Capsicum lycianthoides

Overview

Capsicum lycianthoides is a wild member of the pepper genus native to Colombia and Ecuador. Rather than a low-growing garden chilli, it is generally a slender, branching forest shrub, sometimes climbing or scrambling through surrounding plants. It lives in humid Andean forests and is recognised by its paired leaves, their conspicuously different sizes, and unusually large yellow flowers.

The berries start white or light green and mature to bright orange or red. Although they resemble miniature chillies, the 2022 botanical monograph describes them as non-pungent. The fruits have dark, almost black seeds, another feature that separates many Andean wild peppers from the familiar domesticated varieties with pale seeds.

It is especially interesting because its distinct identity was overlooked in much of the modern scientific literature. For years, botanical collections of this species were often called Capsicum geminifolium. Later comparisons of flowers, foliage and genetic evidence showed that these are two separate species.

Scientific name

Capsicum lycianthoides Bitter

Family

Solanaceae

Native range

Colombia & Ecuador

Growth habit

Shrub or subshrub; 1–3 m typical

Earliest type collection

July 1860, Ecuador

First description

1921, by Georg Bitter

Flower

Yellow, sometimes purple or brown-marked

Mature fruit

Orange or red; 7–12 mm

Pungency

Non-pungent

Chromosomes

2n = 26

Habitat

Tropical montane rainforest

Conservation

Preliminary Least Concern (2022)

Discovery & naming

The scientific story begins with a preserved specimen gathered by the British botanist Richard Spruce in July 1860 in Ecuador's Chimborazo region, at a place recorded on the specimen as Chasuán. That nineteenth-century collection became the name-bearing reference for the species. The primary specimen is preserved in the herbarium at Vienna (W), with related material documented at Kew and Córdoba.

The German botanist Georg Bitter formally published Capsicum lycianthoides in 1921, in volume 17 of Repertorium Specierum Novarum Regni Vegetabilis, page 332. His paper discussed the boundaries between Solanum, Capsicum and Lycianthes, part of a long-running effort to organise closely related plants in the nightshade family.

The name lycianthoides means resembling Lycianthes. This is fitting in the context of Bitter's work: Lycianthes is a separate but closely related genus in the same family. Despite that reference, C. lycianthoides is a true Capsicum, not a species of Lycianthes.

The long-running identity mix-up

For much of the twentieth century and into the 2000s, botanists routinely confused C. lycianthoides with C. geminifolium. Both are forest peppers from the northern Andes, both carry hanging yellow flowers, and both produce small non-pungent berries that can ripen orange or red. Dried herbarium specimens make the overlap even more difficult to untangle.

The confusion was reinforced by influential work by Armando T. Hunziker. When he described Capsicum scolnikianum in 1961, he discussed flower shapes in a way that later workers concluded referred to plants actually belonging to C. lycianthoides, while applying the name C. geminifolium. Hunziker's later treatment did not recognise C. lycianthoides as a separate accepted species.

As a result, older publications sometimes listed C. geminifolium and C. scolnikianum separately but omitted C. lycianthoides. A 2019 taxonomic overview treated C. scolnikianum as a synonym of C. geminifolium while accepting C. lycianthoides as distinct. Genetic research and the detailed 2022 morphological revision supported this interpretation.

Importantly, Capsicum scolnikianum is not another name for C. lycianthoides. It belongs with C. geminifolium. The story is one of misidentification and changing interpretation, not simply one species being renamed.

Plant, stems & foliage

Typical plants grow as slender shrubs or subshrubs roughly 1–3 metres high, occasionally reaching 4 metres or remaining as small as half a metre. The branches are few to moderately numerous and often spread in a zig-zag pattern as one growing shoot takes over from another. Some plants grow upright, while others lean or scramble over neighbouring vegetation.

Young stems can be dark green or purple. They are flexible, somewhat angular and almost entirely smooth, apart from occasional short, forward-pointing hairs on new growth. Older stems turn brown and remain largely hairless. The detailed 2022 description notes an absence of conspicuous lenticels on the older bark.

