Assertion: willow's leaf | /r/HasProperty | duller green
Facets:
value: on the upper surface
type: LOCATION
Source sentences:
text: The leaves most closely resemble those of Pussy Willow (Salix discolor), which has similar venation but the main veins are irregularly spaced and fewer in number, its fruiting catkins are more loosely arranged, each fruit on a stalk 2 to 3 mm long; leaves are duller green on the upper surface, twigs are dull yellowish to reddish-brown, and it sometimes forms a small tree.