1) In 195d, four tetraploids of Sugi (Cryptomeria; japonica D. DoN) were discovered among l- and 2-year seedlings at forest nursery. 2) In comparison with the diploid, the tetraploids have the fdllowing charactristics : (a) The arrangement oi the tetrapioid stomata band tend to be disordered. (b) The tetraploid needles tend to be thick, twisted and bend at the topend. (c) The tetraplpid stomata size increases about. 30% and the teraploid stomata numbers decrease abaut 40% The tetraploid chromosome number seems to be doubled at the stage Of embryo development or, growing.
