Boros István (szerk.): A Magyar Természettudományi Múzeum évkönyve 8. (Budapest 1957)

Baksay, L.: The chromosome numbers and cytotaxonomical relations of some European plant species

cies with chromosome numbers 32, 64 ; it will probably fall to separate species both oecologically and phytogeographically. 13. Arabis turrita L. 2n = 16 (2x). See above locality. 14. Camelina microcarpa Andrz. 2n = 40 (4x). Pisznice, Mts. Gerecse ; Bélkő, Mts. Bükk. In both localities, on limestone, from Festucetum sulcatae pannonicum association, together with Ferula Sadleriana, from a primary association. Its chromosome number agrees with the date of Man ton (1932). C. microcarpa is an Eurasian steppe-element, it is especially common in secundary places, in weed-associations on a dry soil. The primary species has differentiated due to cultural effects, so much that several authors separate it into 4 species (S t e b b i n s). 15. Camelina rumelica Velen, n = 6 (2 x). Isle Szentendre, Pócsmegyer, on the edges of locust groves on sand . Its chromosome number differs from the species examined up to now, which are all polyploids. 16. Helianthemum canum (L.) Baumg. 2n = 22 (2 x). Nagyszénás, Nagykovácsi, Festuceto-Brometum erecti association. 17. Telekia speciosa (Schreb.) Baumg. 2n = 20 (2 x). in the Feketesár valley, Mts. Bükk ; in a wet, watery high-weed association. Not varying ; a montane species ranging in the Carpathian Basin, the Balkans, and the Caucasus. 18. Solidago virga-aurea L. 2n = 18 (2 x). Szarvashegy, Budapest, from the fragment of a Fageto-Ornetum association. An exceedingly adaptable species, a member of the most different association from the mountains to the plains. 19. ! Echinops ruthenicus Fisch. 2n = 32 (4x). From the Botanical Gardens of Budapest. Its chromosome numbers agrees with that of E. sphaerocephalus. 20. ! Silene densiflora d'Urv. ssp. Sulingen Hendrych. 2n = 24 (2 x). In the Szádelő valley of the Slovakian Karst, in Seslerieto-Festucetum association. The primary species has a Balkanian and Near East range. 21. Allium moschatum L. 2n = 16 (2 x). Nagyszénás, Nagykovácsi, Festucetum glaucae hungaricum. A Pontic-Mediterranean species. Our date is conform to those of Billeri (1954). Pólya established a chromosome number 2n = 24, the oecological description of the collecting locality of his examined material is erroneous or based on some mix-up. 22. ! Carex Fritschii Waisb. 2n = 30 (2 x). Uzsa, Querceto-Betuletum callunetosum association (leg. Újhelyi). Its specific value was discussed for a long time, several authors regarded it as the subspecies of C. montana L. oX^ii» tief '«'A Its chromosome number differs, that of C. montana is 2n = 38. Aside of their different morphological characteristics, also their oecological claims are dissimilar. C. Fritschii is a species shunning limestone on the southern and eastern