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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Pyracantha

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1 Leaf margins crenulate to serrulate for at least ½ the length of the blade.
..2 Leaf blades oblanceolate or obovate, the apices obtuse, emarginate, or short-apiculate; hypanthium and pedicels glabrate
..2 Leaf blades lanceolate, oblong, oblanceolate, ovate-lanceolate, elliptic, or ovate, the apices usually acute or short-apiculate; hypanthium and pedicels finely hairy
1 Leaf margins usually entire, rarely remotely serrulate and only towards the leaf apex.
....3 Calyces and leaf undersurfaces persistently gray-tomentose
....3 Calyces and leaf undersurfaces brown- or yellowish-puberulent when young, becoming glabrescent.
......4 Leaf blades widest near the middle (elliptic, oblong, or oblong-obovate); leaf apices obtuse, apiculate, or aristate; leaf undersurface glaucescent
......4 Leaf blades widest towards the tip (oblanceolate to oblong-obovate); leaf apices notched or truncate; leaf undersurface pale green but not glaucescent
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