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Season [ Ecology - BotanyClimatology ]
Adjective: Seasonal
Adverb: Seasonally

Dictionary of botanic terminology - index of names

     
  (1) One of the natural divisions of the year based on distinctive weather conditions. In the North and South temperate regions, there are four seasons spring, summer, autumn (fall), and winter, while in tropical countries there are often only two, a dry season and a rainy season.

(2) A recurrent period of the year marked by special events, crops or activities  in a particular field or among plants and animals. For example: planting season, blooming season, growing season, tomato season ecc..
 

A season is an approximately three-month regularly recurrent periods into which the year is divided by the equinoxes and solstices or atmospheric conditions, Typically in temperate regions, the year is divided into four seasons: spring, summer, autumn (fall), and winter. Each season is classified by length of day and is characterized by specific meteorological or climatic conditions. Particular events or changes occurs in the different seasons as in plant growth and temperature. In the temperate and polar regions, seasons are marked by changes in the amount of sunlight, which in turn often cause cycles of dormancy in plants and hibernation in animals. These effects vary with latitude, and with proximity to bodies of water.

At any given time, regardless of season, the northern and southern hemispheres experience opposite seasons. When it is summer in the Northern hemisphere, it is winter in the Southern hemisphere,  and when it is spring in the Northern hemisphere it is autumn in the Southern hemisphere.

In tropical and even subtropical regions, there is no noticeable change in the amount of sunlight. it is more common to speak of the rainy (or wet, or monsoon) season and dry season, as the amount of precipitation and wind may vary considerably than the average temperature.
In the tropics many regions are subject to monsoons rain and wind cycles.
 

Seasonal (Adjective)
     
  Dependent on season; limited or available at specific times of year  
     

 


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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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