the sporangium containing microspores. cf. megasporangium
• (n.) A sporangium or conceptacle containing only very minute spores. Cf. Macrosporangium.
(from the article `plant`) ...divides mitotically to form the embryo, which then develops into the sporophyte. Eventually the sporophyte produces sporangia, which bear ... ...gametophytes and the microspores into male gametophytes. Accordingly, strobili bear megasporophylls that contain megasporangia, which will produce ... [9 relate...
Mi`cro·spo·ran'gi·um noun [ New Latin See Micro- , and Sporangium .] (Botany) A sporangium or conceptacle containing only very minute spores. Confer Macrosporangium . 
microsporangium A structure in which microspores are formed.
noun a plant structure that produces microspores