Only in one of 12 investigated species i.e. in <i>Solanum chacoense (gibberulosum)</i> which became pollen staining red when treated with I+KI was been found. However in three forms:<i> Solanum verrucosum</i>, 133 <i>Solanum chacoense (Schickii)</i> and 127 <i>Solanum chacoense (gibberulosum)</i> the dimorphism of starch grains within the anther wall has been observed. It can be assumed that in these forms starch with a prevailing amount of amylopectin will be formed.