439 
1 per cent. of phosphate of ammonia are respectively capable of 
arresting the growth of the mycelium of the fungus, hence the 
choice of the particular fungicide resolves itself into questions as 
to the relative cost of each of the three substances, and also as to 
which of the three would be most suitable in addition as a fertiliser 
for a cereal crop. Superphosphate of lime has been definitely 
proved at Kew to arrest the growth of the fungus and this material 
can therefore be recommended, the quantity required being 14 cwt. 
per acre. It is important that the dressing should be applied at a 
time when its activity as a fungicide should be present when the 
crop is young, as it is during this period that it is most liable to 
infection. Sulphate of iron has proved effective in Australia, in 
checking the ravages of “ Take-all,” 1 cwt. per acre being applied. 
e earlier varieties of wheat are said to be most susceptible 
of the grain. In both instances, the absence of blackness at the 
base of the stem, will clearly indicate that Ophiobolus is not the 
cause of injury. 
$ no proper description of Ophiobolus appears in any British 
mycological work, the following diagnosis should enable the fungus 
to be recognised :— . , 
Ophiobolus graminis, Sacc. Perithecia scattered, blackish, large, 
subglobose, with a straight or more or less curved neck, 400-500 pu 
in diameter. Asci narrowly cylindric-clavate, 8-spored, 90-125 x 
12-13 py. Spores rod-shaped, almost colourless, 70-100 x 3 yn, 
3—5-7-septate. 
LVIiI.—_MISCELLANEOUS NOTES. 
Str Jospeh Hooxer.—Since the publication in A.B. 1912, 
pp. 18-34, of the List of Works by the late Sir Joseph Hooker, the 
following additions have been noted :— 
1849, 
Letter to A. von Humboldt, July 25, 1849. (Hook. Kew 
Journ. Bot. 1849, vol. i. pp. 337-344.) 
1853. 
Note on the Fossil Plants from the Shetlands. (Journ. Geol. Soc. 
1853, vol. ix. pp. 49-50.) 
1858, 
Robert Brown ; an obituary notice. (Gard, Chron. 1858, pp. 493-4, 
701, 732-3.) [Vide Proc. Linn. Soc. 1887-8, p. 54, footnote. ] 
