Pepper taxonomy uses overlapping terms that confuse even experienced growers. This article breaks down species, landraces, cultivars, accessions, hybrids, and related categories—what each means, how they differ, and why it matters when you’re growing, breeding, or preserving peppers.

Quick Reference

  • Species = biological unit (e.g., C. annuum, C. chinense)
  • Cultivar = human-selected, stable named variety (written in single quotes)
  • Landrace = locally adapted, genetically diverse population from traditional seed saving
  • Hybrid (F1) = cross between two distinct parents; does not breed true
  • Accession = a preserved seed sample held by a genebank with a unique ID

Species

A species is a basic biological unit. In Capsicum, it refers to groups of plants that are genetically distinct, sometimes reproductively isolated, and adapted to specific ecological ranges. The five cultivated species are C. annuum (jalapeños, bells, cayenne), C. chinense (habanero, reaper, ghost), C. baccatum (aji types), C. frutescens (tabasco), and C. pubescens (rocoto). Beyond these, over 20 wild species exist—including C. chacoense, C. eximium, and C. galapagoense—each carrying unique traits valuable for breeding and conservation.

Subspecies and Botanical Varieties

Subspecies and botanical varieties are natural, genetic subdivisions within a species that arise through geographic or ecological isolation. They differ consistently from the main population. The classic example is C. annuum var. glabriusculum, the wild progenitor of domesticated annuum peppers.

Cultivars

Short for ‘cultivated variety,’ a cultivar is a human-selected, genetically stable line propagated for desirable traits like color, size, heat, or productivity. Examples include ‘Jalapeño M’, ‘Fatalii’, and ‘Pimento de Padron’. Cultivar names are always written in single quotes and are not italicized.

Landraces

Landraces are genetically diverse, locally adapted populations developed over generations through traditional seed-saving and open pollination. They reflect specific regional preferences and environmental conditions. Examples include ‘Chilhuacle Negro’, ‘Criollo de Morelos’, and ‘Chiltepin’—the last being semi-wild, typically gathered rather than planted.

Accessions

An accession is a stored sample of genetic material—usually seeds—maintained by a genebank, university, or breeding program. Each accession represents a specific population at a specific time and carries a unique identifier: CGN19198 (Netherlands genebank) or PI640749 (USDA) are examples. Accession data can include wild collections, heirlooms, breeding lines, or landraces.

Hybrids

A hybrid is the offspring of a cross between genetically distinct parents. F1 hybrids are bred for vigor, uniformity, and specific traits, but do not breed true from seed. ‘Jaloro’ (F1 yellow jalapeño) is a commercial example. Many superhot peppers are suspected natural hybrids of C. chinense × C. frutescens.

Crosses

A cross is any intentional mating between two parent plants. Crosses can be intraspecific (within the same species) or interspecific (between species). Bhut Jolokia (C. chinense × C. frutescens) is the most well-known interspecific example. Crosses may result in hybrids, breeding lines, or be used in F2–F5 selection programs.

Breeding Lines, Selections, and Strains

A breeding line is a partially stabilized population selected over generations for desirable traits. A selection is an individual plant chosen from a population for desirable characteristics. A strain is a variant within a cultivar or landrace, often regional or breeder-specific. ‘Scotch Bonnet (MOA Yellow strain)’ and ‘Red Savina’ (a selected strain of habanero) are practical examples.

Open-Pollinated vs. Hybrid

Open-pollinated (OP) plants produce true-to-type offspring if kept genetically isolated. Landraces and heirlooms are OP. Hybrid (F1) seeds are the first generation from two different parents and may not produce consistent offspring. OP seeds can be saved; hybrid seeds should not be unless you’re breeding further.

Heirlooms

Heirlooms are old, open-pollinated varieties passed down over multiple generations. Some are landraces; others are stabilized cultivars. They’re valued for flavor, history, and adaptability to local conditions.

Wild Peppers and Domestication

Wild Capsicum species tend to be small, hot, and bird-dispersed. Domesticated peppers have been selected for larger fruit, less bitterness, and higher productivity. Some varieties like ‘Chiltepin’ occupy the edge between wild and cultivated—gathered from wild stands but also grown in gardens.

A Real-World Hierarchy Example

Consider C. chinense as the species. Within it, ‘Scotch Bonnet (Jamaica)’ is a landrace. ‘Scotch Bonnet MOA Yellow’ is a cultivar derived from it. ‘MOA Yellow Select Line 3’ is a strain within that cultivar. CGN21500 is an accession from the original seed stock. A cross of ‘Scotch Bonnet MOA’ × ‘Reaper’ produces an F1 hybrid.

Summary Table

Term Type Created By Stable? Example
Species Biological Nature Yes C. baccatum
Subspecies Biological Nature Yes C. annuum var. glabriusculum
Landrace Cultural Traditional Farmers Genetically diverse Criollo de Morelos
Cultivar Agricultural Breeders Yes ‘Fatalii’
Hybrid (F1) Agricultural Breeders No (F2+) ‘Jaloro’
Cross Breeding Term Breeders Not yet ‘Lemon Drop’ × ‘Reaper’
Accession Conservation Genebanks N/A PI640749
Strain Informal Growers Maybe ‘MOA Yellow (Jamaica strain)’
Selection Breeding Breeder Individual ‘Red Savina’

Grower’s Takeaway

  • When you buy “seeds” online, check whether they’re a cultivar, landrace, or breeding line—it determines how true they grow from saved seed.
  • F1 hybrid seeds are not worth saving unless you want to start a selection project.
  • Accession numbers let you trace genetic origin through genebanks like the USDA GRIN or COMAV collections.
  • Landraces are genetically diverse by design—expect variation within a population, not uniformity.

Sources & Further Reading

  • Priest, C.T., and D.J. Austin. The Chile Pepper Almanac. Harambe Publishing, 2026. Amazon