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Undersurface smooth or not

The undersurface of the leaf (or leaflet in the case of compound leaves).


L36 smooth

(when viewed with a lens) The undersurface is neither hairy nor prickly .

L37 hairy or sandpapery

(when viewed with a lens) The undersurface is clothed in hairs or short sharp prickles which give it a rough texture. The minimum requirement for a hairy undersurface is that the midrib and all the main lateral veins are either hairy or prickly.