CHROMOSOME-NUMBERS IN COMPOSITAE FROM PAKISTAN

Chromosome numbers of 82 taxa, belonging to 48 genera in ten tribes of the family Compositae, are reported from Pakistan. The chromosome num bers of 13 taxa are reported for the first time, including one new gen eric count (for Grantia) and a new base number (x = 10) in Sonchus. Th e new counts are as follows: n = 6 for Launaea tomentella; n = 7 for P ulicaria gnaphalodes; n = 8 for Cephalorrhynchus picridiformis; n = 9 for Artemisia salsolioides, Conyza stricta var. pinnatifida, Grantia a ucheri, Heteropappus altaicus var. canescens, Launaea oligocephala, an d Phagnalon pycnophyllon; n = 10 for Blumea bovei and Sonchus lacnocep halus; and n = 14 for Scorzonera koelpinioides and Scorzonera tortuosi ssima. The chromosomal counts for 31 other taxa are new for the flora of Pakistan.