L. Lőkös szerk.: Studia Botanica Hungarica 27-28. 1996-97 (Budapest, 1978)

Penksza, Károly, Salamon, Gábor, Káder, Ferenc, Kapocsi, Judit, Gyalus, Boglárka; Kemény, Gabriella: Floristical and coenological data to the western territory of Körös-Maros region I.

new huge population was found between Kis-homok and Hódmezővásárhely (2, Fig. 1) that is until now the largest known population in Hungary. It has no coenological samples made in Hungary yet. Since the habitat was found after mowing here we publish the flora list only without cover rates. About the coenosystematical status of Trifolium subterraneum HORVAT et al. (1974) gave information. The coenosystematical status of this species is different according to the publications of different authors in several countries. The different opinion is not necessarily the result of the different views of authors, but the species play different role in the associations of various geographical units. Trifolium subterraneum can be found under wide range of habitat conditions. According to OBERDÖRFER (1954) in Greece this species can be found in dry grasslands on slopes, in the stands of Stipa tortilis subassociation and Plantago lagulopus subassociation of Poetum timoleontis Oberdorfer association. In the case of South Dalmatian grasslands it is mentioned as a species of the Vulpio-Lotion Horvatic association-group. Stands in Macedonia appear in more wet conditions. It is surprising that it occurs together with Cirsium canum, Orchis laxiflora, Ranunculus sardous, Lychnis flos-cuculi and Alopecurus pratensis as the typical member of the Trifolietosum nigricenti-subterranei Micevski and Ranunculetosum neapolitani subassociation. Examining the synthetic table of sub-Mediterranean dry grasslands in the samples taken by HORVATIC (1949) near Dubrovnik Trifolium subterraneum can be found in Psirulo-Trifolietum cherleri Horvatic association. According to SIMON'S (1992) nature conservation categories the status of this species is natural pioneer (TP), of course without any ground, since it is a protected species by law, and with its only one known habitat it must be among the unique species. Among the floristical data the presence of Lythrum tribracteatum Salzm. must be emphasized. This species is only mentioned in the works of TlMÁR (1952a, 1954) and SOÓ and MÁTHÉ (1938) only from a few places, mainly from the areas near the River Tisza. From Crisicum the following data can be found: ricefields of Nagysziget in Hódmezővásárhely (TlMÁR 1954), Vésztő, Malompuszta, Mezőtúr, Malomfok (Soó and MÁTHÉ 1938). We have gone through on some of the above mentioned territories, but any similar habitats have not been found yet. In the herbarium there were no specimens from Crisicum. According to the herbarium sheets, which were collected from some places near the rivers Duna and Tisza, specimens were not put into the collection after 1948. We found it on a mildly alkali wet area near Batida (9, Fig. 1). Interesting plant association of the soda-salty mud vegetation is Lythrum tribracteatum-Lythrum hyssopifolia ass. Slavnic (Table 1). This association was rediscovered if we accept the opinion of SOÓ according to which Cypero-Juncetum gnaphalietosum luteo-albi Bodrogközy, which was described near the river Tisza by BODROGKÖZY (1958) (In the work of SOÓ (1980) the date is wrong, be-