These large trees are native in North America, eastern Europe, and Asia and are characterized by scaling bark; large, deciduous, usually palmately lobed leaves; and globose heads of flower and seed.
Heads are globose, about 1.5 cm in diameter and support yellow flowers.
On the other hand, A. niger KIBGE-IB36 showed large, globose, dark brown conidial heads with hyaline and smooth conidiophores.
However, it must be pointed out that this is in contradiction with our morphological observations which demonstrated significant morphological similarities, that is, biseriate conidial heads, large globose vesicles, ascostromata when teleomorph present, and suggest a possible common origin of these sections.
Under stereoscopic observation, the conidial heads were found to be globose, radiating, split into columns, greyish metallic in colour and measured up to 260 × 260 μm in size.
Conidiophores were smooth-walled; the conidial heads appeared biseriate and conidia seemed globose to subglobose in shape, rough-walled, and black in color (Salar and Aneja 2007).
The four nuclei (dentate, globose, emboliform, and fastigial) each communicate with different parts of the brain and cerebellar cortex.
The spores are globose (tetrahedral).
The spores are globose and trilete.
These globose types are called Globigerina (their genus name).
