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Dictionary: BOTANICAL & TECHNICAL TERMINOLOGY
Glossary of terms beginning with R

CACTUS ART
NURSERY

Cultivation and Mail Sale
of Cacti and Succulents.

 
 
A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z

R

Raceme [ Botany ]

Rachis [ Botany ]

Radial [ Botany ]

Radial spines [ Botany ]

Radiation [  Physics - Ecology - Climatology ]

Radicle [ Botany ]

Rain  [ Meteorology ]

Rain forest [ Ecology ]

Rainstorm [ Meteorology ]

Rainy season [ Climatology ]

Raised bed [ Horticulture ]

Ramet [ Botany ]

Random [ Botany ]

Range [ Biology ]

Reaction [ Biology - Physiology - Phytopathology ]

Re- [ Prefix ]

Receptacle [ Botany ]

Receptive [ Biology ]

Recessive [ Genetics ]

Reclassification [ Genetics ]

Recurved [ Botany ]

Red spider mites [ Taxonomy ]

Redescription [ Taxonomy ]

Reflexed  [ Botany ]

Regeneration  [ Botany - Biology ]

Regrowth  [ Botany - Biology ]

Regulator [ Biology - Physiology - Genetics ]

Rehydrate [ Botany - Biology ]

Relation - Related [ Biology - Genetics - Evolution]

Relatives [ Biology ]

Relictual [ Biology - Ecology ]

Replanting [ Horticulture ]

Repotting [Horticulture ]

Reproduction [ Biology ]

Reproductive [ Biology - Botany - Ecology ]

Reproductive meristem [ Botany ]

Reproductive organ [ Biology - Botany ]

Reproductive phase [ Biology -Botany ]

Reproductive potential [ Biology - Ecology ]

Reproductive system [ Biology - Botany ]

Reserve [ Biology ]

Reserve compound [ Biology ]

Reservoir [ Horticulture ]

Resin [ Botany - Biochemistry]

Resistance [ Botany- Horticulture]

Respiration [ Biology ]

Retention [ Biology - Pedology - Physiology ]

Reticulated [ Botany ]

Retraction [ Botany ]

Retrorse [ Botany ]

Retuse [ Botany ]

Reversion [ Genetics - Horticulture ]

Revolute [ Botany]

Rhizoctonia [ Phytopathology ]

Rhizome [ Botany ]

Rhizosphere [ Botany - Biology ]

Rhomboid - Rhomboidal  [ Botany ]

Rib [ Botany ]

Rigid [ Botany ]

Rim stamen [ Botany - Echinopsis morphology]

Rime frost [ Meteorology ]

Ring fasciation [ Botany ]

Ripe - Ripening [ Botany ]

RNA [ Genetics ]

Rock [ Geology - Pedology - Ecology - Agronomy  ]

Rodents [ Biology - Agronomy - Horticulture ]

Root [ Botany ]

Root ball [ Horticulture ]

Root cap [ Botany ]

Root crown [ Botany ]

Root graft [ Botany ]

Root hair [ Botany ]

Root prone [ Horticulture ]

Root pruning [ Horticulture ]

Root resistant [ Horticulture ]

Root rot [ Phytopathology ]

Root succulent [ Botany ]

Root system (or Apparatus) [ Botany ]

Root tip [ Botany ]

Rooting hormones [ Horticulture ]

Rooting medium [ Horticulture ]

Rootlet [ Botany ]

Rootstock [ Botany ]

Rosette [ Botany - Biology - Pathology ]

Rosulate [ Botany]

Rot [ Botany - Horticulture - Phytopathology ]

Rot prone [ Botany - Horticulture ]

Rotate[ Botany ]

Rounded [ Botany ]

Rudimentary [ Biology -Botany ]

Rugose [ Botany ]

Runner [ Botany ]

Rustic [ Horticolture ]

 
 

 

 

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
     

 

 

 

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