Amazonia, Theissen, 1913

Mohamed, Hina & Thomas, Jacob, 2021, A new species of Amazonia (black mildews) on Ixora brachiata from Western Ghats, India, Phytotaxa 523 (3), pp. 259-263 : 260

Key to Amazonia species

found on Rubiaceae .

1. Appressoria uniseptate, basal cell very small.................................................................................................................................... 2

1. Appressoria uniseptate, basal cell not so............................................................................................................................................3

2. Ascospores 35–45 µm long .............................................................................................................................................. A. polypoda

2. Ascospores 25–30 µm long ......................................................................................................................................... A. asterinoides

3. Head cells entire only ........................................................................................................................................................................4

3. Head cells entire and lobed or entire and angular ..............................................................................................................................5

4. Ascospores 30–40 µm long ........................................................................................................................................ A. rubiacearum

4. Ascospores 45–55 µm long .................................................................................................................................................... A. goosi

5. Ascospores less than 38 µm long .................................................................................................................................. A. psychotriae

5. Ascospores more than 38 µm long .................................................................................................................................. A. brachiata