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Ovoid  (also Ovoidal) [ Biology - Botany ]
Synonym: Egg-shaped, Egg-like

Dictionary of botanic terminology
index of names

 

     
  Ovoid or ovoidal  means  with the solid form of an egg , broadly rounded at the base , becoming narrowed above  
     
[ From Latin "ovum" meaning  “egg” ]

Used to describe a fruitsegment or similar plant part that are shaped like an egg.
It is is applied to 3-dimensional forms.

Compare with ovate (2-dimensional forms)

     
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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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