L. Hably szerk.: Studia Botanica Hungarica 19. 1986 (Budapest, 1986)
Németh, Ferenc; Iványi, E.: Morphometrical studies on the Hungarian representatives of Ophrys scolopax Cav. agg. (Orchidaceae)
S = the coefficient of similarity between the j and k individuals; it ranges from 0 (maximal difference in all characters) to 1 (no difference in any character) V = number of the examined character's w , and s , = partial coefficients of similarity for the i-th single character. Thev are calculated i]k ljk as follows: for binary nominal characters: w.., = 1 and s.., = 0 ljk ijk w , = 1 and s ,= 1 ijk ijk w... = 0 and s , = 0 ijk ijk in case of difference; in case of common presence of the character in case of common absence of the character for quantitative characters: w. ., = 1 and ljk s... = 1- U..-X I / , ilk 1 li ik' t R. where ik value of the i-th character of the 1-th individual value of the _i_-th character of the _k^-th individual range of the i-th character in the whole sample The matrix obtained by this way was analyzed by the weighted pair group method (PODAN1 1980). The similarity between the h, i and j clusters is given by the formula S, . 4 S h 3 H hi, j 2 where s markings are similarity values specified by their indices. For a more convenient evaluation we made some simplifications in the dendrogram (Fig. 5), i.e. the groups of the same localities have been merged into one unit. The value of linkage of these united groups is the lowest value of the original cluster. RESULTS According to the publications cited in the introduction, the differential marks of the species and subspecies of the subseries Oestr i ferae (SOO 1970), i.e. length and width of the labelium, length of the horn, width of the hairless edge of the labelium are defined with an unsatisfactory accuracy: the measuring points on the labelium or the intervals of the horn length are not determined, etc. Some single specimens of all the four subspecies of the group were found, e.g. ssp. oestrifera (wider than long labelium), ssp. heldreichii (longer th»n 13 mm labelium), ssp. scolo pax (short and obtuse horn), ssp. cornuta (long and acute horn). It is clear that the differential characters can be explained only by a statistical approach, and they can be used in this sense for taxonomical classification. For these reasons we declined to give a taxonomical revision, although it is visible that the Pécs population is more closely related to the ssp. cornuta than the Kunpeszér one which corresponds to the ssp. scolop ax or rather to the trans, balcanica ( scolopax-cornu- ta, SOÓ 1936). On the basis of the univariate analyses, remarkable differences were found between the two populations (tables 4 and 5), namely at 0.1 % significance level in the following characters: number of flowers, length of the horn, the colour factors of sepals and petals and length and width of the sepals. From these the number of flowers, the length of horn and the colour factors of the sepals
