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The Dendrologic Section




Emplacement and area

The Dendrologic Section (dendrarium) is situated in the southern extremity of the "A. Fatu" Botanical Garden, on a versant presenting western general exposition and approximately 7-80° inclination average. The area of this section is 17,9 ha.

Description

The collections of trees and shrubs have been grouped together taking into account the genera that are including the respective species and also the ecological requests of the plants. The Dendrologic section is designed in mixed to landscape architectural styles. A forest belt preponderantly composed of rustic indigenous species characterized by dense foliage protects the perimeter of this section. The dendrarium presents a rather rectangular configuration and a symmetry axis oriented north – south marking the limit between Gymnospermae and Angiospermae subsections. The circulation alleys are narrow, intersect the symmetry axis and realize the connection between all subsections.

The plantation presenting a preponderant ameliorative role occupies approximately 33% of the section area and includes: Elaeagnus angustifolia (Russian olive), Populus alba (white poplar), Acer campestre (hedge maple), Lonicera tatarica (tatarian honeysuckle) and Symphoricarpos albus (common snowberry).

The plantation presenting a preponderant role in landfalls stabilization occupies approximately 2% of the section area and includes species characterized by deep penetrating roots: Quercus robur (oak), Juglans regia (common walnut) and Juglans nigra (black walnut).

The plantation presenting decorative importance occupies about 9% of the section area, includes various collections constituted depending on the genera and is represented by coniferous species clusters: Pinus strobus (estern white pine), Picea pungens 'Argentea' (blue spruce), Thuja occidentalis 'Fastigiata' (arbovitae), Juniperus virginiana, Juniperus communis 'Hibernica', Juniperus horizontalis (creeping juniper), Pinus nigra var. nigra (Austrian pine) etc.

The rest of the section area is occupied by various collections constituted depending on genera and ecological requests of species. In the proximity of the Munteni street can be admired the willows collection (Salix alba – white willow, Salix babylonica – Babylon willow, Salix fragilis – crack willow), the poplars collection (Populus nigra – Lombardy poplar, Populus alba – white poplar, Populus tremula – common aspen), Tamarix ramosissima – saltcedar, Hyppophae rhamnoides – seaberry or the lilac collection (Syringa amurensis – Amur lilac, Syringa villosa – villous lilac) etc.

Hereinafter, on the same direction, there is a little square whence the visitors can walk on the cornel trees alley (Cornus hemsleyi, Cornus torreyi, Cornus carlesi etc.), on the maple trees alley (Acer pseudoplatanus ‘Purpureum’, Acer pseudoplatanus ‘Cuculatum’, Acer majalis etc.), on the oaks alley (Quercus robur, Quercus rubra, Quercus cerris etc.), or to see the barberries collection (Berberis sibirica, Berberis thunbergii, Berberis julianae etc.), the hornbeams collection (Carpinus betulus, Carpinus orientalis etc.) and the nut trees collection (Corylus colurna, Corylus avellana and Corylus maxima).

In the northern half of this section there are the sorbs trees collection (Sorbus aucuparia, Sorbus torminalis, Sorbus domestica f. pyriformis etc.), the cotoneaster collection (Cotoneaster horizontalis, Cotoneaster microphyllus etc.) and the ash trees collection (Fraxinus ornus, Fraxinus excelsior, Fraxinus pallisiae etc.). The gymnospermous collection includes species and varieties of the Abies, Chamaecyparis, Ginkgo, Juniperus, Taxus, Thuja, Picea, Pinus and Pseudotsuga genera.

To provide the planting material necessary to diversify the existing collections, the Dedrologic section dispose of a nursery divided into:

  • the multiplication by seeds parcel – seeds germination is realized both in flower pots and in flower beds;
  • the a-gamic multiplication parcel – by cuttings, slips and grafts;
  • the pricking out parcel, where the plantlets are cultivated until the moment of their shifting in the definitive place.


University "Alexandru Ioan Cuza" of Iasi

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