Twelve compounds have been isolated from the aerial parts of Eriostemon rhomboideus, six of which are novel. The novel compounds have been characterised as the ¯avones, 3,5,7,8,3',4'-hexahydroxy¯avone-3-O-b-glucopyranoside-7-methyl ether and 3,5,7,8,3',4',-hexahydroxy¯avone-3-O-(6-p-coumaroyl)-b-glucopyranoside-7-methyl ether, the 2-alkylbenzopyrans, 5,7-dihydroxy-2-heptacosanylbenzopyran-4-one and 2x,5,7-trihydroxy-2-heptacosanyl-2,3-dihydrobenzopyran-4-one, glyceryl-1-tetracosanoate and the coumarin, isobaisseoside-3'-p-coumarate {esculetin-7-O-(3-p-coumaroyl-6-a-rhamnopyranosyl)-b-glucopyranoside}. The known compounds were eriostoic acid, eriostemoic acid, hesperidin, sitosterol-3-O-b-glucopyranoside and a mixture of catechin and epicatechin. The chemotaxonomic importance of the isolation of a coumarin glycoside is noted.