Grevillea pythara, also known as the Pythara grevillea, is a shrub of the genus Grevillea native to a small area in the Wheatbelt region of Western Australia. The suckering shrub typically grows to a height of 0.06 to 0.3 metres (0.2 to 1.0 ft) and has non-glaucous branchlets. It has simple linear undissected flat leaves with a blade that is 7 to 16 millimetres (0.28 to 0.63 in) long and 1.5 to 4 mm (0.06 to 0.16 in) wide. The leaves are grey-green in colour and covered in fine hairs. It blooms from May to October and produces a terminal raceme irregular inflorescence with red or blue flowers and red styles.