Are Calendula and Psidium Guajava in the same botanical family?

No — Calendula is Asteraceae and Psidium Guajava is Myrtaceae.

Can you substitute Calendula for Psidium Guajava?

They come from different families (Asteraceae and Myrtaceae), so direct substitution is uncommon.

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Calendula vs Psidium Guajava

Calendula officinalis · Psidium guajava

Calendula

Calendula officinalis

T Traditional Use

Family: Asteraceae
Genus: Calendula
Primary use: medicinal

Calendula officinalis, Mary's gold, common marigold, the pot marigold, Scotch marigold, or ruddles, is a flowering plant in the daisy family, Asteraceae. It is probably native to southern Europe, but its long history of cultivation makes its precise origin unknown, and it is wide…

Psidium Guajava

Psidium guajava

T Traditional Use

Family: Myrtaceae
Genus: Psidium
Primary use: medicinal

Psidium guajava, the common guava, yellow guava, lemon guava, or apple guava is an evergreen shrub or small tree native to the Americas. It is pollinated by insects. When cultivated, it is pollinated mainly by the common honey bee, Apis mellifera.

At a glance

· Different families — Asteraceae vs Myrtaceae.
· Both are primarily medicinal.
· Evidence tiers — Calendula: T; Psidium Guajava: T.