Pyracantha

1a.   Leaf-margin not scalloped or only finely toothed    2
b.    Leaf-margin scalloped or conspicuously toothed    3
2a.   Leaves 3-7 cm, elliptic to lanceolate, underside densely covered with hairs              - P. atalantioides
b.   Leaves 2.5- 4.5 cm, oblanceolate to narrowly obovate, underside with few hairs or hairless - P. koidzumii
3a. Calyx and flower-stalks hairless                              4
b. Calyx and flower-stalks covered with hairs                5
4a.  Young shoots with persistent rusty brown hairs                                 -P. crenulala
b. Young shoots with greyish hairs, eventually hairless and dark reddish brown                    -P.rogersiana
5a.   Underside of leaves densely grey hairy P. angustifolia
b. Underside of leaves hairless or sparsely hairy when young                    6
6a. Leaves elliptic to ovate-oblong, widest above the middle, underside hairless             -P. crenatoserrata
b. Leaves narrowly ovate-lanceolate, widest below the middle, underside hairy when young   - P. coccinea