| When several forms are obtainable from a single aecium it is most probably that hybridization will sometimes occur and possibly evolve new forms, or yield forms already known. |
| The presence of two or more forms in the strains from single aecial cups indicates that the aecia are not the product of the fusion of the hyphae of a single form at the base of the aecium. |
| If sporophytic mycelium is present when an aecium starts, the sporophytic and gametophytic components are intimately mixed in the aecium from its very inception. |
| The initiation of an aecium begins relatively deep within the phelloderm surrounded by living host cells. |
| If two or more physiologic forms make up or form a single aecium, then, there is no limit to the number of physiologic forms of stem rust that may be identified in the progeny of a single aecium. |
