70 FUNGOID PESTS OF CULTIVATED PLANTS. 



vascular bundles with a yellow slime. This mucus is said to contain 

 immense quantities of a bacterium, to which at first the name of 

 Bacterium Hyacinthi was applied. 



Whilst these little bodies are embedded in the slime they remain 

 motionless, but when removed from it they soon exhibit a lively motion, 

 and begin to divide. In the spring they appear in the vascular bundles 

 of the leaves. 



Gard. Chron. May 12, 1894, p. 592 ; Journ. E.H.S. xxvi. 1901, 

 p. 222 ; Hart. & Som'. Dis. Tr. p. 37. 



Another disease attacks principally the flowering parts and is attended 

 by the production of a foul- smelling mucus. Upon making a close 

 examination Dr. Heine discovered that the mucus and the tissues were 

 full of bacteria, quite different from those of the "yellow disease," and 

 was called Bacillus Hyacinthi septicus. It is reported that when healthy 

 plants are inoculated with this the evidence of infection is manifested 

 within twenty-four hours. When cultivated on Potato it formed a yellow 

 slimy layer, and in a few days gave off a strong offensive smell. 



Gard. Chron. May 12, 1894, p. 592. 



Tubeuf contends that a common large Peziza, which grows on manure 

 heaps (Peziza vesiculosa), attacks Hyacinths and other plants in gardens 

 and kills them. 



Mass. PL Dis. 162. 



CON VALL ARIA BROWN SPOT. 



Septoria brunneola (Fries), PL V. fig. 87. 



This leaf-spot is found, not uncommonly, on living or fading leaves of 

 Lily of the Valley, but not often in fruit, so that the spots remain sterile 

 and harmless. It is believed, however, to be only a prelude or early stage 

 of a more highly developed fungus (Sphcerella brunneola). 



Brown irregular spots on the leaves, which at length acquire a blackish 

 colour, precede the receptacles of the Septoria, which latter subsequently 

 appear as little dots clustered upon the spots. The sporules are long and 

 threadlike, without division (75-100x2 /*). 



This parasite is known also in Sweden, Italy, and Moravia. 



Sacc. Syll. 3113 ; Journ. E.H.S. xxvi. 1901, p. cxl. 



CONVALLARIA RED SPOT. 



Phyllosticta cruenta (Fries). 



Another leaf-spot has been found in Britain on leaves of Solomon's 

 Seal, forming oblong blood-red spots with a pallid centre, upon which 

 the receptacles are scattered. The sporules are somewhat sausage-shaped, 

 rounded at the ends, and curved (14-16 x 5^-6^ p). 



This spot has also been found in France, Belgium, Germany, Italy, 

 Portugal, Siberia, and North America. 



Sacc. Syll. iii. 324 ; Grevillea, xiv. p. 74, No. 437. 



