Chromosome numbers and pollen measurements are given for sixty-four collections representing eight species in the grass genus Aristida from central and southwestern United States. Meiotic chromosome counts of N=22, 33, and 44, in A. purpurea are reported for the first time. Counts of N=11 and 22 in A. fendleriana, A. glauca, and A. wrightii, are new for these species, as are counts of N=11 for A. longiseta and A. roemeriana. The relationship of pollen size and ploidy level is examined in five taxa, and the occurrence of intraspecific polyploidy in the genus is noted.
Proceedings of the Iowa Academy of Science
©1969 Iowa Academy of Science, Inc.
DeLisle, Donald G.
"Chromosome Number and Pollen Size in the Genus Aristida,"
Proceedings of the Iowa Academy of Science, 76(1), 74-81.
Available at: https://scholarworks.uni.edu/pias/vol76/iss1/11