One of the most useful features is the strongly unequal pair of leaves at each flowering unit. The larger leaf is usually 11–22.5 cm long and 4–8.5 cm wide, broadly egg-shaped with a pointed tip. Small exceptions occur beyond those usual proportions. The companion leaf is much smaller, often only 2.5–5.5 cm long, and can be almost round. Its stalk is very short or absent.

Unlike the thin, narrow foliage of C. geminifolium, the main leaves here have a firm, leathery texture. Their upper surfaces are dark green. Underneath, they may be pale green, purple or green with purple spots. The edges are smooth, the leaf bases often slightly uneven, and seven to ten main lateral veins can run along each side of the centre vein of a large leaf.

Most of the leaf surface is hairless. This combination of broad, stiff, glossy-looking major leaves, much smaller companion leaves and nearly hairless stems gives the plant a recognisable outline even when it is not flowering.

Flowers & the horned calyx

Flowers develop in clusters in the leaf axils. A cluster normally carries three to eight flowers, with records extending from two to ten. The thin flower stalks are around 8–15 mm long and curve downward. Old flowering points leave noticeable, corky scars, which may be visible on branches bearing many generations of blossoms.

The flowers are quite showy for a wild pepper. Each is approximately 15–18 mm wide and 8–15 mm long. Instead of spreading flat like a simple star, the corolla forms a wide bell with a five-sided, nearly pentagonal outline. The petal lobes are shallow, joined by a broad membrane, so the flower looks like a little flared cup rather than five separate pointed petals.

Colour varies considerably. Some flowers are clear yellow; others have a purple star in the centre or dark brown spots on both the inner and outer surfaces. Yellow and purple buds may appear together. Five stamens sit inside the flower, with whitish, yellow or pale-brown anthers. Their filaments are sometimes of two different lengths. The pale style usually reaches a little beyond the anthers.

Behind the corolla is the calyx, a small green or purplish cup roughly 2–4 mm long. It usually bears three to five slender pointed projections, occasionally two, which can spread outward or point backward. Some look like tiny horns. They grow from just below the upper rim, and their length and orientation are important identification characters.

When flowering ends, the petals fall but the calyx persists. Its horn-like tips then become especially obvious around the base of the developing fruit. This is one reason photographs of both flowering and fruiting branches are useful for identifying the species.

Fruit, ripening & seeds

The fruits are small, rounded berries, usually 7–12 mm in diameter. Some are nearly spherical; others are slightly flattened from top to bottom. Immature berries may be white or pale green, then ripen to vivid orange or red. Mature fruit hangs from a curved stalk which can reach approximately 13–30 mm, generally longer than the stalk of the flower it developed from.

The 2022 monograph explicitly records the berries as non-pungent. They have a comparatively thick, opaque wall and lack the enlarged internal fruit-wall cells recorded in some other Capsicum. Some berries contain a few small, hard internal stone cells. Mature berries are deciduous, meaning they can detach naturally from their stalks.

The fruiting calyx remains beneath the berry, often purplish and about 5–6 mm wide. Its projections can become 3–6 mm long and bend backwards. On a ripe orange or red berry, these little purple-green horns form a particularly distinctive contrast.

Each fruit contains around 34–75 seeds, despite being only about a centimetre across. The seeds are small, approximately 1.5–1.8 mm long, teardrop-shaped and brownish-black to black. Under magnification, the seed coat has a fine net-like pattern. The embryo inside is curved in a ring, a structure described by the monograph as annular.

The combination of small orange-red berries, conspicuous calyx projections and many dark seeds is especially useful when the plant is encountered without flowers.

Range, habitat & flowering season

Capsicum lycianthoides is native to the northern Andes of Colombia and Ecuador. Documented Colombian records include Antioquia, Nariño, Quindío, Risaralda and Valle del Cauca. Ecuadorian collections extend across several mountain provinces, including Azuay, Chimborazo, Cotopaxi, El Oro, Loja, Napo, Pichincha and Zamora Chinchipe.

