Table 2. Leaf structural traits of 17 Paphiopedilum species. LMA, leaf mass per unit area (g m−2).
| Species | LMA | UET | UCT | LET | LCT | MT | LT | LA | VD |
| malipoense | 116.2±5.1 | 258.8±12.0 | 23.88±0.69 | 84.27±4.42 | 15.22±0.47 | 466.0±22.6 | 847.2±35.7 | 44.82±5.35 | 0.919±0.049 |
| emersonii | 181.9±10.3 | 295.0±7.3 | 22.50±0.61 | 77.12±1.64 | 15.56±0.81 | 734.2±22.2 | 1144.4±21.7 | 40.84±3.92 | 0.880±0.040 |
| micranthum | 165.8±3.7 | 162.8±5.1 | 25.87±1.14 | 70.14±1.64 | 12.32±0.68 | 927.4±21.2 | 1198.5±20.9 | 20.13±2.02 | 1.186±0.057 |
| armeniacum | 139.3±3.1 | 285.7±8.1 | 24.09±0.65 | 81.54±2.87 | 15.15±0.50 | 561.1±16.1 | 967.6±15.0 | 21.41±1.65 | 1.183±0.042 |
| bellatulum | 130.2±6.2 | 553.9±11.7 | 24.78±1.16 | 59.18±1.60 | 13.74±0.75 | 560.7±13.0 | 1212.3±21.9 | 18.42±1.91 | 1.063±0.145 |
| concolor | 116.8±7.4 | 455.9±8.3 | 23.04±2.02 | 66.88±1.73 | 12.38±0.78 | 601.0±26.1 | 1159.2±25.8 | 18.47±1.30 | 1.207±0.099 |
| hirsutissimum | 157.9±7.2 | 304.3±6.3 | 13.42±0.51 | 67.49±2.28 | 9.86±0.60 | 492.0±27.1 | 887.1±29.3 | 39.03±1.83 | 1.328±0.037 |
| tigrinum | 107.3±6.8 | 206.6±18.2 | 21.30±0.95 | 51.99±1.61 | 12.38±0.65 | 348.2±7.3 | 640.5±12.7 | 45.31±4.17 | 1.225±0.045 |
| henryanum | 139.7±12.1 | 271.2±17.4 | 23.18±0.95 | 61.28±2.06 | 14.74±0.41 | 586.6±39.8 | 957.0±58.6 | 30.69±1.34 | 1.213±0.065 |
| charlesworthii | 125.5±3.8 | 374.9±32.9 | 18.59±0.67 | 43.81±1.40 | 13.11±0.39 | 428.8±15.4 | 879.2±39.5 | 16.43±2.68 | 1.496±0.046 |
| villosum | 121.5±12.5 | 149.4±6.1 | 12.82±0.68 | 69.38±2.02 | 10.68±0.38 | 393.6±10.1 | 635.9±17.1 | 64.48±7.20 | 1.195±0.068 |
| gratrixianum | 115.1±4.9 | 104.7±3.3 | 14.47±0.62 | 55.46±1.50 | 10.13±0.69 | 513.6±5.1 | 698.4±5.8 | 41.35±6.34 | 1.191±0.071 |
| insigne | 134.1±6.0 | 198.5±7.7 | 12.46±0.50 | 59.00±2.02 | 10.68±0.53 | 558.7±16.1 | 839.2±16.8 | 44.04±2.53 | 1.020±0.058 |
| dianthum | 237.4±15.1 | 606.2±46.3 | 24.69±1.88 | 66.46±1.50 | 12.41±0.87 | 824.1±40.7 | 1533.8±71.4 | 74.91±5.89 | 0.971±0.038 |
| wardii | 100.8±1.9 | 246.9±9.2 | 16.11±0.62 | 71.25±3.63 | 11.77±0.57 | 405.4±12.8 | 751.4±19.6 | 26.89±1.34 | 0.796±0.047 |
| appletonianum | 138.4±15.8 | 241.2±6.0 | 14.28±0.56 | 91.54±2.80 | 11.86±0.56 | 522.4±29.6 | 881.3±34.2 | 33.76±3.38 | 0.651±0.031 |
| purpuratum | 97.0±3.8 | 318.5±16.4 | 17.57±0.55 | 57.08±1.12 | 12.37±0.64 | 512.8±27.9 | 918.2±39.1 | 26.82±2.28 | 0.628±0.033 |
UET, upper epidermal thickness (µm); UCT, upper cuticle thickness (µm); LET, lower epidermal thickness (µm); LCT, lower cuticle thickness (µm), MT, mesophyll thickness (µm); LT, leaf thickness (µm); LA, leaf area (cm−2); VD, vein density (mm mm−2).