Aerial parts of Helianthus strumosus gave the C-2' epimer of the heliangolide 2',3'-dihydrobudlein A as well as the flavones nevadensin, hymenoxin, sudachitin and acerosin, and three ent-pimaranes, two of which, ent-pimara-7,15-dien-19-oic acid and ent-7-oxopimara-8,15-dien-19-oic acid, are new. H petiolaris furnished the heliangolide budlein A, ciliaric acid, and several ent-kauranoic acids, including the new ent-16β,17-dihydroxykauran-19-oic acid. H hirsutus gave three known chromenes, hymenoxin, budlein A, two new diterpenes ent-8(R),15(S)-epoxy-12β-acetoxy-16-hydroxypimar-9(11)-en-19-oic acid and ent-12a-acetoxypimar-9(11)-en-19-oic acid and a new fatty acid derivative 9,16-dioxooctadec-10,12,14-trienoic acid