THE COTTAGE GARDENER AND COUNTRY GENTLEMAN’S COMPANION, July 28, 185?. 
267 
the under side of the threads, from two to four branches are 
given off in a radiating manner, like runners, which in turn 
develope new processes and a similar ramification; so that in 
this way the reticulate mode of branching and the quick 
development of the Mycelium are connected with that of the 
processes. A glance at Figs. 1, 3 proves that the mode of 
ramification is very different, observing a different law, and 
in no degree connected with the situation of the processes. 
That the extension of the fungus during summer (in¬ 
dependently of the immediate growth of the Mycelium) is 
ascribable to the dispersion and subsequent ready germina¬ 
tion of the oval utricles, seems beyond all doubt. On the 
contrary, I was unable to discover where they are deposited 
through the winter, in what condition they are, and how the 
first development of the plant takes place in spring. One 
would imagine a priori that they pass the winter on the 
bark of the last year’s shoots, or more especially on the 
buds, and so when they expand are ready to germinate 
on the young branches. I have, however, no express ob¬ 
servations on these points: only thus much is certain— 
that, as was before remarked, the disease commences on 
the inferior internodes. Whether the spores retain their 
form, or it is the already developed Mycelium which en¬ 
dures the severity of winter, is a point worthy of further 
investigation. In this respect the new fruit discovered by 
Amici is of the highest importance. He found, in October, 
1851, that individuals of the oval utricles of Oidium Tuckeri 
enlarge, assume a yellow tint, acquire a cellular structure, 
and contain hundreds of extremely small elliptic somewhat 
curved spores, furnished with a little nucleus at either ex¬ 
tremity. It is possible that these spores, developed late in 
the autumn, live through the winter, and in the following 
spring give rise to the new invasion of the fungus. The 
investigation of this matter is attended with no little diffi¬ 
culty on account of the extreme smallness of the spores. 
In September, 1851, I did not find this form of fruit in 
Switzerland, whether in consequence of the season not being 
sufficiently advanced, or that it is produced only in southern 
climes, points which must be decided by fresh observations. 
Cesati found similar fruit in Piedmont on Oidium Tuckeri, 
and I have just seen it in Dozen on an allied species, on 
the leaves of Hops, whereas Amici was led to its discovery 
in the Vine from the investigation of an Oidium on the 
common Gourd with the same kind of fruit. Should further 
investigation afford any key to this difficulty I shall not fail 
to return to the subject.—( Horticultural Society's Journal .) 
PINUS TUBERCULATA. 
Leaves in threes, thickly set on the branches, 
bright green, rather stiff, broad and flat, with an 
elevated rib running along their middle on the 
inner side, four inches and a half to five inches 
in length on the wild specimens. Sheaths short, 
smooth, not more than half an inch long on the 
young leaves, very much shorter on the older 
ones, and only partially persistent. Seed leaves 
on the young plants from seven to eight in 
number, rather slender, and not very long. 
Branches few, stout, and rather irregular, with a 
roughish bark. Buds below the middle size, 
imbricated, and not very resinous or pointed. 
Cones mostly in clusters of four, but sometimes 
solitary or in pairs, and only produced on the 
main stem, of a long conical shape, five inches 
in length and two inches broad, the outer surface 
curved, the inner straight, widest near the base, 
and gradually tapering to the point, quite sessile, 
and uneven-sided at the base, very hard, of a 
light brown colour or silvery grey when old, very 
glossy, and full of resinous matter; they stand 
off at nearly right angles when old, although 
rather pendulous when young, and remain on 
the trees for years without even opening or shed¬ 
ding their seeds. Scales largest and most de¬ 
veloped at the external base and down three parts 
of the outer side of the cone, deeply divided, 
much elevated, horizontal, and rather conical, 
particularly those near the base, the longest of 
which is three-eighths of an inch, terminated by 
a strong, sharp prickle; but, as they approach 
towards the point of the cone, they become much 
less elevated, more quadrangular, and blunter 
pointed; the scales on the inner side of the cone 
and round the point are very much smaller and 
quite flat, with a small dark brown prickle in 
their centre. Each cone contains fifteen or six¬ 
teen rows of scales, within each of which are two 
very small seeds, with wings three quarters of 
an inch in length. 
This Pine was first discovered by Dr. Coulter 
to the south of Monterey, in lat. 36°, near the 
level of the sea, and growing almost close to the 
beach, intermixed with Pinus radiata. Mr. Hart- 
weg found it growing on the Santa Cruz moun¬ 
tains, sixty miles to the north of Monterey by 
land. It is a tree of slow growth, and seldom 
attains more than twenty-five or thirty feet in 
height, with a trunk eight or ten inches in 
diameter. As hardy as Pinus insignis. —( Horti¬ 
cultural Society's Journal.) 
