The seasonal development characteristic of different rhododendrons taxa and cultivars in Northern Lithuania. 1. Leafing peculiarities

作者：Malciute Aurelija^*; Naujalis Jonas Remigijus; Sauliene Ingrida

来源：Zemdirbyste-Agriculture, 2010, 97(4): 107-114.

• Rhododendron
• seasonal development
• leafing peculiarities
• phenorhythmotype

In scientific and educational collections, rhododendrons, like other introduced plants, are most often, although certainly not always, grouped considering the geographical factor, i.e. on the basis of their distribution ranges or places of origin. But rhododendrons could be very successfully grouped by particular phenorhythmotypic features. The rhododendron groups formed according to these criteria would be much longer attractive to the visitors of botanical gardens.
Based on long term research results, the rhododendrons grown in Northern Lithuania were grouped into specific phenorhythmotypes according to seasonal character of leaf unfolding, indexes of the end of leaf drop and average duration of leafing.
According to seasonal character of leafing, deciduous rhododendrons could be divided into phenorhythmotypes of 1) early leafing and 2) moderately early leafing. According to the indexes of the end of leaf drop deciduous rhododendrons could be divided into phenorhythmotypes of 1) early end of leaf drop, 2) moderately early end of leaf drop and 3) rather late end of leaf drop. According to the average leafing duration the deciduous rhododendrons could be divided into phenorhythmotypes of 1) short leafing duration, 2) moderate leafing duration and 3) long leafing duration.

• 出版日期2010