74 FUNGOID PESTS OF CULTIVATED PLANTS. 



No -T.'cidiinu or Uredo has been found associated with this disease. 



The teleutospores are somewhat elliptical, from golden-yellow to chest- 

 nut-brown (38-60 x 24-27 /*), obscurely reticulated, either rounded at both 

 ends or with the base somewhat attenuated into the very short, thick, 

 deciduous peduncle, with a central partition dividing the teleutospore into 

 two nearly equal cells. 



Nuovo Gioni. Bot. Ital. vii. 255 ; Sacc. Syll. vii. 2579. 



The attack of Fusarium bulbigewum on Narcissus bulbs (Grevillea, 

 xvi. 49) has not been repeated. 



A form of leaf-spot (Septoria Narcissi), with the receptacles scattered 

 over the tips of fading leaves, has not yet been observed out of Italy. 



Iris Rust. 

 Urcdo Iridis (Thiim.). 



This rust is believed to be common in gardens on the leaves of various 

 species of Iris and to be quite distinct from another Uredo which furnishes 

 the uredospores of Puccinia Iridis (DC). This Uredo is supposed to have 

 neither JEcidium nor Puccinia associated with it. 



The pustules are linear-ovate, and sometimes confluent, on both sur- 

 faces of the leaves, covered at first by ihe cuticle and then exposed by 

 rupture, of a chestnut-brown colour. The uredospores are almost globose, 

 rarely somewhat pear-shaped, externally rough, brown (30-35 x 20-25//). 



Dr. M. Foster says "it does not readily attack the broad-leaved 

 Mediterranean forms, but I am inclined to think that almost every species 



would take it." 



Syll. xi. 1299 ; Ploicr. Brit. Ured. 257. 



There is supposed to be another species in North America (Uredo 

 iridicola) on the leaves of Iris versicolor, with rough globose uredospores 

 25 /< diam.), of which we know nothing, and it may be the Urcdo Iri<lis 

 of Bchweinitz. 



I IMS Bkand. 



Puccinia Iridis (DC), PI. V. fig. 91. 



It is difficult in follow the mutation of names, but this we believe to 

 be the same fungus which Berkeley called Puccinia truncata. It is found 

 on the Leave of many species of Iris, besides /. fatidis&ima and 

 /. germani a. 



Tin uredo pores are Found in crowded pustules, at first covered, then 

 exposed, of a rusty-brown colour, crowded together, and either sub- 

 glol I, <a- ovoid (20 :■■> - 1(5 2(5 p), externally rough, and 



ochi 



Tin- beleuto pon occur in linear, elongated, striaaform pustules, which 

 art blackish to the eye ; the spores are two-celled, club-shaped, with the 



apex rounded, or rather obtuse, or acuminate, with the spore-coat thickened 

 at tin apex, constricted in the middle at the septum (80-55 x 14-22 /j), 

 smooth, pale brown, with a hyaline pedicel (12 x 5 /<). 



