| When screening germ plasm for Karnal bunt resistance, allantoid secondary sporidia produced in solid media should be used as inoculum. |
| The dissemination of the sporidia may, from identity of structure in the perithecium, be deemed to follow a like method in all. |
| The sporidia in many cases are large, reticulated, echinulate or verrucose, and mostly somewhat globose. |
| The sporidia are strongly constricted in the centre, at first uniseptate, with two nuclei in each division. |
| In these genera the sporidia, on maturity, may be observed blackening the matrix round the mouths of the perithecia. |
| Sporidia of same inclosed in ascus with accompanying paraphyses. |
