Data Species | Epidermal layers | Hypoderm layers | Cortex cells | Vessels clusters | Wood porous | Pith cells |
H. arbainense | one | One, elongated | Angular | Two groups | Diffuse | Rounded |
H. longiflorum | one | Two, elongated | Normal | Three groups | Diffuse | Rounded |
H. petrocarpum | two | One, elongated | Normal | two groups | Diffuse | Rounded |
H. strigosium | one | Two, elongated | Lacunar | Three groups | Un-diffuse | oval |
H. zeylanicum | one | Three, rounded | Normal | Three groups | Diffuse | Rounded |
H. jizanense | two | One, elongated | Angular | Three group | Diffuse | oval |
H. lasiocarpum | one | One, elongated | circular | Three group | Diffuse | rounded |