is narrower at the tip with the broadest part near the base.  
     
Ovate (from Latin ovum  “egg”) means egg-shaped  and is applied to 2-dimensional forms. Compare whit ovoid (3-dimensional forms)
(For example the shape of an ovate leaf )
  Compare with:  Obovate (inversely ovate), Ovoid, Obovoid (inversely ovoid), Oval  
Ovate leaf   [ Botany ]
     
  Ovate is the condition where the shape of a leaf or leaflet is narrower at the tip with the broadest part near the base closer to the petiole.  
     
See: leaf shape
     

 


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Holdfast roots  [ Botany  ]

Dictionary of botanic terminology - index of names

 
     
  Some species of climbing plants develop holdfast roots which help to support the vines on trees, walls, and rocks. By forcing their way into minute pores and crevices, they hold the plant firmly in place.  
     
Climbing plants, like the poison ivy (Toxicodendron radicans), Boston ivy (Parthenocissus tricuspidata), and trumpet creeper (Campsis radicans),  develop holdfast roots which help to support the vines on trees, walls, and rocks. By forcing their way into minute pores and crevices, they hold the plant firmly in place. Usually the Holdfast roots die at the end of the first season, but in some species they are perennial. In the tropics some of the large climbing plants have hold-fast roots by which they attach themselves, and long, cord-like roots that extend downward through the air and may lengthen and branch for several years until they strike the soil and become absorbent roots.

Major references and further lectures:
1) E. N. Transeau “General Botany” Discovery Publishing House, 1994
     

 

 

 

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