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Saxicole  [ Botany - Ecology  ]

Dictionary of botanic terminology - index of names

Synonyms: Saxatile, Saxicolous
 
     
  A rock dwelling species. Growing on or living among rocks.  
     
  Saxicole are plants that grows in rocky outcrops, rock crevices or cliffs, sometime it is suggested  that saxicoles are simply epiphytes that live on rocks, but  it’s not quite exact.
Saxicoles can be classified in two main categories:
  • Obligate saxicole: Plant that are found exclusively growing in rocky environment.
  • Facultative saxicole: Plant that can adapt either to rocky and other substrate.
     

 


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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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