Sporisorium andropogonis-annulati (Bref.) S.R. Wang & M. Piepenbr., Mycol. Progress

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 : 222-224

Sporisorium andropogonis-annulati (Bref.) S.R. Wang & M. Piepenbr., Mycol. Progress 1: 403, 2002. ( Figs 12–15 )

Ustilago andropogonis-annulati Bref., Unters. Gesammtgeb. Mykol. 12: 109, 1895.— Sphacelotheca andropogonis-annulati (Bref.) Zundel, Mycologia 22: 132, 1930.— Type: On Dichanthium annulatum (as Andropogon annulatus Forssk. , Poaceae ). INDIA. Uttar Pradesh: Dehra Dun, comm. D.D. Cunningham (type specimen lost in Berlin (B), during World War II).

Schroeteria annulata Ellis & Everh., J. Mykol. 6: 118, 1890.— Sphacelotheca annulata (Ellis & Everh.) Mundk., Trans. Brit. Mycol. Soc. 23: 92, 1939.—Type: On Dichanthium annulatum (as Andropogon annulatus , Poaceae ). INDIA. Saharan Prov., 11 October1888, leg. S.M. Tracy (holotype, BPI 192 888; isotypes, NY, H.U. V. 1858!).

For a complete list of synonyms, see Vánky (2011: 527).

Sori in all spikelets (sterile and fertile) of the inflorescence, 2.0–3.0 × 0.7–1.2 mm, ovoid or ellipsoidal, at first concealed by the glumes, later partially visible between the spreading glumes; initially covered by a thin grayish brown peridium that soon ruptures irregularly exposing a single, stout, tapering, not branching columella with shallow longitudinal furrows, surrounded by a semi-agglutinated, at maturity pulverulent, blackish brown mass of spores and sterile cells. Sterile cells single or in small, irregular groups, globose, subglobose, broadly ellipsoidal or irregular, often collapsed, 9–20(–22) μm long, usually larger than the spores, hyaline; wall 0.8–2.0(–2.5) μm thick, smooth. Spores subglobose, slightly irregular, broadly ellipsoidal, globose or ovoid, (8.5–)9–12(–13) × (8–)8.5–10.5(–11.5) (10.3 ± 0.6 × 9.4 ± 0.7) μm (n/ 1 = 100), medium yellow-brown; wall more or less evenly thickened, 0.6–0.9 μm thick, minutely verruculose, spore profile not affected or slightly affected. In SEM minutely echinulate, spinules up to 0.3 μm high, spore surface densely punctate between the spinules.

Specimen examined: — Isotype of Schroeteria annulata (H.U. V. 1858).

Known host and distribution: —On Poaceae : Dichanthium annulatum (Forssk.) Stapf (incl. D. annulatum var. bullisetosum B.S. Sun & S. Wang ), (?) D. caricosum (L.) A. Camus. Asia ( China, Pakistan, India).

Figures

FIGURES 12–15. Sporisorium andropogonis-annulati (Bref.) S.R. Wang & M. Piepenbr. on Dichanthium annulatum (isotype of Schroeteria annulata, H.U.V. 1858). 12. Habit. 13, 14. Spores in LM. 13. In median view. 14. In surface view. 15. Spores in SEM. Scale bars: 12 = 0.2 cm, 13, 14 = 10 μm, 15 = 5 μm. FIGURES 16–19. Sporisorium sahayae (Mundk.) Vánky on Dichanthium annulatum (isotype, H.U.V. 17 303). 16. Habit. 17, 18. Spores in LM. 17. In median view. 18. In surface view. 19. Spores in SEM. Scale bars: 16 = 0.2 cm, 17, 18 = 10 μm, 19 = 5 μm.