Capsicum pereirae

Overview

Capsicum pereirae is a wild pepper endemic to eastern Brazil. It is a shrub of the Atlantic Forest, growing under the cover of moist mountain vegetation rather than in open fields. Although it belongs to the same genus as jalapeños, habaneros and sweet peppers, its appearance is quite different: slender horizontal branches form a loose zigzag outline, the leaves feel distinctly leathery, and the tiny ripe berries are greenish-golden yellow rather than red.

The flowers are the most immediately recognisable part of the plant. Their five white lobes carry purple to reddish-brown markings over a greenish-yellow centre, creating a sharply patterned star. Yet there is considerable variation: some flowers are only faintly marked and a few can be almost entirely white. They hang on long, curved stalks, and the green cup beneath each flower has no obvious projecting teeth. Together, these features separate the species from several other wild Brazilian peppers with similar flowers.

The fruits are pungent, although the original 2005 description characterised them as only slightly hot. They contain several relatively large, dark seeds and eventually detach from the plant. C. pereirae was named in 2005 to honour Edmundo Pereira, the Brazilian botanist who collected the specimen used to define the species in December 1956. Its range is now known to extend beyond the two Brazilian states recorded in the original description.

Scientific name

Capsicum pereirae Barboza & Bianch.

Family

Solanaceae

Native country

Brazil (endemic)

Known states

Bahia, Espírito Santo, Minas Gerais, São Paulo

Evolutionary group

Atlantic Forest clade

Growth habit

Shrub, usually 0.8–3 m

Type specimen collected

6 December 1956

First scientific description

13 December 2005

Flowers

White, purple and greenish-yellow markings

Flower calyx

No teeth or 5 minute teeth

Ripe fruit

Greenish-golden yellow; 6–10 mm

Pungency

Pungent, described as slight in 2005

Mature seeds

Brownish-black to black

Elevation

About 500–1,650 m

Chromosomes

2n = 26

Conservation

Preliminary Least Concern (2022)

Discovery & naming

The name of this species preserves the work of Edmundo Pereira (1914–1986), a Brazilian self-taught botanist and plant collector. On 6 December 1956, Pereira collected a flowering shrub near Castelo–Forno Grande in Espírito Santo. His collection, numbered Pereira 2245, included a brief observation in Portuguese describing a white flower marked brown on the inside. Decades later, that preserved material became the reference specimen for the new scientific name.

The principal specimen, called the holotype, is held at the CORD herbarium in Córdoba, Argentina, under accession CORD00006630. Duplicates are held in CORD and the Brazilian HB and RB herbaria. The labels and collection number allow botanists to connect the present-day name to a particular wild plant, rather than to a garden variety or an uncertain drawing.

Research continued before the species was named. In 1970, collectors gathered plants around Pico do Pião in Serra do Ibitipoca, Minas Gerais. Further collections were made in the 1980s and 1990s, including a 1986 visit to Caxixe Alto and later work near the moist forest and grottoes of Ibitipoca State Park. Some seeds collected around Caxixe Alto were subsequently grown at the Federal University of Viçosa, allowing scientists to examine flowering and fruiting specimens raised from known wild material.

On 13 December 2005, botanists Gloria E. Barboza and Luciano de Bem Bianchetti published Three New Species of Capsicum (Solanaceae) and a Key to the Wild Species from Brazil in Systematic Botany. In that paper they described Capsicum pereirae alongside C. friburgense and C. hunzikerianum. Their work combined a formal description, a detailed botanical illustration, field photographs, examination of specimens and a key to distinguish wild Brazilian species.

The name pereirae is a dedication, not a reference to a fruit characteristic or town. The authors explicitly honoured Pereira for his botanical collecting work. The original study recognised the species from Espírito Santo and Minas Gerais; the much larger 2022 monograph extended its documented distribution into Bahia and São Paulo. This change reflects additional identified collections and a more complete review, rather than a recent deliberate introduction to those states.

Plant & foliage

Capsicum pereirae generally grows as an upright shrub between 0.8 and 3 metres tall, with smaller individuals also recorded. The 2022 monograph notes exceptional reports of taller plants but marks the upper estimate as uncertain. Its branches are comparatively thin, often held nearly horizontally and changing direction at their joints; this gives the plant a loose zigzag silhouette instead of the short, dense shape of many garden chillies.

Young stems are green with whitish mottling, somewhat angled, fragile and almost completely hairless. The swollen-looking nodes can be distinctly purple. Older bark turns brown. Unlike the pale dotted bark of some other wild peppers, mature branches of C. pereirae are described as lacking visible lenticels. These small features are useful in preserved plant material where the flowers may have fallen.

