Hi, I believe this asco is Aleuria aurantia but there are two characters which I have a little doubt. The size of the ascomata are pretty small (5-10mm) and more importantly, the  spores lack the reticulate surface, they are just smooth. These were found on clayey calcareous soil with burnt stems of Arundo and debris.

Micro characters:

Ascum
Ascospore release: Apical orifice without operculum
Shape: Cylindrical, slender, rounded obtuse apex, narrowing gradually towards the base which often exhibits an abrupt curviture at the base.
No. of Spores: 8
Operculum: Not observed
Tunic (Wall): Uni-tunicate
Ascum length (range): 142 - 205 µm
Ascum length (mean): 168 µm
Ascum width (range): 10 - 12 µm
Ascum width (mean): 11.1 µm
Ascum L:W ratio: 15.1
Iodine reaction (J +/J -): J -ve
Orifice: Observed, shallow.
Remarks

Spore
Spore length (range): 14.68 - 18.82 µm
Spore length (mean): 17.2 µm
Spore width (range): 7.0 - 9.3 µm
Spore width (mean): 8.5 µm
Spore Q factor (range): 1.79 - 2.19 µm
Spore Q factor (mean): 1.98
Spore shape : Fusoid-elliptical, widest at the centre with two identical rounded poles
Spore septa: Aseptate
Spore surface: Appears smooth
Oil bodies: Two, identical spherical oil bodies, located close to each other at the centre, sometimes seen with a tiny curved apiculum

Remarks: Spores arranged obliquely

Excipulum (medullary): Spherical to obtusely angular hyphae, 25-45 µm wide