Capsicum carassense

Overview

Capsicum carassense is a wild pepper endemic to the mountains of Minas Gerais, south-eastern Brazil. It grows beneath the trees of the Atlantic Forest, particularly around the Serra do Caraça and nearby ranges. This is a woodland shrub, not a cultivated chilli variety.

The species has a striking combination of features: long, narrow leaves covered with fine hairs; rather large white flowers with deep purple markings; and small, hanging berries that ripen yellowish-green. The fruits are pungent despite their tiny size.

Native range

Minas Gerais, Brazil

Classification

Wild species

Growth

Shrub, usually 1–2 m

Flower

White with purple markings

Ripe fruit

Yellowish-green

Scientific name

Published in 2020

Discovery and naming

Although the name Capsicum carassense was formally published on 4 March 2020, botanists had been collecting the plant for decades. Herbarium records include material from Serra do Caraça collected in 1977, followed by further specimens during the 1980s, 1990s and 2000s. A much older specimen associated with C. F. P. von Martius was later recognised as belonging to the same species.

For years, botanists had placed these plants with Capsicum mirabile, a superficially similar wild Brazilian pepper. When researchers examined their leaves, hairs, flower structures and preserved specimens side by side, consistent differences became clear. The plants from the Caraça area represented a separate species.

The name was established by Gloria E. Barboza and Luciano de Bem Bianchetti, with João Renato Stehmann, in a paper published in PhytoKeys. Its name refers directly to the Serra do Caraça, the mountain region to which it is closely tied.

The designated reference specimen, called the holotype, was collected on 26 October 2014 near the Gruta de Lourdes trail at Serra do Caraça, at about 1,386 m elevation. It is kept in the herbarium at the Federal University of Minas Gerais (BHCB).

Plant and foliage

This species grows as a woody shrub, usually 1–2 metres tall, sometimes approaching 3 metres. Its main stem is fairly thick, and branches spread out and fork. Young stems are green and ridged, while older growth becomes brown.

The plant has a distinctly hairy appearance. Stems, leaf stalks and leaf surfaces carry small hairs, giving them what botanists call pubescence. This is one of the most useful features for distinguishing the species from its lookalikes.

Its larger leaves are narrow and often almost lance-shaped, usually 6–16 cm long but only 0.9–2.5 cm wide. They are dark green above and paler below, with smooth margins and short stalks. At a branch fork, a large leaf may appear beside a much smaller one, producing unequal pairs.

That unusual pairing, together with the slim leaves and spreading branches, gives C. carassense a recognisable woodland-shrub appearance quite different from a typical garden chilli plant.

Flowers

Flowers develop in groups of two to four at the leaf axils. The flower stalks bend sharply near the flower during blooming, a feature known as a geniculate pedicel. The buds begin cream-coloured with greenish-yellow tones.

The open flowers are among the species' most attractive features. Each has five broad, pointed lobes and measures approximately 13–20 mm across. The outer portions are mainly white, while the inner face carries five prominent purple patches around a pale cream centre. Yellow-green colour is also visible near the flower's base.

Beneath the petals is a small calyx with five conspicuous green projections, usually 3–4 mm long and occasionally reaching 5 mm. These are longer than those of the similar C. mirabile, and help botanists identify the plant even in preserved specimens.

Fruit and seeds

After flowering, the stalk turns downward and carries a small, somewhat flattened round berry. The fruit starts green and becomes yellowish-green when ripe, rather than turning red. It is only around 6–7 mm across, with a glossy, hairless surface.

Researchers recorded the berries as pungent. The species has not been established as a culinary variety, but its fruit shows that even very small wild berries can possess the familiar heat of a chilli.

Each fruit contains approximately 7–13 seeds. They are relatively large for such a small berry, dark brown to black, and have a deeply textured surface. The persistent green calyx and its five projecting teeth remain visible at the top of the fruit.

These features—tiny yellow-green fruit, dark seeds and long calyx projections—are particularly useful in identifying this species when flowers are no longer present.

Habitat and native range

Capsicum carassense has a restricted range in the mountains of south-eastern Minas Gerais. It is documented from Serra do Caraça and surrounding areas including Serra do Gandarela, Serra do Capanema and Serra Geral, within the region sometimes called Brazil's Iron Quadrangle.

The plant occurs in the shaded, moist understorey of semi-deciduous montane Atlantic Forest, generally at elevations of around 1,000–1,390 m. Some recorded specimens come from higher sites. Unlike many familiar chillies that are cultivated in sunny open fields, this wild species is associated with forest cover and mountain conditions.

Based on collections cited in the original paper, flowering has been recorded mostly from October through January, with an additional May record. Fruiting specimens were collected in December, February and April. These dates reflect observed flowering and fruiting in the wild.

How it differs from Capsicum mirabile

Capsicum carassense looks much like C. mirabile at first glance: both have bent flower stalks, spotted flowers, hanging greenish-yellow fruits and dark seeds. Their similarity explains why specimens sat under the same name in botanical collections for so long.

Leaves and hairs

C. carassense has noticeably hairier stems and leaves, and its major leaves are usually long and narrow with blunt to pointed tips. C. mirabile is generally less hairy and usually has broader leaves with more elongated, tapered tips.

Flower buds and calyx

In C. carassense, young flower buds are cream with greenish-yellow colour, while those of C. mirabile are often purple. The calyx projections are also longer in C. carassense, reaching 5 mm rather than usually remaining below 3 mm.

Flower size and location

The open flowers of C. carassense are larger, around 13–20 mm wide, compared with about 9–13 mm in C. mirabile. Their habitats also differ: C. carassense is restricted to the Caraça mountains and nearby forest, while C. mirabile has a broader distribution in eastern and southern Brazil.

Even though the two species resemble one another, genetic work discussed by the researchers places them in different branches of the Atlantic Forest group, rather than as immediate sister species.

Conservation

When the species was described in 2020, the researchers gave it a preliminary Endangered assessment under IUCN criteria. Their estimate indicated an extent of occurrence of about 483 km² and an area of occupancy of around 32 km². This was a scientific assessment using IUCN methods, not a claim that a separate official Red List entry has been confirmed.

Its restricted distribution makes habitat protection particularly important. Much of its range lies within the Iron Quadrangle, a region with major iron-mining activity. The original paper highlights forest loss and fragmentation associated with mining, dams and urban expansion as significant pressures.

The fact that earlier botanists had mistaken it for C. mirabile is also a reminder that careful identification matters in conservation. Recognising C. carassense as a distinct species has made it possible to understand its restricted range and assess the threats to its populations more accurately.