1 62 Magnus . — On Aecidium graveolens (Shuttlew i). 
its growth on single nodes, by the withering of the branches, 
by the swelling of the nodes which bear the witches’ brooms, 
and by the absence of spermogonia. I have called this 
species Aecidium Jacobsthalii Henrici , P. Magn. It differs also 
from the Aecidium magellanicum , described by Berkeley on 
Berberis ilicifolia , Forst., which may be a third species attack- 
ing Berberis. The European Fungus forming the large witches’ 
broom on the Barberry, with a great many elongated erect 
branches, can therefore no longer be called Aecidium magel- 
lanicum. It may be designated either as Aecidium graveolens, 
Shuttlew., which name was found by Cooke in the Paris 
Herbarium, or as the aecidium of Puccinia Arrhenatheri 
(Kleb.), Eriks. 
I am deeply indebted to Mr. Harold Wager for having 
translated my German manuscript into English. 
EXPLANATION OF FIGURES IN PLATE XIV. 
Illustrating Prof. Magnus’ paper on Aecidium graveolens. 
The figures which accompany this paper were drawn from nature in my presence 
by Dr. Paul Roeseler. 
Fig. i. Longitudinal section of apex of spring shoot (in May, 1897) developed 
from a bud of witches’ broom. At M. M. the mycelium is seen growing in the 
pith up to the merismatic region of the apex, x 68. 
Figs. 2 and 3. Portions of Fig. 1 more enlarged. Fig. 2 from part marked A , 
and Fig. 3 from that marked B. Showing longitudinal tracts of intercellular 
mycelium with some haustoria : at A. a horizontal tract is given off. x 420. 
Fig. 4. Similar longitudinal section of pith at apex of spring shoot, with inter- 
cellular mycelium and haustoria. The parenchymatous cells near the mycelium 
are more elongated than the others, and less divided by horizontal walls. x 420. 
