Marisia - Maros Megyei Múzeum Évkönyve 35/2. (2015)

Botany

Sorina Stefánia MATACÄ

For each syntaxonomic unit, territorial spreading, floristical composition, biological structure, phytogeographic elements and ecological behavior correlated with plants’ needs for humidity, temperature and soil pH are mentioned in the paper. A diploid and polyploid species graphic distribution was made as well.

Results and discussions

Cls. Quercetea pubescenti-petraeae (Oberd. 1948, 1957) Jakucs 1961

Ord. Orno-Cotinetalia Jakucs 1961

Al. Syringo-Carpinion orientalis Jakucs 1961

Ass. Syringo-Fraxinetum orni Borza 1958

The lilac forest from Ponoarele (Syringo-Fraxinetum orni) shows resemblance of Balkan “sibliacuri” (Syringo-Carpinetum orientalis), reflecting the conditions of a submediteranean climate ideal for Balkan — Illyrian elements.

In the phytogeographical assignation written byAl. Borza (1931, 1957, 1965), the Ponoarele territory is located at the crossroad between the Banatului constituency and the Getic constituency of Oltenia, which belong to the Dacian-Illyrian province, from the euro-Siberian region.

Comparing the bioforms spectrums of the 2 associations (Fig. 1; Fig. 2), one can notice the predominance of hemicryptophytes (47%).

Regarding the rest of bioforms, a slight difference can be noticed:

— phanerophytes are more numerous when it comes to ass. Syringo-Fraxinetum orni (21%) compared to ass. Syringo-Carpinetum orientalis (18%)

— geophytes from ass. Syringo-Fraxinetum orni (19%) are better represented than ass. Syringo-Carpinetum orientalis (7%)

— therophytes from ass. Syringo-Fraxinetum orni (8%) are weaker in representation compared to ass. Syringo-Carpinetum orientalis (20%).

Fig. 1: Bioforms spectrum of Syringo- Fig. 2: Bioforms spectrum of Syringo-Carpinetum

Fraxinetum orni association orientalis association (Matacä, 2005)

Regarding the ecologic clues, we can notice a resemblance between the 2 associations (Fig. 3; Fig. 4):

— by humidity: xero-mesophilic species (ass. Syringo-Fraxinetum orni — 41.33%; ass. Syringo-Carpinetum orientalis — 49.72%) and xerophilic species (ass. Syringo-Fraxinetum orni - 42.66%; ass. Syringo-Carpinetum orientalis - 19.55%).- by temperature: micro-mesotherms species (ass. Syringo-Fraxinetum orni - 62.33%; ass. Syringo-Carpinetum orientalis — 58.65%) and moderate-thermophilic species (ass. Syringo- Fraxinetum orni - 15.58%; ass. Syringo-Carpinetum orientalis — 28.49%).

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