CEYLON FUNGI. 
167 
the centre ; border reflexed, lobed. Cells not crenate at the 
edge, as in the last Æcidium rhytismoideum). Spores 
somewhat angular. A far more minute species than the last. 
The spot is merely discoloured and not incrassated as in that 
species.” It is to be noted that Berkeley did not state that 
it was on Pavetta indica. 
Two species of Æcidium, Æcidium flavidum B. & Br. and 
Æcidium Pavettæ Berk., were listed in the Fungi of Ceylon. 
Æcidium flctvidum was described as ‘‘ Maculis effusis flavidis 
hypophyllis ; soris sparsis ; pseudoperidiis margine crenatis 
laceris. On leaves of Pavetta indica. Peradeniya, February, 
1868 .” . 
It will be seen that there is very little difference between 
the two descriptions. Æcidium Pavettæ is said to produce a 
black spot, but not a thickened black spot as in Æcidium 
rhytismoideum, while Æcidium flavidum produces a yellow 
spot. This difference may be merely a matter of age ; 
Æcidium argyreiæ produces a yellow spot which becomes thin 
and black later. In the absence of type specimens there is 
nothing to contradict the supposition that Æcidium flavidum 
is identical with Æcidium Pavettæ, as indicated by Sydow and 
Butler (Fungi Indiæ Orientalis, IV.). 
In the Uredineæ and Ustilagineæ of Ceylon an Æcidium 
on Pavetta hispidula W. & A. was listed under the name of 
Æcidium flavidum ; it occurred on the leaves, on pale yeUow- 
green spots, which were slightly bullate. Since that publica» 
tion an Æcidium identical in microscopic character has been 
found on several occasions on Pavetta indica L. at Hakgala. 
It occurs on the young stems and petioles, which are in conse- 
quence distorted and thickened ; the stems are greatly swollen, 
and the leaves are reduced in area. The affected shoots form 
Witches’ brooms. 
The species which causes these distortions on Pavetta indica 
does not appear to differ from that which occurred on 
undistorted leaves of Pavetta hispidula. The case may be 
parallel to that of Tabernæmoniana dichotoma attacked by 
Æcidium ceraceum, which causes swelhngs and distortions on 
the stems, but may not produce any such effect when on the 
leaves. 
