n8 
A NOTE ON INDIAN WHEAT-RUSTS. 
This remarkable difference may possibly be held to account also for 
the absence, in the case of the Shibpur Rust, of teleutospores 
from the wheat. As if this were not sufficient distinction, it is seen 
that, though the uredospores of the two are very similar, their teleu- 
tospores are quite different. 
But even if the absence of teleutospores from the wheat be 
held not absolutely proven, and if the connection between the “Shib- 
pur rust ” and the Puccinia on Launea asplenifolia be deemed yet a 
matter of doubt, we still have, as we believe, proof that the “ Shibpu^ 
Rust is not P» rubigo^vera^ in the fact that the uredospores of the 
two rusts occur in pustules that differ markedly in form and in dis« 
position. 
The uredosporic pustules of P, rubigo-vera are described by 
Winter [Rabenhorstf Kryptog^ Flora \i pt. i, p. 218) as elliptic to 
shortly-linear, whereas those of the “ Shibpur Rust are round. The 
pustules of P* rubigo-vera affect especially the leaf-sheaths and culms, 
the leaves, according to von Tubeuf {Pflanzenkrankheiten, 360), 
being much less affected, while they are figured by Oersted (System 
der Pilse^ Deutsche Ausgabe, 24) as occurring on the glumes. In 
the Shibpur rust the disposition of the uredosporic pustules is quite 
the reverse of that indicated by Oersted and by von Tubeuf for 
P» rubigo-vera* 
Another point to which we would direct attention is the fact that 
against this Shibpur Rust’* barley is immune; whereas, according 
to Plowright (Brit, Uredineoe and Ustilaginese^ rfiS), barley is 
one of the species affected by P, rubigo^vera. It must, however, 
be recollected that Winter (loc, cit. 218) only postulates the form 
described as P, rubigo-vera var. simplex Koernicke, as occurring on 
barley ; in this he is followed by von Tubeuf ( loc, cit» 360), and it is 
probable that this is Plowright’s meaning also though he does not 
definitely express it; it will be necessary to allude to this point 
further on. In the meantime the life-history of this rust having been 
incompletely worked out, we refrain from proposing a new name 
to distinguish it. 
We may next consider the rust that was first met with at 
Mozufferpur, but that was encountered in several other localities in 
Upper India and was found on the completion of the tour of inspec- 
tion to be raging at Shibpur in March with all the violence displayed 
by the other rust in January and February. 
That this, which for convenience we have termed the** Mozufferpur 
Rust, ” is the blight tentatively referred by Dr. Barclay to P.gramims, 
is undoubted. The true P. graminis is a species whose aeoidial 
