(Rosaceae), a new bramble species from south-central Poland.

Based on field research in south-central Poland, supplemented with a review of herbarium materials, we identified a stable bramble biotype with a range large enough (190 km distance between the outermost stands) to be described as a new regional agamic species, It belongs to the series Subthyrsoidei(sect. Corylifolii). Although has a unique combination of features, it can be potentially mistaken for .

Correction: Pollen morphology of Polish species from the genus Rubus L. (Rosaceae) and its systematic importance.

[This corrects the article DOI: 10.1371/journal.pone.

Pollen morphology of Polish species from the genus Rubus L. (Rosaceae) and its systematic importance.

The genus Rubus L. (Rosaceae) not been investigated satisfactorily in terms of palynology. This genus is taxonomically very difficult due to the large number of species and problems with their delimitation, as well as very different distribution areas of particular species.

Comparative Pollen Morphological Analysis and Its Systematic Implications on Three European Oak (Quercus L., Fagaceae) Species and Their Spontaneous Hybrids.

Pollen morphology of three parental Quercus species (Q. robur L., Q.

Volatiles as Chemosystematic Markers for Distinguishing Closely Related Species within the Pinus mugo Complex.

Headspace solid-phase microextraction (HS-SPME) coupled to GC/MS analysis was used to identify the constituents of pine-needle volatiles differentiating three closely-related pine species within the Pinus mugo complex, i.e., P.

Composition of essential oils isolated from the needles of Pinus uncinata and P. uliginosa grown in Poland.

The compositions of mountain pine (Pinus uncinata) and peat-bog pine (P. uliginosa) needle essential oils were investigated. Enantiomeric compositions of selected monoterpene hydrocarbons were also examined.