8/28/1899 My dear Prof. Pammel, Your esteemed favor of Aug. 17th at hand and contents duly noted. You will find some very interesting Cer. Cusporas among these, you may find in some cases that you will have some difficulty in determining of finding them, as they do not make spots but are confluent over the surface some are situated on the upper side and others are the underside of the leaf. They seem to be in some cases facultative in others true parasites, and in still others true sap. the sap. spread over the surface, the spores are abnormally long and quite hyalin the one on Hibiscus esculentus is one example the more I study this one the more convinced I become that it does not differ much if any from that on gossypium. I regret in Iowa cases the material was very scarce and I could not send you more. I am sending you the

best I could to determine them correctly with the limited means I have at my command. My paper I think will be more useful as published in your Bien. Rept. than in the Acad. of Science Rept. as it will have a wider distribution. Thank you for Miss Cales kindly remembrance. I find this group of Cer. a very interesting one indeed. With best wishes to all. Geo. W. Carver