Leaves are arranged in unequal pairs. The larger blade is most often 9–15 cm long and 2–4 cm wide, though exceptional examples reach about 20 cm long. Its much smaller companion is usually around 2.5–3 cm long, occasionally longer. Both are usually elliptical to narrowly elliptical, with pointed tips, mostly smooth edges and a slight asymmetry near the base. The larger leaves have around eight to twelve main lateral veins on either side of their central vein.

The foliage is particularly distinctive because the blades are firm, leathery and glabrous—that is, essentially without visible hairs. The upper surface is a rich, often glossy dark green; the underside is lighter and duller. The veins below can be subtly mottled with white. The pairing, tough texture, colour difference and narrow outline give the plant a recognisable appearance even when it is not flowering.

These traits also suit its forest setting. The branches spread through shaded space under neighbouring vegetation, with leaves arranged to receive filtered light. It is not described as a true climbing vine; rather, it is a woody shrub whose slender branches may weave between surrounding plants. The combination of dark foliage and bright, pendent flowers is an important part of its identity.

Flowers & calyx

The flowers arise from the leaf joints, typically in groups of two to six, although a single flower is sometimes present. Each flower is held on a slender 15–30 mm stalk, generally curved downward so the blossom hangs. The stalk is not sharply bent at the tip, a detail botanists call non-geniculate. That posture is especially helpful in separating C. pereirae from several lookalike species with upright or abruptly kinked flower stalks.

The flower opens into a five-pointed star. The 2022 monograph records a corolla about 9–10 mm long and 8–19 mm across. The exterior is white, sometimes carrying greenish-yellow markings near the base. Inside, the white petals are decorated with greenish-yellow and purple to reddish-brown patches. Some flowers have sharply outlined colour bands, while others show pale, broken patches. A few recorded flowers have no purple marks at all.

That variation matters. The species is not defined by a single fixed flower pattern: within the same broad region, researchers have observed flowers that look strikingly different in photographs. The strongest way to recognise it is to consider the flower colour together with the leaf texture, downward flower stalk and calyx.

Behind each blossom is a shallow, green, cup-shaped calyx, generally 1.5–2 mm long. Its rim is nearly smooth. There may be five tiny tooth-like projections, each less than 0.5 mm, but these are often effectively absent to the naked eye. The absence of prominent calyx teeth is central to the diagnosis: many other wild Brazilian peppers have five to ten long projections beneath their flowers.

The flower contains five stamens of similar length, with pale cream filaments and greenish-grey or dark green anthers. The style is about 4–6 mm long in typical flowers, ending in a small, pale-green stigma that sits only slightly beyond the anthers. Microscopic hairs occur along the calyx margin and inside the lower flower tube; the inner corolla carries a thin ring of glandular hairs. These minute structures were documented in the original drawing and later comprehensive treatment.

Fruit, heat & seeds

The fruit is a small, almost round berry generally measuring 8–10 mm across, with some as small as 6 mm. Young berries are green. As they mature, they become greenish-golden yellow, sometimes appearing more yellow under strong light. The colour is unlike the usual bright-red mature fruit of many wild or cultivated peppers. Ripe berries hang from stalks commonly around 23–28 mm long, and the fruit eventually detaches.

In the formal botanical treatments, the berry is pungent. The 2005 description used the phrase scarcely hot, while some later field observations by PepperFriends report stronger heat in tasted fruit. These are descriptions rather than a standardised laboratory measurement, so the supported conclusion is that the fruit contains heat, but a dependable SHU range has not been established.

The fruit wall is relatively thin and translucent. Its internal anatomy includes markedly enlarged cells within the fleshy middle layer, a feature illustrated in the original scientific drawing. The 2022 monograph states that the fruit lacks hard stone cells, another characteristic used when comparing wild peppers. When ripe, the small berry may fall from its stalk fairly quickly, which helps explain why some observers find the plant more often in flower than in fruit.

One berry usually contains about 5–20 seeds, though fruits with as few as three have been recorded. The seeds are unusually substantial relative to the berry: typically 3–3.7 mm long and 2.5–3.4 mm wide, almost round or slightly teardrop-shaped. They are brownish-black to black, not the cream-coloured seeds familiar from most cultivated chillies. Their thick coat has a patterned surface, with tiny raised structures near the margins that become clear under magnification.

These dark, relatively large seeds tie C. pereirae to several other Atlantic Forest wild peppers and are especially useful when a preserved specimen has lost its flower colour. Taken with the smooth calyx and golden-green fruit, the seeds help confirm an identification that would be difficult from a loose leaf or berry alone.

