AGARICACEAE
   * Coriolus maximus [Harman]

     APOCYNACEAE
   * Amsonia tabernaemontana [Harmine etc.]
   * Apocynum cannabinum [Harmalol]
   * Ochrosia nakaiana [Harman]

     BIGNONIACEAE
   * Newbouldia laevis [Harman]

     CALYCANTHACEAE
   * Calycanthus occidentalis [Harmine]

     CHENOPODIACEAE
   * Hammada leptoclada [Tetrahydroharman etc.]
   * Kochia scoparia [Harmine etc.]

     COMBRETACEAE
   * Guiera senegalensis [Harman etc.]

     CYBERACEAE
   * Carex brevicollis [Harmine etc.]

     ELAEAGNACEAE
   * Elaeagnus augustifolia [Harman etc.]
   * Elaeagnus hortensis [Tetrahydroharman etc.]
   * Elaeagnus orientalis [Tetrahydroharman]
   * Elaeagnus spinosa [Tetrahydroharman]
   * Hippophae rhammoides [Harman etc.]
   * Shepherdia argentea [Tetrahydroharmol]
   * Shepherdia canadensis [Tetrahydroharmol]

     GRAMINEAE
   * Arundo donax [Tetrahydroharman]
   * Festuca arundinacea [Harman etc.]
   * Lolium perenne [Harman etc.]

     LEGUMINOSAE
   * Acacia baileyana [Tetrahydroharman]
   * Acacia complanata [Tetrahydroharman etc.]
   * Burkea africana [Harman etc.]
   * Desmodium pulchellum [Harman etc.]
   * Mucuna pruriens [6-Methoxy-Harman]
   * Petalostylis labicheoides [Tetrahydroharman]
   * Prosopis nigra [Harman etc.]

     LOGANIACEAE
   * Strychnos usambarensis [Harman]

     MALPIGHIACEAE
   * Banisteriopsis caapi [Harmine etc.]
   * Banisteriopsis lutea [Harmine]
   * Banisteriopsis muricata [Harmine]
   * Callaeum antifebrile (= Cabe paraensis) [Harmine]

     MYRISTICACEAE
   * Virola cuspidata [6-Methoxy-Harman]

     PASSIFLORACEAE
   * Passiflora actinea [Harman = Passiflorine]
   * Passiflora alata [Harman]
   * Passiflora alba [Harman]
   * Passiflora bryonoides [Harman]
   * Passiflora caerulea [Harman]
   * Passiflora capsularis [Harman]
   * Passiflora decaisneana [Harman]
   * Passiflora edulis [Harman]
   * Passiflora eichleriana [Harman]
   * Passiflora foetida [Harman]
   * Passiflora incarnata [Harmine, Harmaline, Harman, etc.]
   * Passiflora quadrangularis [Harman]
   * Passiflora ruberosa [Harman]
   * Passiflora subpeltata [Harman]
   * Passiflora warmingii [Harman]

     POLYGONACEAE
   * Leptactinia densiflora [Leptaflorine, etc.]
   * Nauclea diderrichii [Harman etc.]
   * Ophiorrhiza japonica [Harman]
   * Pauridiantha callicarpoides [Harman]
   * Pauridiantha dewevrei [Harman]
   * Pauridiantha lyalli [Harman]
   * Pauridiantha viridiflora [Harman]
   * Simira klugii [Harman]
   * Simira rubra [Harman]
   * Uncaria attenuata [Harman]
   * Uncaria canescens [Harman]
   * Uncaria orientalis [Harman]

     SAPOTACEAE
   * Chrysophyllum lacouritianum [Norharman etc.]

     SYMPLOCACEAE
   * Symplocos racemosa [Harman]

     ZYGOPHYLLACEAE
   * Fagonia cretica [Harman]
   * Peganum harmala [Harmaline, Harmine, etc.]
   * Tribulus terrestris [Harmine etc.]
   * Zaygophyllum fabago [Harmine etc.]