Cryptocoryne parva is one of the smallest crypts. It is great for the foreground of your aquarium because it can tolerate many different conditions. It's a great crypt option for beginners. 

Common Name: Cryptocoryne parva
Family Name: Araceae
Native To: Sri Lanka
Lighting: Medium
pH: 6 - 8
Growth Demands: Easy
Growth Form: Rosette
Growth Rate: Medium
True Aquatic: Yes
Placement in Tank: Foreground
Available As: Bare Root, Potted