Range & habitat

Capsicum pereirae is a native of Brazil's Atlantic Forest (Mata Atlântica). The 2005 description listed Espírito Santo and Minas Gerais; the 2022 monograph recognises collections from Bahia and São Paulo as well. These localities stretch along eastern Brazil and into nearby mountain areas, but they do not imply that the species forms a continuous population across that entire region. It is associated with pockets of suitable forest habitat.

The most typical vegetation is humid, dense evergreen forest, called Floresta Ombrófila Densa in Brazilian vegetation classifications. Records span about 500 to 1,650 metres above sea level. The original description focused mainly on wetter mountain forests from about 1,000–1,600 metres; the wider range in the later study reflects a larger set of known specimens.

Botanists have found the plant in shaded forest interiors and edges, in damp hollows, along more fertile valleys, and in forest patches surrounded by high-elevation grassland. Early collections mention vegetation with palms and tree ferns. It is not necessarily a species of open, permanently flooded ground; its most consistent association is with sheltered moisture and forest shade.

A particularly unusual habitat occurs in the Parque Estadual do Ibitipoca in Minas Gerais. There, some plants grow close to wet caves and rock shelters in a moist, low-stature cloud-forest formation sometimes called Nanofloresta Nebular or Mata de Grota. Water, topography and dense vegetation help create a humid refuge within a wider landscape that can be relatively exposed or dry. This explains why observations from a small shaded grotto cannot automatically be applied to every population of the species.

Herbarium records indicate flowering from late October through March, with fruiting from February to May. These are seasonal observations from Brazilian collection sites rather than a guaranteed schedule in every year. Rainfall, elevation and the conditions of particular valleys and grottoes may shift the timing.

Field observations from Ibitipoca

The botanical record is complemented by field observations from Italian pepper researcher and photographer Claudio dal Zovo, associated with Associazione PepperFriends. His account describes the species in two small, exceptionally humid, shaded hollows within Ibitipoca State Park. Water emerging near rocks produces cool local conditions, despite the more open landscape around them. He reported roughly twenty plants in each of the two observed grottoes. Those numbers refer to those particular sites at the time of his observations, not to the species' total population across Brazil.

Dal Zovo also recorded the effect of these conditions on the plant's appearance. In heavy shade, the shrubs had long, slender branches, large dark leaves and flowers that could be examined close to eye level along the horizontal growth. The flower colour ranged from strongly patterned to lightly marked, matching the variation described by botanists. His photographs show how much the flower's colours can change in appearance depending on whether it is viewed face-on or from behind.

He reported seeing relatively few mature berries. He suggested possible explanations, including difficulty setting fruit, rapid dropping of ripe berries or removal by small mammals. These are field hypotheses, not demonstrated dispersal mechanisms. The botanical monograph does confirm that mature berries are deciduous, making quick fruit drop a reasonable part of the explanation, but no particular animal disperser is established by these observations.

The PepperFriends account also describes an unsuccessful attempt to relocate the species around the historically known Castelo area, where agriculture had changed the landscape. That survey is a useful local warning, but failure to find it at a former site does not prove extinction there or contradict the later 2022 range compiled from multiple specimens.

A 2014 Field Museum rapid colour guide, using Dal Zovo's photographs, separately highlights the humid-grotto habitat, hanging spotted flowers, toothless calyx and large seeds. Together, the field account and scientific monograph present a more complete portrait: a species that can occupy several Atlantic Forest regions but is sometimes found in very small, unusual microhabitats.

See the original PepperFriends field photographs and observations and Field Museum rapid colour guide (2014). These third-party photographs are linked rather than reproduced here.

Chromosomes & botanical research

Chromosome studies have counted 26 chromosomes (2n = 2x = 26) in Capsicum pereirae, corresponding to thirteen pairs. The count was published in research by Pozzobon and colleagues in 2006 and discussed in later comparative chromosome studies. This is significant because the widely grown species of chilli generally have 24 chromosomes. Several Atlantic Forest and Andean wild peppers instead possess 26, reflecting a deeper and more complicated evolutionary history within Capsicum.

The 2022 monograph places C. pereirae in the Atlantic Forest clade, an evolutionary group that also includes C. mirabile, C. schottianum, C. cornutum, C. hunzikerianum and other eastern Brazilian species. Research comparing chromosomes has found that many members of this group have unusually complex arrangements of densely packed chromosomal DNA. Such patterns help separate this branch from the cultivated-pepper groups even when individual flowers or berries look deceptively similar.

The genetic classification has not always followed earlier appearance-based ideas. In 2005, the original authors compared C. pereirae with both C. schottianum and C. flexuosum because of their hanging flowers and small or absent calyx teeth. Later genetic studies place C. flexuosum in a separate Flexuosum clade, illustrating why a shared flower shape does not necessarily mean two species are among one another's nearest living relatives.

