Heminoitis arifolia
Native range: Southeast Asia
Known names: Heart Fern
Hardiness: Best kept above 65°F
Mature Size: ~7" Tall x ~7" Wide
Light: Early morning sun, dappled light, diffused light. 
Water: Keep soil moist
Soil: Standard potting soil.
Dormancy Period: N/A
Pet-Safe: Yes
Plant Size: Grown in 4" pot, shipped semi-bare-root
 
This is one of the fern that you should keep quite humid and don't let the soil dry out, even slightly. Heart/arrow-shaped fronds on black stem.