Search on : Taxa descriptions


Page number:19 
Remarks (internal):Tilletia thailandica differs from the similar T. kenyana, in which the spores are 13-19 µm long, pale yellow or pale yellowish-brown, and are provided with 1.5-2.5(-3) µm high, blunt, subpyramidal warts, 17-21 on the equatorial circumference, embedded in a hyaline sheath.  
Description type:Original description 
Description:Tilletia thailandica Vánky & R.G. Shivas, sp. nov.
Sori (Fig. 2) in some ovaries of an inflorescence, inconspicuous, ovoid or ellipsoidal, 0.3-0.5 x 0.4-1 mm, more or less hidden by the floral envelopes, at first covered by a thin, dark greyish peridium of the pericarp which ruptures irregularly disclosing the black, semiagglutinated to powdery mass of spores and sterile cells or the sori disintegrate into small pieces. Spores (Figs. 6, 7) globose, subglobose to broadly ellipsoidal, 16-21 x 17.5-21.5 µm, yellowish- to dark reddish-brown; wall even, provided with 2-2.5 µm high warts with flattened, rarely subacute tip, in surface view appearing as densely situated, irregularly polyangular, dark spots, 5-7 per spore diam., separated by regularly narrow, bright lines, in median view 21-29 warts on the equatorial circumference, hyaline sheath absent. Sterile cells (Figs. 6, 7) varying in size, colour and ornamentation, globose, subglobose to ellipsoidal, 8-23 x 9.5-25 µm, subhyaline to pale yellowish-brown; wall even, 0.5-1.5 µm thick, smooth, finely, regularly, sparsely verrucose or with irregularly grouped, large, cylindrical warts.
On Eragrostis amabilis (L.) Wight & Arn.; S.E. Asia (Thailand). Known only from the type locality.
Taxon name: