The ether extract of the root of Angelica decursiva FR. et SAV. (Umbelliferae) gave two new crystalline coumarins, decursin (I), C₁₉H₂₀O₅, mp 110-111°, [a]¹⁵_D+172.9°and decursidin (II), C₂₄H₂₆O₇, mp 60-62°, [a]²³_D-44.8°, and a new non-crystalline coumarin (III), C₂₄H₂₈O₇, [a]_D 0°, in addition to known coumarins, nodakenetin and umbelliferone. The structures of I and II were established as 3'-senecioyloxy-3', 4'-dihydroxanthyletin and 3', 4'-disenecioyloxy-3', 4'-dihydroxanthyletin, respectively. The coumarin III was shown to be the angeloylisovaleroyl diester of 3', 4'-dihydroxy-3', 4'-dihydroxanthyletin. The stereochemistry of these coumarins and the location of the acyl groups in III are under investigation.