The species is a characteristic component of tropical montane rainforests, occurring in both primary and secondary forests. Plants have been observed in the forest interior and at forest margins, in shady conditions as well as sunnier openings. Its flexible, sometimes scrambling growth habit suits a complex environment of shrubs, tree trunks and competing understory vegetation.

Most documented sites fall between roughly 500 and 3,500 metres above sea level, with occasional collections as low as about 300 metres. This wide elevational range covers varied mountain conditions, from comparatively warm forests to cooler, cloud-influenced slopes.

Herbarium and field observations record flowers and fruit throughout the year. Rather than following a single short season, plants can be found at different reproductive stages in different localities and months. The 2022 monograph treats the species as relatively common in parts of its range and notes collections from protected lands.

Genetics & evolutionary relatives

Chromosome studies report 2n = 26 for Capsicum lycianthoides: thirteen pairs of chromosomes. This number also occurs in the other closely studied members of the wild Andean Capsicum lineage. Many familiar cultivated chilli lineages have 24 chromosomes instead, making chromosome number one useful piece of evidence in studying the history of the genus.

The Andean lineage includes species such as C. geminifolium, C. dimorphum, C. rhomboideum, C. lanceolatum, C. longifolium and C. piuranum. These are not simply unusual forms of cultivated hot peppers. They belong to a distinct evolutionary grouping containing numerous small-fruited, frequently non-pungent forest plants.

Research published in 2019 placed C. lycianthoides near other Andean species, including C. geminifolium and C. piuranum. A 2022 genome-wide DNA study again recovered an early-diverging Andean group containing C. lycianthoides. These independent lines of research help confirm that its similar appearance to C. geminifolium reflects genuine relationship rather than identical species status.

Comparative chromosome work also found similarities between C. lycianthoides and C. longifolium. The chromosome findings contribute to a broader understanding of how wild peppers from Andean forests differ from the groups that eventually gave rise to familiar cultivated chillies.

How to identify it

The best field clues are large, leathery, mostly hairless leaves with very small companion leaves; groups of hanging yellow flowers; a broad, five-sided corolla; and two to five pointed projections on the calyx. At fruiting time, the bright orange or red berries, dark seeds and recurved calyx projections reinforce the identification.

Compared with Capsicum geminifolium

This is the most important comparison because the two species were confused for so long. C. geminifolium usually has narrower, thinner and more noticeably hairy leaves, while C. lycianthoides has larger, broader, firmer leaves that are nearly hairless. Flower stalks are also helpful: typically 15–27 mm in C. geminifolium but only 8–15 mm in flowering C. lycianthoides.

The flower outline provides another reliable difference. In C. geminifolium, the yellow bell looks more star-shaped from the front. In C. lycianthoides, it looks wider and distinctly five-sided, with a broad membrane connecting the small petal lobes. Looking at the full set of characters is more dependable than using fruit colour alone.

Compared with other wild Andean peppers

Other species in the Andean group can share yellow flowers, small berries or unusual calyces, but few combine a large, firm ovate leaf with an almost round minor leaf, showy pentagonal yellow corollas and relatively short pendent flower stalks. Because several species overlap geographically, both fresh floral photographs and specimens showing mature fruit can be particularly valuable.

Conservation

The authors of the 2022 Capsicum monograph proposed a preliminary Least Concern (LC) assessment for C. lycianthoides. They estimated an extent of occurrence of approximately 224,148 km² and an area of occupancy of 492 km². Although the smaller occupancy measure individually falls within a more threatened numerical threshold, the authors considered the species' broad distribution, frequency of collections and presence in multiple protected areas when deciding on Least Concern.

This is the research team's published preliminary assessment, not a statement that the species has a separate formally verified IUCN Red List listing. It describes the evidence available in that 2022 treatment.

Because the plant is associated with humid Andean forests, protection of both intact and regenerating forest habitat remains relevant to its long-term survival. Old botanical specimens, recent collections and correctly labelled photographs are also important: the species' history shows how conservation records can be affected when two closely related plants are repeatedly confused.