Descriptive Characters

Stems and leaves covered with the fungus were fixed in the Held with weak chrom-acetic fixative (Johansen, 1940). From this material serial sections were prepared, using alcohol for dehydration, and embedded in paraffin wax under reduced pressure. Several stains were tried, Pianese IIIB (Peacock, 1945) proving the most effective.

Examination of the sections showed that neither on the stem nor on the leaves did the hyphae produce haustorial organs of any sort, nor was the living tissue of L. scoparium penetrated in any way.