Quoting de Bary: “It was not my purpose to present a monograph dealing with all the Brand fungi. For the present state of our science it seemed more important to me first of all to study the laws of development in a series of types; indeed this seemed to me a necessary preliminary condition for the investigation of the details. If and when I shall be able to settle many points about Brand and rust diseases by means of experiments with growing plants I cannot say. However, it seemed to me less expedient to wait patiently to see, than by offering a series of observations to give suggestions to those who may have the required terrain at their disposal.”

I. Specific Observations Concerning the Form and Development of the Brand Fungi

Ustilago
Protomyces
Cystopus
Coleosporium
Trichobasis
Uromyces
Puccinia
Epitea
Phragmidium
Aecidinei

II. Systematic Conclusions

Historical
General observations concerning the structure of fungi and lichens
Justification of a new division into lichens and fungi
Classification of the Brand fungi

III. Concerning the Relationship of the Brand Fungi to the Brand and Rust Diseases of Plants

The loose smut of the cereals
Polycystis occulta of rye
The rust
Brand fungi of conifers
Views about the relationship between fungus and disease; historical
Notion of disease and of parasites
The Brand fungi are actual fungi
Germination of their spores
Susceptibility of these spores to contagion
Penetration of these spores into plant parts
The Brand fungi are true parasites
Elimination of a number of apparent contradictions
The succession of many forms
Concerning the pathological changes produced by the parasite
Remedial measures for the treatment of smut and rust

Lithographic Plates

Explanation of plates