CHROMOSOME COUNTS IN ARUNDINOIDEAE, CHLORIDOIDEAE, AND POOIDEAE (POACEAE) FROM PAKISTAN

A total of 85 chromosome counts representing 45 species belonging to 2 9 genera in three subfamilies of Poaceae, viz., Arundinoideae, Chlorid oideae, and Pooideae from Pakistan, are reported. The chromosome count s for six species, viz.: Leptothrium senegalense (n = 10); Piptatherum gracile (n = 12); Poa sinaica (n = 7); Sporobolus arabicus (n = 18); Sporobolus nervosus (n = 18); and Stipagrostis pulmosa (n = 22), are n ew determinations. Chromosome counts for an additional 34 species are new for the flora of Pakistan. New cytotypes were detected in Aeluropu s lagopoides (n = 20), Avena barbata (n = 21), Diplachne fusca (n = 20 ), and Ochthochloa compressa (n = 10).