Description
Chilli Name: RHOMBOIDEUM (PI 645680)
Chilli Species: Rhomboideum
Chilli Origin: Mexico
Chilli Heat: Unknown
A very unusual and scarce wild Capsicum species initially believed to be a sister to Capsicum Tovarii although after further study by Eshbaugh in 1988, it has since been omitted from Capsicum species list. Native to Southern Mexico and South America, this species has pubescent stems and leaves and yellow flowers. The tiny red fruits have no heat. Now a synonym for Witheringia ciliata although more recently it has been reclassified (yet again) as Capsicum rhomboideum.
Capsicum rhomboideum is one of the most unusual and ancient wild chilli species, easily recognised by its distinct yellow flowers and unique rhomboid-shaped leaves. Native to Central and South America, this species sits on the far edge of the Capsicum family tree—genetically distant from domesticated chillies and lacking the characteristic capsaicin heat.
Despite producing small, round berries that resemble tiny chillies, Capsicum rhomboideum is completely heatless. Its fruits are mildly bitter and more of botanical interest than culinary value. What makes it truly special is its evolutionary divergence—making it a key species for genetic research and biodiversity preservation.
Growing PI 645680 requires patience, especially during germination, but the plant is relatively hardy once established. It prefers warm conditions with good airflow and can be grown as an ornamental or conservation specimen. A must-have for collectors and anyone curious about the wilder side of chillies.
