Nov. 1906.] | NOTE ON JUNCUS EFFUSUS SPIRALIS. 233 
Nore oN New DISEASE ON ABIES PECTINATA. 
By Dr. A. W. Borruwick. 
This disease occurs on the leaves, and is caused by an 
ascomycete. The affected leaves are scattered over the 
twigs of the current year. They become first light brown in 
eolour, and finally very dark brown. The perithecia arise 
below the epidermis, which they ultimately rupture to allow 
the spores to escape. At maturity these fructifications may 
be seen as small, black, spherical swellings on the infected 
leaves. Considerable damage may be done to the trees thus 
attacked. 
Both the above, as yet unnamed, are under further 
investigation. 
Nore ON JUNCUS EFFUSUS, VAR. SPIRALIS.1 By Mr. Macnus 
SPENCE. Communicated by Prof. I. BayLey Batrour. 
This plant is pretty common in Orkney. I have seen it in 
several localities. It is to be found in Birsay—the most 
westerly parish of the Mainland of Orkney; in Deerness, 
the most easterly, and in most of the intervening parishes. 
It grows most abundantly in boggy moors. The specimens 
exhibited were taken from a bog to the south-east of the 
public school of St. Andrews, a parish in the East Mainland. 
In this bog J. effusus var. spiralis is more numerous than 
J. effusus, and bears the proportion of 3 to 2. When, how- 
ever, one reaches the higher and drier ground the proportion 
is reversed, and farther still it becomes rare. One can ata 
glance notice the great difference in the appearance of the 
tussocks. Most of the individual plants of the tussock 
spread out at an angle of from 30° to 40° to the ground. 
The more upright forms of effusus and conglomeratus are 
easily distinguished from the graceful stems of -/. ¢. spiralis. 
The tussocks of the two plants grow apart and do not 
intermingle. 
1 This is probably the first record of its occurrence in a wild form in 
Scotland. See Jas. M‘Nab in “Trans. Bot. Soc. Edin.,” xi., 1873, 
pp. 502-504. 
