| Home | E-mail | Cactuspedia | Mail Sale Catalogue | Links | Information | Search  |

 
 
 
Intergeneric (hybrid) [ Biology - Genetics - Taxonomy ]

Dictionary of botanic terminology - index of names

 
     
  A hybrid between members of two or more genera.  
     


x Ferobergia
(Intergeneric hybrid between Freocactus and Leuctembergia)

Hybrids derived from crossing two species, each of a different genus. A viable example is x Ferobergia, a hybrid between two cacti of the genus Ferocactus and of the genus Leuchtembergia.
The more distant the relation between the two genera, the greater the difficulty of intergeneric hybridisation. Genera that generate intergeneric hybrid are always genetically related members of the same taxonomic Tribe . Many intergeneric hybrids are infertile.

The intergeneric hybridization (Cross breeding) is widely used for the creation of new type of plants and cultivars using different species (or hybrids) from two or more different genera.


NOTE: Intergeneric hybrids should not be confused with chimaeras.

     

 


Advertising



 

 

1


 
 
 
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
     

 

 

 

| Home | E-mail | Cactuspedia | Mail Sale Catalogue | Links | Information | Search  |