Rosa canina (wild rose, bush, bramble, dog rose, rosehip) is a shrub commonly encountered in the wild flora of Romania, spread from the coast up to altitudes of 1200 m (1700), with low requirements to pedoclimatic factors. From this species are used the false-fruits (Cynosbati fructus) mature, dried, harvested from wild flora or cultures, with food and therapeutic importance, due to their multiple properties, but mostly because of its high content of vitamin C. In this way, it were studied the germoplasm sources existent in some areas of Oltenia (Romania) to identify valuable biotypes from biochemically and technologically point of view. The results indicate a high and very high variability of the analyzed parameters. Thus, the content of TSS was recorded between 10% (B2) and 18% (M1), vitamin C varied from 53mg/100g (B3) to 563 mg /100g to populations (S1 , S3) and acidity from 1.4% (B3) to 3.6% (M4). Recorded values for the mass of 100 fruit, between 117g (A1) and 286g (B3 and T4) and the percentage of pulp/100g fruit ranged from 49.2 (M1) and 66.5 (T1).

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The overall objective of this research was to contribute to a better knowledge of the phytosociology, ecology and distribution of the plant community formed by Myricaria germanica (false tamarisk) and the willow species Salix purpurea. This plant community has an important role in reducing the speed and strength of the water flow during floods. The description was based on cover‐abundance data for the faithful, dominant, characteristic and companion species of this plant community. A predominance of Myricaria germanica was observed when analysing the phytocoenoses, as the species finds in this area favourable ecological conditions for an abundant development. Salix purpurea presents a small abundance-dominance or in some phytocoenoses may even lack. The field research also revealed the excessive development of the species Calamagrostis pseudophragmites in some areas, related mostly with the effect of human activities. The anthropogenic disorders have induced modifications in the floristic physiognomy and compositions of the phytocoenoses, favouring also the invasion of opportunistic species such as Ambrosia artemisiifolia, Impatiens glandulifera, Phytolacca amearicana, Amorpha fruticosa, Erigeron annuus, which continuously extend in the studied territory. As Myricaria germanica and Salix purpurea phytocoenoses suffer a great decline throughout Europe, the habitat built by these species was declared of interest and was included in the Habitats Directive.   ********* In press - Online First. Article has been peer reviewed, accepted for publication and published online without pagination. It will receive pagination when the issue will be ready for publishing as a complete number (Volume 47, Issue 3, 2019). The article is searchable and citable by Digital Object Identifier (DOI). DOI link will become active after the article will be included in the complete issue. *********

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