40 W. G. Farlow—Disease of Olive and Orange Trees. 
publication of Tulasne’s “ Carpologia Fungorum,” are known . 
to be different states of development of species of Pyrenomy- “ 
cetes. a 
Pycnidia.—Besides the forms already described, there are % 
other bodies of a more complicated nature. Plate 3, Fig. 8, 4,4, — 
represents the pycnidia, which are quite numerous in the spots, — 
both on the leaves and the stems. Their general shape is sphe- — 
roidal. They consist of a membranous sac of the same color as _ 
the darker parts of the mycelium, in which are contained the 
small bodies, which are represented as being discharged in Fig. is 
3,5. Their average diameter is 04 mm. In general appear- 
ance, the pycnidia resemble so closely those with which every 
one is familiar in other Pyrenomycetes, that any further deserip- A 
tion is unnecessary. 2 
Stylospores.—In examining the larger black spots on the — 
stems of the olive, other bodies are seen,—the stylospores, to adopt 
Tulasne’s nomenclature. They are represented in Fig. 1, a, and 
we pends by being less inclined to a spherical shape. The 
eig 
4 
: e 
mm. ‘I'he wall of the flasks is composed of dark-colored cells, 
; an 
the base generally sends up branches around the flask, it is only 
by a careful dissection that the base can be clearly seen. At 
first, the mouth is closed, and there is a depression of the cells 
at the center ; but, later, they spring back so as to form, round 
the open mouth, a circle of shghtly reflexed teeth, whose tips are 
perfectly hyaline. The neck of the flask is hollow: but, in the 
swollen portion, spores are borne. They are oval, and divided 
