The stem wax of the grass Leptochloa digitata (R.Br.) Domin. has been examined mainly by gas chromatographic methods. The wax after hydrolysis has been shown to consist largely of straight-chain acids (54%) and n-paraffin hydrocarbons (21%). Straight-chain alcohols and ketones are also present, along with other alcohols and ketones which were not examined. A feature of the wax is the presence of small amounts of hydrocarbons with very long chains (2.5%) from which n-dohexacontane (C62H126) has been isolated and identified by its X-ray long spacing and melting point.