A 2016 DNA study helped establish the broader clades recognised in the 2022 monograph. A further 2021 study used variation in a region of ribosomal DNA, the 5S non-transcribed spacer, to study relationships within the genus. Its authors found the Atlantic Forest species formed a recognisable group, although the exact branching relationships among them were harder to resolve. They suggested that comparatively rapid diversification could help explain those close, difficult-to-separate branches.

This species also illustrates the importance of studying fruit and seed structure alongside DNA. The giant cells inside its berry wall, the absence of stone cells, the thick dark seed coat and the persistent but nearly toothless calyx form a combination that can be compared with preserved specimens. These characters are particularly valuable for a wild pepper not widely available as commercial growing material.

Identification & related species

Several Atlantic Forest peppers carry white flowers with coloured markings, and some also produce yellow-green berries with dark seeds. For this reason, identifying C. pereirae from a flower photograph alone can be misleading. Its best combination is leathery, nearly hairless paired leaves; curved hanging flower stalks without a sharp elbow; a nearly toothless calyx; patterned white flowers; and golden-green ripe berries containing black seeds.

Compared with Capsicum schottianum

These species can both have a nearly toothless calyx and white flowers marked with purple and green. C. schottianum, however, is generally hairier, with thinner, more flexible leaves. Its flowering stalk usually develops a noticeable bend, unlike the smooth downward curve of C. pereirae. The 2022 monograph specifically highlights hairiness, leaf consistency and flower-stalk shape as the best differences.

Compared with Capsicum mirabile

C. mirabile is another eastern Brazilian pepper with purple-and-white flowers and yellowish berries. The important difference is the calyx: C. mirabile usually carries five conspicuous projections, whereas those of C. pereirae are absent or minute. The leaves of C. mirabile are also generally thinner and less leathery, and its flowering stalks are often bent more sharply.

Compared with Capsicum hunzikerianum

Both plants may have almost completely hairless stems and tough leaves, but C. hunzikerianum has a much more conspicuous calyx with usually five and sometimes more long teeth. Its flowers also tend to be larger, and its fruit stalks are longer. The two species occupy different specialised settings within the Atlantic Forest, so the location can provide supporting context, but the flower and calyx remain more reliable identification characters.

Compared with Capsicum campylopodium

The 2022 identification key pairs C. pereirae with C. campylopodium because their calyces lack conspicuous teeth. C. campylopodium has thinner leaves, flowers on shorter, erect and sharply bent stalks, and a smaller corolla. Its berries typically contain only four seeds, whereas C. pereirae can produce up to twenty.

The earlier description also noted a resemblance to C. flexuosum because of the drooping flower stalk and smooth calyx. Modern evolutionary studies distinguish their lineages. In practice, a careful identification should use the whole flowering branch, the calyx at flowering and fruiting, and the seed colour, not a single isolated feature.

Conservation

In its major 2022 monograph, Barboza and colleagues assigned C. pereirae a preliminary Least Concern (LC) assessment. Their analysis calculated an extent of occurrence of about 271,640 km² and an area of occupancy of 92 km². These are geographic mapping measures, not a count of plants. The authors also found records from more than ten localities, with many located in protected areas.

The protected sites noted in that assessment include Parque Nacional de Boa Nova and RPPN Palmeira in Bahia; Estação Biológica de Santa Lúcia in Espírito Santo; and Parque Estadual do Ibitipoca, APA Felício and RPPN Loredano Aleixo in Minas Gerais. Those protected localities helped support the authors' assessment, but they did not eliminate concerns about populations outside reserves.

The species remains closely associated with the Atlantic Forest, a biome that has been greatly altered and fragmented by agriculture, settlements and other land uses. Local habitat can be much more restricted than the species' full map suggests, especially where plants depend on sheltered, wet forest patches. The field observations from Ibitipoca document small groups of individuals in very specific moist grottoes, while the original Castelo collecting region has undergone substantial landscape change.

There is also a distinction between field assessments and statistical predictions. Kew's Plants of the World Online includes a 2024 model-based prediction that classifies the species as potentially threatened. That prediction does not cancel the 2022 botanists' preliminary Least Concern assessment; the two use different methods and evidence. Neither should be presented here as a separately verified official IUCN Red List listing.

The best reading of the available evidence is that C. pereirae has a broader known range and more protected populations than the earliest field accounts suggested, while still depending on forest habitat that can disappear locally. The preservation of herbarium specimens, protection of intact Atlantic Forest and monitoring of shaded wet sites all matter for keeping this unusual member of the pepper genus in the wild.