Packaged and shipped exclusively by Wekiva Foliage, the scientific name for the heart leaf fern is Hemionitis arifolia and is commonly referred to by a number of names, including tongue fern. First identified in 1859, heart leaf ferns are native to Southeast Asia, it is a delicate dwarf fern, which is also an epiphyte, meaning it grows upon trees as well, this fern presents itself with dark green, heart-shaped fronds, about 2 in. to 3 in. (5 cm-8 cm.) long and borne on black stems, reaching a height of between 6 and 8 in. (15 cm-20 cm.) tall. Leaves are dimorphic, meaning some are sterile and some are fertile, the sterile fronds are heart shaped upon a 2 in. to 4 in. (5-10 cm.) thick stalk, while the fertile fronds are shaped like an arrowhead on a thicker stalk. Providing your heart fern with indirect sunlight from a nearby window is the best choice, they do need light but not direct sunlight as it will scorch the leaves. Growing in the tropics, they are partially shaded by the tree canopy, so it thrives with filtered light, the heart fern likes to be moist at all times but never soggy. Letting your fern sit in too much water will cause root rot. Put water only when the first in. of soil is dry, this may be once a week or every other week, depending on the humidity in your home. Keeping your heart fern warm is essential to its health, it does not like any temperature below 60 degrees, the best temperature for a healthy fern is between 60° and 80°.