What is the thin-walled summer spore which is produced during the so- called Uredo stage of certain rusts. See (in the Supplement) Uredinales, Heteroecious, etc called?

uredospore — The thin-walled summer spore which is produced during the so- called Uredo stage of certain rusts. See (in the Supplement) Uredinales, Heteroecious, etc. (Webster's 1913.)

Sources