Sporisorium hainanae (Zundel) L. Guo

Synonyms

Sphacelotheca hainanae Zundel
Sphacelotheca tonglinensis var. hainanae (Zundel) L. Ling

Description

Sori in all ovaries of an inflorescence, ellipsoidal, 2–4 mm long, 0.5–1.5 mm wide, ±hidden by the floral envelopes, at first covered by a light brown peridium that ruptures irregularly revealing a dark brown powdery mass of spores and sterile cells surrounding a simple central columella, often with thin short or long apical branches.

Spores when mature solitary, globose, subglobose to broadly ellipsoidal, 8–10 × 6.5–9.0 µm, yellowish brown; wall uniformly c. 0.5 µm thick, moderately densely low-echinulate; spore profile wavy to finely serrulate.

Sterile cells in irregular groups; individual cells subglobose, ellipsoidal, usually rounded-irregular with 1 or several slightly flattened sides, 8–16 µm long, subhyaline to pale yellowish brown-tinted, collapsed in old specimens; wall 0.5–1.5 µm thick, smooth.

Hosts
   
Host family: Poaceae
   
Host species: Ischaemum rugosum Salisb.

Distribution

States & Territories: QLD

Comments

In Australia, known only from a single collection (mixed with S. ischaemi-rugosi) on Ischaemum rugosum from Horn Island in the Torres Strait, far-northern Qld; also in South and East Asia.