Pine species | Number of needles in a fascicle and number of stomatal rows, mean of 20 needles in this study | Typical length of needles and their longevity; mean length of 20 needles in this study |
P. albicaulis White bark pine | 5 9.3 | 3 - 7 cm, 5 - 8 yrs 4.78 cm |
P. attenuata Knob cone pine | 3 24.4 | 9 - 15 cm, 4 - 5 yrs 12.21 cm |
P. coulteri Coulter pine | 3 22.5 | 16 - 30 cm, 3 - 4 yrs 19.55 cm |
P. jeffreyi Jeffrey pine | 3 16.00 | 12 - 15 cm, 4 - 6 yrs 9.76 cm |
P. monophylla Single leaf pinyon | 1 25.8 | 3 - 6 cm, 4 - 12 yrs 3.75 cm |
P. muricata Bishop pine | 2 12.4 | 7 - 15 cm, 2 - 3 yrs 9.33 cm |
P. ponderosa Ponderosa pine | 3 18.7 | 17 -25 cm, 4 - 6 yrs 15.30 cm |
P. lambertiana Sugar pine | 5 ? | 6 - 11 cm, 2 - 4 yrs ? |