Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 73. (Budapest 1981)

Szujkó-Lacza, J.: Revision of three Astragalus taxa (Leguminosae) and their cenological relations

and the length and width of seed were measured by microscopic ocular micrometer under stereomicroscope, and thickness of the seed by the slide-thick measuring instrument. The mm- of seeds 4 were counted by -j-. abc modell, where _ length of seed _ width of seed thickness of seed The analysis of variance were made according to SVÁB (1973). The qualitative investigation also was made from the root to the seed of the three taxa (Table 1). The colour of seeds was identified according to MAERZ & REA PAUL (1950). Besides the taxonomical revision of the three Astragalus taxa I investigated also the communities in Hungary and in Czechoslovakia in which the Astragalus exscapus and the variety of it occur together. According to BRAUN-BLANQUET (1. c.) the "community" is mean here in s. str. as plant assotiation. The name of community is accepted after Soó (1973) in Hungary. Species nomenclature agrees with Soó in: JÁVORKA & CSAPODY (1975). The sample size is 5 X 10 m in both localities. The covering value of each species/sample was estimated in percentage value. The affinity of the two taxa to the communities was studied indirectly*, by used the similarity function of SOKAL and MICHENER (1958) for binary date (floristical composition of samples) and that of the HUMMON (1974) for coverage values and the WPGMA fusion technique (SNEATH & SOKAL 1973). The BP program package of the Botanical Department of the Hungarian Natural History Museum was run on the CDC-3300 computer of the Hungarian Academy of Sciences. The BP program package was constructed by L. HAJDU and M. RAJCZY. This program was applied here by M. RAJCZY. The floristical diversity of samples was counted by SHANNON (1948) and the evenness by PIELOU (1975). The sample was made by the help of J. HOLUB and M. HUSOVA in Czechoslovakia. RESULTS AND DISCUSSION The genera Astragalus was described by LINNÉ (1737, p. 215.): "Cal. Perianthium monophyllum, tubulatum, quinquedentatum, acutum, denticulis inferioribus. gradatim minoribus. Cor : Papillionacea Vexillum longis reliquis, lateribus reflexis, emarginatum, obtusum, rectum. Ale oblongae, vexillo brevioris. Carina longitudine alarum, emarginate. Stam: Filamenta didelphe (simplex et novemfidum), fere recta. Anthère subrotundae. Pist: Germen teretiusculum. Stylus sabulatus, ascendens. Stigma obtusu. Per: Legumen biloculare: loculus et alterum latus magis flexis. Sem: reniformia. Observatio: Tragacantha summa cum Astragalus habet affinitatem Astragalus Riv. Siliqua quad et oblonga polisperma Glaux riv. Siliculam gerit cordatam." In the characterization of genera Astragalus is not included the semi-bilocular legume, though it is a common character of more species, including the investigated taxa by us. Really, the A. exscapus was printed only in 1771 also by LINNÉ. According to CHATER (I.e.) Subgen Astragalus (Subgen Caprinus BUNGE) "This subgenus contains many species of narrow geographical range, differing from each other in a combination of minor, often overlapping characters. Most of them have here been aggregated into 3 groups." Consequently, he speaks about A. dasyanthus group and also A. exscapus group. But the original description or in many times the icones BUNGE (1869), PALLAS (1800) BÜRGE IV. BOISSER (1872) etc. had given the differences for the species. Moreover, here in Table 1 there are the similarities and dissimilarities qualitatively, referring to the represents of the two "groups". * For Studiums of the similarity, dissimilarity, distance and correlation between and among the samples, per see, the topic was discussed methodically in detail (e. g. by PODANI 1980).