Plant species important for the conservation of species diversity
Plantago schwartzenberg (Plantago schwarzenbergiana Schur) is a Transylvanian-Pannonian endemic, a species of international importance for the preservation of global biodiversity (Stevanović, Vasić, 1995). This species has a significant ecological role because it represents a specific component of floristic and vegetation diversity of the Transylvanian – Pannonian region (Butorac, 1999). It grows in large numbers along the edge of the Okanj pond, on moist salt marsh together with puccinellia (Pucineliia distans subsp. Limosa) and sea aster (Aster tripolium subsp. Pannonicus). Plantago schwartzenberg is not rare in Banat salt marshes (Vuckovic, 1986; Knezevic, Boza, 1990; Knezevic, 1990, 1994).
Plumbago (Limonium gmelini O. Kuntze (Willd.) subsp. hungaricum (Klokov) Soó) is a Pannonian endemic, a distinct halophytic species that gives a light purple tone to the area during flowering in summer (Fig. 11). It is located on the southern border of its distribution in Bačka and Banat (Budak, et al., 1990).
Pucinellia distans subsp. Limosa is a Pannonian subendemic, a typical halophytic species that grows on wet depressions and low, periodically flooded parts of salt marshes, and builds a distinctive and recognizable zone. It is located on one of the southern borders of its distribution in Banat.
Aster sedifolius L. subsp. canus (Waldst. & Kitt) Merxm. is also a Pannonian subendemic species and is quite a common species in the Okanj area.
Creeping yellow-cress (Roripa sylvestris subsp. Kerneri Menyh.) has a Pannonian subendemic feature. It grows on moist and slightly saline meadows (Fig. 12).
Slika 13: Panonski zvezdan (Aster tripolium L. subsp. pannonicus (Jacq.) Soó)
Picture 16: Ornamental onion (Allium atropurpureum Waldst. & Kit)
Figure 17: Autumn squill (Scilla autumnalis L.)
Figure 18: White sticky catchfly (Silene viscosa (L.) Pers.)