320 
These, and to a certain extent the basal tissues are partially 
extruded pushing back in all directions the corky tissues of the 
lenticel. (Text Fig. 2, a, a,b, k.) The conidiophorous-stromata 
or pseudo-sclerotia are only found in relation to the lenticels and 
as far as could be determined every lenticel in the diseased 
region was occupied in this manner (PI. vii. Fig. 1, a), this prob- 
ably being the cause of the sodden, water-logged appearance of 
the affected tissues. Somewhat similar structures have been 
described on the vine by Istvanffi* and on lime trees by Smith.T 
In the former case the stromata were considerably more definite 
in structure, and were very small, being formed under the 
finally resolved into conidiophores. In neither case is any rela- 
tion to the lenticels mentioned, nor do the figures indicate that 
tral portion consists of a mass of elongate ramifying hyph 
: A nase’ 
which toward the periphery form a Sinks and ane Gece 
enclosed in a brownish-black skin one or two cells in thickness. 
This skin is absent from the sclerotial ring in contact with the 
bark (Text Fig. 2, s, p), and this is paralleled by tube culturvs © 
of Botrytis. Here the sclerotia are strongly concave and most 
usually adhere to the glass, the narrow, irregular, contact 
surface of the fungus body being free from the black skin enclos- 
ing all other surfaces of the sclerotium. The sclerotia are per- 
fectly discrete bodies with little mycelial attachment at any stage 
* Istvanffi, Gy. de: Etudes microbiologi i 
‘ », Y- de: ides mic ogiques et mycologiques sur le rot 
— de la vigne—Botrytis cinerea on Sclerotinia Fuckeliana, Annales de 
pepo Central Ampélologique Royal Hongroise, tome iii 5. 
_t Smith, R. E. Botrytis and Sclerotinia: thei ion in plant. 
di : aa tk bch cat d Scler ace relation to certain p 
pS See CSE ae ere eens yes 
(Ti plhe se Sa ses aeeae e 
