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ŠUMARSKI LIST 5-6/2002 str. 40     <-- 40 -->        PDF

D. Kremer: CVATNJA NEKIH DRVENASTIH VRSTA TIJEKOM ZIME U BOTANIČKOM VRTU ... Šumarski list br. 5-6. CXXVI (2002). 273-286
SUMMARY: The time of the beginning, culmination and ending of flowering
was recorded during 1998, 1999 and 2000 on some species which flower
during the winter or early in the spring in the Botanical garden of the Faculty
of Natural Sciences and Mathematics University of Zagreb. Those were the
species of genus Chimonanthus, Cornus, Corylopsis, Forsythia, Hamamelis,
Jasminum, Lonicera and Sarcococca. It was found out that for the species
(´Chimonanthus praecox, Jasminum nudiflorum, Lonicera fragrantissima,
Lonicera xpurpusiij, which in good weather conditions flower during the
whole winter, we cannot predict the time of the beginning of flowering and
neither very often the time of the culmination of flowering. For those species
the time of flowering is under the strong influence of the weather conditions,
especially the average value of daily and monthly air temperature. Other
species (´Sarcococca spp., Corylopsis sinensis var. glandulifera, most species
from the genus Forsythia, Lonicera praeflorensj flower approximately at the
same time every year and only greater changes of weather conditions, especially
higher temperature in the second part of the winter, have influence on
these species. The species of the third group (Cornus mas, Corylopsis spicata,


C. willmottiae, Hamamelis japonica ´Zuccariniana´, Forsythia viridissimaj,
which flowered at the same time during the period of three year, are closely
related to the species of the second group. Generally, we can conclude that
species which flower earlier show more variability as regards the time of
flowering than species which flower later (at the end of winter or at the beginning
of spring). All species show the most stability according to the time of
ending of flowering, according to the time of culmination stability is less,
while the time of the beginning of flowering is the most variable.


Key words: phenology, time of flowering, Chimonanthus, Cornus,
Corylopsis, Forsythia, Hamamelis, Jasminum, Lonicera, Sarcococca