92 
size, pear-shaped, oblong, obovate, or clavate, tapering towards 
base or distinctly stalked (lop. long), a-septate to 6-septate, 
constricted at septa, longitudinal and oblique septa as well as 
transverse, pale or dark olivaceous up to 60 X 20jp.,and average 
breadth from 15-20^p. 
On leaves of Lemon. June. South Australia (Molineux). 
M. commune (Rabh.) and Jf. rosarium (Penz.) are both recorded 
on Lemon leaves, but this form differs from the former in the 
tufts and hyphoe not being brown but greenish, in the generally 
larger conidia, and in the absence of a minutely granular epispore. 
It differs from the latter also in the tufts and hypbm not being 
brown, in the joints of lxyphas not being inflated or pear shaped, 
in the much longer but more slender conidia, and in the absence of 
a granular to echinulate episporc. The conidia are not super¬ 
imposed as in Alternaria. (Figs. 68, 69.) 
36. DESTROYING MACROSPORIUM. 
(Macrosporium disr upturn, n. sp.) 
Hyphm tufted, ycllowish-groon to brownish, thick-walled, 
simple, sparingly septate, slightly sinuate, average 112 x dp. 
Cladospori/um-stage .—Conidia vellowish-green, apical, small and 
large. Small elliptical, 1-septate, average 10 X o^p.; largo oval 
to oblong, 1-3-septate, finely echinulate, 20-30 X 11-lop. 
Macrosporium^stage .—Conidia yellowish green, clavate, up to 
7-septate, muriformly divided and constricted at septa, shortly 
stalked, reaching 47 X lop. 
On green leaves of Orange. March, 1899. Burnley, near 
Melbourne. 
This form is associated with Pleospora disrupta (Me Alp.), and 
largely assists in destroying the tissue. (Figs. 70, 71, 72.) 
37. ROSY FUSARIUM. 
{Fusarium rose inn, Link.) 
Sporodochia minute, sessile, sub-globose or rather effused, aud 
then bursting through epidermis like a rust-pustule, gregarious, 
pale orange, or coral pink. 
Hyphre pinkish in the mass, fasciculate, soptate, diehotomously 
branched towards apex, 3-4 p. broad. 
Conidia produced at the tips of the branches, fusiform, straight 
or slightly curved, acute at both ends or blunt at attached end, 
typically 3-septate, may be 1-4-septate, with granular contents, 
average 34-45 X 31-4£p. 
On withered portion of Lemon-leaf. May, 1899. Burnley, 
near Melbourne. Closely associated with Diplodia destruens 
(MeAlp.), also Ilendersonia soda (MeAlp.). 
