Capillipedium, Botriochloa

Denchev, Teodor T., Sun, Hang, Denchev, Cvetomir M. & Boufford, David E., 2016, A new smut fungus on a new grass: Sporisorium capillipedii-alpini (Ustilaginales) sp. nov. infecting Capillipedium alpinum (Poaceae) sp. nov., from Sichuan, China, Phytotaxa 252 (3), pp. 217-227 : 226

Key to the smut fungi on Capillipedium, Botriochloa , and Dichanthium with sori destroying all spikelets of the inflorescence of an infected plant

1 Spores up to 9 μm long ..................................................................................................................................................................... 2

1* Spores larger, more than 9 μm long .................................................................................................................................................. 3

2 Spores smooth, paler on one half ...................................................................................................................................... S. taianum

2* Spores minutely echinulate, not paler on one half .................................................................................................. S. dichanthiicola

3 Spores moderately echinulate (spines up to 0.6 μm high), with spore walls 0.7–1.4(–1.7) μm thick .............................. S. sahayae

3* Spores with lower ornamentation (less than 0.3 μm high) and thinner walls (up to 1.0 μm thick) ................................................. 4

4 Spores smooth in LM; densely punctate in SEM, with projections up to 0.1 μm high ................................................. S. mysorense

4* Spores minutely verruculose in LM; minutely echinulate in SEM, spinules more than 0.1 μm high, spore surface punctate between the spinules.........................................................................................................................................................................................5

5 Spores (10.5–)11.5–14.5(–15.5) μm long; sterile cells 6–14.5 μm long, with walls 0.5–0.8 μm thick ............ S. capillipedii-alpini

5* Spores (8.5–)9–12(–13) μm long; sterile cells 9–22 μm long, with walls 0.8–2.0(–2.5) μm thick .......... S. andropogonis-annulati