A NEW CERCOSPORA ON IIUMULUS 
135 
sparsis hynlinis vel dilute brunneis plerumque simplicibus rare bifur- 
catis continuis, basi bulbosis sursum attenuatis apice truncatis 50- 
70/u-longis; conidiis magnis cylindricis utrinque attenuatis obtusis 
dilute brunneis rectis vel plus minusve curvatis, demum 5-14-septatis, 
114-380 p X 12-19 fj, plerumque circiter 200 p x 14 p. 
In foliis Humuli Lupuli Linn. (cult.). 
Cantuaria, Anglia (E. S. Salmon et H. Wormald). 
A C. Humuli S. Hori maculis orbicularibus hyphis fertilibus non 
fasciculatis conidiis multo majoribus statim dignoscitur. 
Ceecospora HuMUf.i S. Hori. 
Maculis delinitis sparsis angularibus 1*5—2 mill, latis ssepe coa- 
lescentibus avellaneis by plus fertilibus amphigenis in ea^spites dense 
congestis e basi subspluerica orientibus divergentibus curvatis vel 
Hexuosis nodulosis 1-2-septatis rare ramosis apice obtusis basi parum 
bulbosis dilute brunneis 20-40 jux4/x, conidiis filiformi-obclavatis 
dilute brunneis 4-9-septatis curvatis granulatis apice obtusis basi 
truncatis 50-90 /x X 4 fx. 
In foliis vivis Humuli japonici Sieb. et Zucc. (indigenae) nec non 
H. Lupuli Linn, (cult.), Tokyo. 
The description which Prof. S. Hori sent is as follows :— 
“ Cercospora Humuli Hori MS. 
“ Spots distinct angular l|-2 mm.; scattered, often coalescing into 
a large irregular spot, drab coloured. Sori amphigenous. Conidio- 
phores numerous, fascicled in a hemispherical form, arising from a 
small cellular base, free ends scattered, curved or Hexuous, 1-2- 
nodulose, 1-2-septate, rarely branched, apex rounded with a scar, 
base slightly bullate, light brown, 20-40/x long, 4 p broad. Conidia 
filiform-obclavate, light brown, 4-9-septate, curved, apex obtusely 
pointed, base truncated, 56-90 p long, 4 p broad, contents finely 
granular.—On living leaves of the wild Humulus japonicus Sieb. et 
Zucc. and cultivated II. LupulusL. in Tokyo and its vicinity. Very 
common, August to November.” 
Up to the present C. cantuariensis has been met with only in one 
locality, viz. a hop-garden at Canterbury. It was found on the 
living leaves, forming spots characterized by a greyish (almost white), 
central portion (1—5 mm. diam.) bordered by a dark, purplish-brown 
line, outside which was a yellowish zone extending for from one to 
several mm. and merging into the general green of the leaf. Where 
the spots were close together the yellow zones coalesced to form large 
yellow areas. These colour characters were more conspicuous on the 
upper surface of the spots than on the lower. The conidia were 
found to be produced on the grey central portion of the spots, chiefly 
on the lower surface, but also occasionally on the upper. The 
conidiophores are 50-70 p long, simple or occasionally furcate, non- 
septate and swollen at the base, hyaline or pale brown. The conidia 
are pale brown in colour, cylindrical, and tapering towards the ends, 
which are rounded. They are characterized by their large size, being 
usually 200 p or more in length by about 14 p ; they are very variable 
however in this respect, the limits observed being .114-380 x 12-19/a. 
The septa, too. are very variable in number, 5 to 14 being observed. 
An examination of the material sent bv Professor Hori showed 
that not only was there considerable difference in the morphology of 
