90 
Conidia yellowish-brown, fnsoid, grub-like, hardly constricted, 
8-septate, 4.5 x tip. 
On languid Lemon leaves. August, 1899. Burnley, near Mel¬ 
bourne. 
The leaves were badly affected with Pleospora limonum (Penz.), 
and this was probably a stage in the development of that fungus. 
(Figs. 123, 124.) 
32. VARIABLE HETEROSPORIUM. 
(Ifeterosporium variable , Cooke.) 
Tufts minute, distinct, compact. 
Hyphce fasciculate, bright olive-green, radiating, rigid, simple, 
septate, only slightly constricted at septa, average 84 X 5p., 
originating from slender green filaments inside leaf, only 2p. 
broad. 
Conidia paler in colour, produced at apex, finely echinulate, 
cylindrical, 1-4 septate, not constricted at septa, 20-30 x 5^-7 %p. 
On leaf of Knight’s Citron. April, 1899. Bnrnley, near Mel¬ 
bourne. 
The hyphen are bright olivaceous and the conidia are distinctly 
echinulate. 
It agrees generally with Cooke’s species, but the byphac are of 
a strikingly bright olive, and not dusky olive, and the conidia are 
rather narrower. (Figs. 60, 61.) 
33. TRI-SEPTATE SPORODESMIUM. 
(<Sjiorodesmixnn triseptatum, n. sp.) 
Mycelium forming a pavement of cells, more or less continuous, 
over surface of scab. 
Hyphte colourless to pale greenish or yellowish-green, septate, 
close-jointed, moniliform, or segments polygonal or elongated, 
creeping, with short projecting hpylne here and there. 
Conidia various:— 
(а) Colourless to very pale-green, in chains, continuous, 
somewhat fusiform or elongated oval, 9-11 x 3-4/x. 
(Ovularia-form.) 
(б) Pale vellowish-green to brown, in chains (at least of two), 
thick-walled, 1-2-septate, constricted at septa, smooth, 
9-Id x 5-7 p. (Cladosporium form). 
(c) Pale-brown, oblong, 3-septate, constricted at septa, with 
one or two longitudinal septa, smooth, 23-26 X 13-15/z. 
On Lemon-leaf. April, 1898. Cooroy, Queensland (Tryon). 
