Highslide JS
Macalpinomyces siamensis on Coelorachis striata.
Highslide JS
Macalpinomyces siamensis on Coelorachis striata - BRIP 47765.
Scale bar = 1 mm.
Highslide JS
Macalpinomyces siamensis on Coelorachis striata - BRIP 47765.
Scale bar = 10 µm.
Highslide JS
Macalpinomyces siamensis on Coelorachis striata - BRIP 47765.
Scale bar = 1 µm.
Highslide JS
Distribution of Macalpinomyces siamensis.

Macalpinomyces siamensis R.G. Shivas, Vánky & Athipunyakom

Description

Sori in some ovaries of an inflorescence, long cylindrical, 1-2 × 10-20 mm, often bent or twisted, covered by a thick, hispid, first green later brown peridium of host origin which splits longitudinally at maturity, dispersing the dark brown, semiagglutinated to powdery mass of spores and sterile cells.

Spores globose, subglobose to broadly ellipsoidal, 6.5-9 × 7-9.5 µm, medium dark olivaceous brown; wall even, 0.5-1 µm thick, provided with moderately densely situated, c. 0.5 µm high, 0.3-0.4 µm wide spines, spore profile finely serrate.

Sterile cells in loose, irregular groups, single cells globose, subglobose or broadly ellipsoidal, varying in size, 6.5-14.5 × 6.5- 17 µm, subhyaline; wall even, c. 0.5 µm thick, smooth, content homogenous.

Hosts
   
Host family: Poaceae
   
Host species: Coelorachis striata (Nees ex Steud.) A.Camus.

Distribution

Provinces: Chiang Mai