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Landscape value  Ecology - Horticulture ]

Dictionary of botanic terminology - index of names

 
     
  The relative value or importance of a plant in relation to its use in building landscape views.  
     
The landscape value of a plant is an evaluation based on general consensus because of its special quality (although this evaluation can be confounding, because lacks universally accepted guidelines)
Special qualities used to define the landscape value include perceptual, aesthetic, architectural, and ecological aspects such as: scenic beauty, ornamental value, form, colour, growth habits, flowering, fruiting characteristics, structural strength, longevity, insect and disease resistance, and general maintenance requirements.
     

 


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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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