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Plumose   [ Botany - Biology  ]

Dictionary of botanic terminology - index of names

Synonyms:  Plumate, Plumed, plume-like, Feathered, Feathery
Adverb: Plumosely
Noun: Plumosity
     
  1. (Zoology) Having feathers or plumes.
2.
(BIology/Botany) Having a feather growths; feathered.
3.
(BIology/Botany) Resembling a plume; often from long dense pubescence, feathery.
 
 
[ From Latin "plumosus"  "feathery" > From "pluma"  "down feather" ]
 

Plumose spine in a seedling of Turbinicarpus beguinii.
The term plumose is used in botany to describe a plant which is feathery in appearance often from long dense pubescence or having an ornamental plume or feathery tuft.

A plumose organ is a plant part having fine elongate hairs branching from an axis on each side.
For example:  a plumose spine, a plumose leaf; the pappus of some Asteraceae, or body hairs with hairlike branches..
 
 
 

 


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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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