Fig 1. a-1. The pollen has a 3-hole groove; a-2. and
a-3 . The pollen size is about 24 X 14 um, the pollen shape is a
long-ball shape with a 3-sided circular shape on the polar surface;a-4 . The exine surface has a mesh pattern, which is irregularly
shaped, and the side of the mesh backbone grain is occasionally seen.
b-1. The pollen has a 3-hole groove, the polar view with 3
parts is round and the polar region is small and raised, and the hole is
not obvious; b-2. and b-3. The equatorial plane is oblong, the
pollen size is about 21X12 um, the pollen shape is long-balloon.b-4. The exine surface has a mesh pattern, the mesh backbone is
wide, and the mesh circle is irregularly rounded, and there are few
particles inside the mesh.