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Cyme [ Botany ]

Dictionary of botanic terminology - index of names

Synonym: Cymose  inflorescences,  Determinate inflorescence
Adjective: Cymose 
     
  A broad, flat-topped or domed determinate inflorescence, the central flowers maturing first.  
     
A cymose inflorescence  or determinate is a type of flower cluster terminating in a flower and blossoming in a sequence beginning with the uppermost or central flower; hence cymose means not continuing indefinitely at the tip of an axis, having a determinate growth.

A cyme is an iflorescence consisting of a central rachis terminated whose growing points are each terminated with a flower, so that continued growth depends on the production of new lateral flowers or new cymes.

     

 


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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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