Irregular ovoid to reniform granules; size range. 20–52 μm in length and 17–38 μm in width; clear concentric lamellae; hilum is obscured; presence of a longitudinal cleft
Fabaceae
II
Pyriform to reniform granules; size range, 19–35 μm in length and 16–27 μm in width; faintly visible lamellae; invisible hilum
Fagaceae
III
Multifaceted polyhedral units on one side and dome shaped on the other one; individual granule size, 5–14 μm in length and 5–12 in width; indistinct hilum and lamellae
Poeae
IV
Polyhedral granules with pentagonal or hexagonal faces and rounded off edges; size range, 3–16 μm in length and 2–15 in width; centric distinct hilum; radial fissures; indistinct lamellae
Paniceae
V
Discoidal granules; size range, 6–36 μm in length and 4–30 μm in width; indistinct hilum; concentric, complete and distinct lamellae; sometimes, longitudinal fissures were present.
Triticeae
VI
Ovoidal granules with flattened surfaces; size range, 8–20 μm in length and 7–17 μm in width; indistinct lamellae; deep radial fissures starting from a centric hilum
