הזיהויים של psathyrella

Severe infestation - one of the worst I have ever seen on this host species. Two planted tree's growing on margin of spring; these 5-6 tall. All young growth and especially floral primordia and maturing inflorescences covered in urediniospores.

Bees (Apis mellifera) noted harvesting spores - see https://inaturalist.nz/observations/68580488.

These tree's I have been watching monthly since September 2017. I last checked them on 1 January 2021 (not Austropuccinia was evident then). This infestation was reported to me by Wendy John who noted it on 23 January 2021 - see https://inaturalist.nz/observations/68482642