The specific epithet diceratum is Greek for "two horns", referring to the two appendages that are present on the bend of the gynostemium.

The longer leaves are lanceolate and the shorter ones are spathulate, forming a basal rosettes around the stem.

S. diceratum is only known from the type location, which is at creek crossings on the road to Beverley Springs in the Kimberley region of Western Australia.

It grows in the presence of S. ceratophorum, S. rubriscapum, Drosera caduca, D. paradoxa, Byblis liniflora, and Grevillea pteridifolia.

S. diceratum is most closely related to S. longicornu, but it can be confused with S. ceratophorum, which also has an orange corolla but twice as large.