408 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
Fir-apple Potato, which it resemhles both in tubers and fohage. 
The tubers are often the shape of a spruce fir cone, the eyes 
being very numerous and deeply set. Much diseased in 1894. 
Illustration No. 17 is taken from the so-called Red Fir-apple 
No. 19. -Black Congo Potato. 
Fig. 47. 
Potato, SO named from a peculiar formation of the tubers. This 
has been grown at Reading for very many years, but has never 
shown any tendency to assume the form or characteristics of 
the ordinary Potato of commerce. 
No. 20. -Ai,.-\i()M> Potato. 
Fig. 48. 
No. 18 is a picture of the small White Fir-apple, which has 
also been grown, with the same results, at Reading, and difters 
from the Red Fir-apple chiefly in colour. 
The lUack ('ongo Potato is portrayed in Illustration No. li). 
This Potato, like the Fir-apple vai ieties, has the buds or eyes 
very strongly developed, and though the flavour is excellent when 
