Echinulation occurred at times in all of the species studied. In some cases part of the spores from a colony were echinulate while others were smooth. American Journal of Botany - Page 461 1917 Full view - About this book
...relatively short time—two to six weeks—in some species there is a marked secondary development. is variation in shape within a single species, but...species. Generally spores darken with age. Alternaria dianlhi and A. brassicae var. microspora grown at IO° showed marked color change, both being very...
Echinulation occurred at times in all of the species studied. In some cases part of the spores from a colony were echinulate while others were smooth. 