Fig. 1

Seedlings of P. yunnanensis at different grades. I: Grade I ≥ H + 1/2σ; II: H − 1/2σ ≤ Grade II < H + 1/2σ; III: Grade III < H − 1/2σ.

Seedlings of P. yunnanensis at different grades. I: Grade I ≥ H + 1/2σ; II: H − 1/2σ ≤ Grade II < H + 1/2σ; III: Grade III < H − 1/2σ.