Invasive Species Compendium

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Abstract Full Text

Phenological performance of Jacaranda mimosifolia D. Don (Jacaranda) and Ligustrum lucidum W. T. Aiton (Privet) species in urban trees.

Abstract

This study constitutes of a review on phenological aspects of two exotic species widely used in urban environments. Jacaranda mimosifolia D. Don. (jacaranda) is a deciduous species that tends to lose its leaves in winter, with sprouting between October and November. Flowering, the best ornamental attraction of this species, occurs between September and March, while fruiting can be seen along the year. In contrast, Ligustrum lucidum W.T. Aiton (privet) is a perennial species. The flower bud's emergence and anthesis of this species occur whether along the year or during shorter periods. Anthesis is higher between November and January, which is the time of the year when population's health can be affected by the potentially allergenic pollen. Privet has abundant fruiting from May to August, which is a phenological behavior that facilitates zoochoric dispersion, and may contributes to the invasion's potential, typical for this species in natural environments. Privet can be conditioned by variables such as photoperiod, temperature and precipitation, in at least, one of its phenological phases. New researches on the phenological behavior of jacaranda and privet species are important to clarify the progression on phenological phases, to investigate the possible interactions with environmental variables and growing conditions in urban trees.