Hello.
A tiny fungus shaped like globose black grains, only 0.05 to 0.15 mm in diameter, sprouting on the leaves of Salvia jordanii, colloquially known as rosemary, causing a marked yellowing.
Hyphae of the peridoid wall have an angular texture.
Conidia are cylindrical, with rounded ends, mostly with three septa, constricted within them, with brown intracellular pigment and abundant lipid droplets inside, measuring in water:
(14.7) 15.1 - 19 (20) × (6.9) 7.4 - 9.5 (9.7) µm
Q = (1.6) 1.8 - 2.4 (2.5) ; N = 30
Me = 17.4 × 8.3 µm; Qe = 2.1
I admit I'm not sure where the wind is blowing this time. The closest thing I know about rosemary leaves would be Alternaria alternata, but the microscopy doesn't match up at all.
Any feedback from you would be welcome.
Thank you very much in advance.
Best regards.