Hello.
Very small, globose, mucronate perithecia, blackish in color and very uniform in size, between 0.25 and 0.30 mm in diameter, sprouting sporadically from a dry herbaceous stem still attached to the plant.
Hyphae of the perithecium wall, globose angular in texture, with an intracellular brown pigment.
Hyphae of the excipulum globose and hyaline, from which arise paraphyses with swellings and short septa.
Asci apparently eight-spored, with no reaction to Melzer's reagent in their apical apparatus. Fusiform, hyaline ascospores with 2 to 4 septa, no reaction with Melzer's reagent, and with the following measurements of free spores:
(28.9) 30.4 - 42.4 (43) × (3.9) 4.5 - 6.3 (6.7) µm
Q = (5.3) 6 - 7.4 (8.5) ; N = 12
Me = 35.8 × 5.4 µm ; Qe = 6.7
Based on the microscopic data obtained, the closest match I know would be Ophiobolus sp., but I admit I'm not entirely sure.
Any suggestions would be greatly appreciated.
Thank you in advance.
Best regards.