acta societatis botanicorum poloniae - LV Zjazd Polskiego ...

‘Elegans’, ‘Stanwell Perpetual’, ‘Poppius’, ‘Fruhlingsduft’. The
most damaged in severe winters (2002/03, 2005/06, 2008/09)
and cut over 0– 10cm above ground were ‘Maigold’; ‘Golden
Wings’. On the average the majority of flower buds of most of
the cultivars appeared at the beginning May and blossomed
out early-in the first 20 days of May. The latest of all to begin
flowering was ‘Golden Wings’ which began flowering at the
beginning of June. The flowering continued for 3– 4 weeks, by
‘Golden Wings’, it repeated well and by ‘Stanwell Perpetual’;
less. Ornamental fruits were produced by ‘Poppius’ only. The
shrubs achieved between 0,8m (‘Golden Wings’, ‘Elegans’) to
2,5m. The shrub ‘Fruhlingsduft’ was often attacked by blackspot.
The most often attacked was ‘Harison’s Yellow’. ‘Maigold’
demand little care.
BIOLOGY OF FLOWErING ANd POLLEN PrOdUC-
TIVITY OF lAburnum AnAGyroides MEd.
Stawiarz Ernest, Wróblewska Anna. University of Life Sciences
in Lublin, 15 Akademicka St., 20-950 Lublin, Poland,
ernest.stawiarz@up.lublin.pl, anna.wroblewska@up.lublin.pl
Investigations carried out in 2004– 2006 concerned the biology
and the abundance of flowering as well as pollen productivity
of Laburnum anagyroides Med. In the climatic conditions of
Lublin, flowering of this species lasted from the second decade
of May to mid-June. Laburnum developed flowers in pendulous
racemes, with a length of 9– 22 cm (mean 14.9 cm). During the
growing season, one shrub produced 800– 3200 racemes. The
number of flowers in the raceme reached 14– 35 (mean 24.6).
Single flower blooms, depending on the weather conditions,
took 5– 13 days, and for inflorescence 7– 18 days. Plants reached
full flowering in the last week of May. Flowers evolved gradually
from the base to the top of inflorescence. Another dehiscence
starts already at the loose bud stage of flower development. The
average size of pollen grains was 24.18 x 24.04 µm. The mean
Botanical Gardens and Arboreta
pollen weight produced by 10 flowers reached 5.1– 7.7 mg (mean
6.1 mg). One raceme of Laburnum anagyroides may provide
10.1– 18.1 mg of pollen i.e. 11.6– 48.1 g per one shrub.
THE HISTOrY ANd COLLECTIONS OF THE ExPErI-
MENTAL ANd TEACHING GArdEN OF THE FACUL-
TY OF BIOLOGY ANd ENVIrONMENTAL PrOTECtIoN,
UNIvERSIty of ŁóDź
Stefaniak Agnieszka 1 , Wolski Grzegorz J. 2 University of
Łódź, Department of Geobotany and Plant Ecology, 12/16
Banacha St., 90-237 Łódź, Poland, 1 stefa@biol.uni.lodz.pl;
2 gjwolski@bilo.uni.lodz.pl
The Experimental and Teaching Garden run by the Faculty
of Biology and Environmental Protection of the University of
Łódź, Poland is located in the city centre. It occupies 1,02 ha. It
is the fifth didactic Garden in the university’s history. The Garden
on Banacha Street has been in existence since 1985. It provides
a scientific and didactic base for the students and employees
of the University of Łódź. It is made up of of two main parts:
a collection of trees and bushes and a collection of green plants.
The dendrologic collection has 295 species and varieties of trees
and bushes; both indigenous and foreign. The collection of the
green plants amounts to 498 species and varieties, represented
in the majority of cases (358 taxons) by indigenous flora. The
Garden has 105 species which are environmentally protected in
Poland. Among the above-mentioned species, there are 16 that
can be found in the Polish Plant Red Data Book and 18 from the
Red List of Vascular Plants in Poland. There are also 3 types of
habitats from the European Ecological Natura 2000 Network
(Carlina onopordifolia, Marsilea quadrifolia, Galium cracoviense)
in the collections. Thirty-one species of bryophytes were
found in the Garden that appeared spontaneously or were introduced
when planting the vascular plants. Within this bryophyte
group, 5 species are under partial protection.