It will be seen that, while in the observations made on _S. rostratum_ the flowers which failed to produce seed did not reach much over six per cent., in _C. chamæcrista_ it is over sixty per cent. In addition to this fact, it is rare to see a seed pod of _S. rostratum_ which has been destroyed by insects or other destructive agencies, while in 460 pods of _C. chamæcrista_ which were examined at Lake View, September 4, not one was found which did not have some of the ovules destroyed by the larvæ of some insect, and probably this would amount on the average to fifty per cent. of all the seeds produced, being in the case of some plants as high as seventy-five per cent. A convenient method of approaching the question of the production of seeds might be to determine the number of seed pods produced on a given area of ground. A general idea may be obtained from the examination of the plants growing upon two square feet of ground. In the first case, the plants were much crowded; in the second, not nearly so much so; in fact, it may be said they were growing under “normal” conditions. It might be interesting to compare the results. The material for the two tables was taken September 4. FIRST SQUARE FOOT. Plant 1, pods 0 " 2, " 10 " 3, " 4 " 4, " 13 " 5, " 0 " 6, " 12 " 7, " 3 " 8, " 1 " 9, " 4 " 10, " 3 " 11, " 0 " 12, " 25 " 13, " 2 " 14, " 0 " 15, " 0 " 16, " 10 " 17, " 2 " 18, " 0 " 19, " 0 " 20, " 0 " 21, " 0 " 22, " 6 " 23, " 1 " 24, " 5 " 25, " 2 " 26, " 3 " 27, " 0 " 28, " 3 —— ——— Total, 28, pods 109 SECOND SQUARE FOOT. Plant 1, pods 1 " 2, " 50 " 3, " 36 " 4, " 15 " 5, " 48 " 6, " 34 " 7, " 9 " 8, " 11 " 9, " 9 " 10, " 3 " 11, " 0 " 12, " 7 —— ——— Total, 12, pods 223 In the first square foot of ground, where the plants were much crowded, of the twenty-eight plants, ten produced no seed pods at all, and of the remaining eighteen only six produced over five each. On these plants an average of a little less than four pods per plant was produced. In the second lot, where, evidently, the plants were not nearly so crowded, only four produced fewer than five seed pods, and there was a general average of 18.7 pods per plant.