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From Pathfinder Treasure Vault (Remastered), which isn't enabled.

Solar Shellflower

ITEM 5
Price 160 gp
Usage held in 2 hands
Bulk 1
Category simple
Group firearm
Damage 1d6 fire
Range 70 ft.
Reload 1

This +1 striking flintlock musket features multiple triangular panels that can be folded out of the stock, like the petals of a tigridia flower, that collect sunlight and feed it into the spark gun's core. All damage dealt by a solar shellflower is fire damage.

Activate (manipulate)
Frequency once per day (but see below)

Effect One of the panels from the solar shellflower detaches and unfurls into a tigridia-shaped construct of flame. For the next 1 minute, whenever you Strike an enemy with the solar shellflower, the construct fires a smaller jet of fire that automatically hits the target, dealing 3d4 additional persistent fire damage or twice that on a critical hit. The solar shellflower usually requires a full day to replenish enough solar energy to recharge this Activation, but if used in an environment with especially strong sunlight, such as in a desert, cliff above the clouds, or near the summer solstice, it can recharge in 1 hour instead.
Pathfinder Treasure Vault (Remastered)ORC