Geosiris aphylla is a species in the flowering plant family Iridaceae, first described in 1894.

[1] Geosiris aphylla is sometimes called the earth-iris.

It is a small myco-heterotroph lacking chlorophyll and obtaining its nutrients from fungi in the soil.

[2] Its rhizomes are slender and scaly, and stems are simple or branched.

Geosiris aphylla is native to central and eastern Madagascar.