Capsicum benoistii

Overview

Capsicum benoistii is a wild member of the pepper genus native to Ecuador. Unlike the widely cultivated chillies associated with Capsicum annuum or C. chinense, this species is known mainly through pressed herbarium specimens and published botanical descriptions.

Its distinguishing traits include paired leaves of unequal size and small clusters of flowers with long, narrow, pointed corolla lobes. The original scientific description brought together old collections to establish the species as distinct from other Andean Capsicum.

Native to

Ecuador

Known regions

Tungurahua and Loja

Habitat

Andean montane forest

Recorded elevations

1,500–2,600 m

Earliest collection

1931

Formally described

2019

Discovery and historical records

On 3 April 1931, botanist Raymond Benoist collected a flowering specimen near Baños in Ecuador's Tungurahua province. The specimen, Benoist 4204, became the type material for the species: the physical reference used to define its scientific name.

Armando T. Hunziker later recognised the material as an undescribed species and proposed the name benoistii, honouring its collector. The name remained unpublished until Gloria E. Barboza and colleagues formally described it in a study published on 16 January 2019. The author citation Hunz. ex Barboza reflects that history.

The 2019 description and the 2022 Capsicum monograph document three historic gatherings:

The collections are separated by decades and were made in two different Ecuadorian provinces. The published treatments report no later collection, despite searches around known localities.

Botanical features

Capsicum benoistii grows as an upright, sparsely branched shrub. Young stems are light brown, sometimes with fine hairs, while older stems develop darker bark. The leaves are thin, darker green above and lighter below.

Leaves

Leaves often appear in unequal pairs. The larger blades are approximately 8.5–12 cm long, while the smaller ones measure around 2.4–6 cm. This uneven pairing is one of the traits useful when comparing the species with its relatives.

Flowers

Flowers occur in groups of three to six, carried on slender, drooping stalks about 13–20 mm long. Each flower has a short, cup-shaped calyx with five narrow appendages.

The corolla measures roughly 12–13 mm long and is deeply divided into narrow, pointed lobes, giving the flower a distinctly star-like shape. The lobes are much longer than the corolla tube. The species also has flowers with two different style lengths, reported at approximately 6.5 mm and 3.6 mm, a condition described as heterostyly.

The material cited in the original descriptions was collected in flower rather than fruit, so a reliable fruit description or Scoville rating cannot be drawn from those specimens.

View the original botanical illustration in the 2019 paper →

Habitat and distribution

The known range of C. benoistii lies in Ecuador's Andes, with records from Tungurahua and Loja. Botanical descriptions place it in thickets within montane forest, at elevations of about 1,500–2,600 metres.

The three published collections were made between March and May and all contained flowers. These dates describe when the species was recorded flowering, not necessarily its full flowering season.

Because the historic localities are widely separated and collections are rare, the complete distribution of this species remains uncertain. Its records nevertheless show that wild Capsicum diversity extends beyond the warmer lowland habitats usually associated with chilli peppers.

Relationship to other wild peppers

The species shares some characteristics with Capsicum geminifolium, another Andean wild pepper, especially its pairs of unequal leaves. Their flowers, however, provide important differences.

C. benoistii has comparatively short flower stalks, a deeply divided corolla and two documented style lengths. C. geminifolium has longer stalks, a more bell-shaped corolla and one style form in the published comparison.

Its precise position within the genetic relationships of Capsicum was not resolved in the published treatment, because suitable fresh material for DNA study was unavailable. That makes its distinct floral structure especially important for identification.

Conservation

The 2019 description and 2022 monograph assessed Capsicum benoistii as Endangered using IUCN criteria. This was a published research assessment and should not be confused with confirmation of a separate official IUCN Red List entry.

The 2022 monograph estimated an area of occupancy of approximately 12 km². The small number of known localities, possible habitat pressures and lack of recent verified collections support concern for the species' conservation.

Not having a more recent collection does not prove that the plant is extinct. Further surveys in suitable Andean habitats, particularly around its historical sites, are important for determining where it survives and how best to protect it.