Solanum diploconos
| Guave tamarillo (Solanum diploconos) | |
|---|---|
| Scientific name | Solanum diploconos [1] |
| Genus | Solanum [1] |
| Family | Solanaceae [1] |
| Order | Solanales [1] |
| Common names | Guave tamarillo; tomatinho-do-mato [2] |
| Growth form | Fast-growing evergreen shrub or small tree, about 1–4 m [2] |
| Native range | Argentina, Paraguay, and Brazil [2] |
| Fruit | Yellow to orange, fleshy fruit used raw or cooked [3][2] |
Solanum diploconos, known as guave tamarillo or tomatinho-do-mato, is a fast-growing evergreen shrub or small tree reported from Argentina, Paraguay, and Brazil. Its natural settings include Atlantic coastal rainforest and Araucaria-forest clearings and edges from about 50 to 1,000 m. [2]
Description[edit | edit source]
The plant is reported as 1–4 m tall, with shallow, spreading roots that are easily disturbed by surface hoeing. Fruits are fleshy and indehiscent. A Paraná study measured fruits 2.60–4.60 cm long and 2.20–3.10 cm in diameter; a broader species account gives a range of about 2–6 cm long and 2–3 cm in diameter. [2][3]
The accepted name is Solanum diploconos. Earlier combinations associated with the species include Cyphomandra diploconos, Pionandra diploconos, and Witheringia diploconos. [1][2]
The species has also been used as a parent in crosses with Solanum corymbiflorum; F1 and two BC1 hybrid types were reported in a breeding study. These are breeding materials rather than documented named cultivars of S. diploconos. [5]
Cultivation[edit | edit source]
In nature, Solanum diploconos occurs in humid forest margins and clearings. In cultivation it suits a sunny, sheltered position with fertile soil that drains freely, steady moisture during active growth, and protection from drought and strong wind. The practical account describes best fruiting under cool growing-season temperatures rather than in sustained heat. [2]
Soil and water[edit | edit source]
Use a light, fertile, well-drained soil and keep the root zone evenly supplied with moisture during active growth. The species is described as drought-sensitive, while its shallow spreading roots benefit from an organic mulch. Keep hoes and other cultivation tools away from the surface root zone so that the roots are not cut. [2]
Sun and humidity[edit | edit source]
A sunny position is associated with fruiting, but the plant should be sheltered from drying winds. Its native forest-edge and rainforest settings indicate a humid growing environment; combine strong light with reliable moisture and airflow rather than exposing a container or young plant to hot, desiccating wind. [2]
Seasonal changes[edit | edit source]
Fruit production is reported to be better during a cool growing season, with fruit ripening gradually. Reduce exposure to drought as the season becomes dry and protect the plant from wind; maintain light and drainage rather than keeping the root zone saturated. Fruit production is reported within about two years from seed, with peak production around three to four years, followed by degeneration after roughly eight years; these are reported growing patterns, not fixed plant lifespans. [2]
Propagation[edit | edit source]
Seeds show epigeal, phanerocotylar germination. A practical propagation account describes emergence in about four weeks at 15 °C or about two weeks at 25 °C, while a Paraná study documents seedling development under nursery conditions. The same account lists greenwood cuttings as an alternative method. [3][2]
After 120 days, seedlings in the Paraná study averaged six leaves, 4.68 mm stem diameter, and 23.66 cm height. Those values describe that study's material and conditions, not a universal nursery target. [3]
Flowering, fruiting, and harvest[edit | edit source]
The flowers are described as insect-pollinated and non-self-fertile, so fruit set is expected to benefit from compatible plants and insect activity rather than from relying on a single isolated plant. Fruit production is associated with a cool growing season, and ripening is gradual. [2]
Harvest fruit as it develops its yellow-to-orange color and reaches the gradual-ripe stage described for the species. Reported production begins within about two years from seed, with peak production around three to four years in the practical account. [2]
Fruit and uses[edit | edit source]
The fruit is reported as somewhat acidic, with a flavor compared with tree tomato and guava. It can be eaten raw or cooked; drying is described as improving the texture and producing a sour, tamarind-like flavor. [4][2]
A 2016 laboratory analysis identified phenolic compounds and carotenoids in different fruit parts and measured in-vitro reactive-oxygen- and reactive-nitrogen-species scavenging by a whole-fruit extract. These assays describe chemical composition and test-tube activity, not proven dietary, therapeutic, or medical effects. [4]
A conservative food-use approach is to use only fully ripe fruit. A practical species account warns that unripe fruit is slightly toxic; the warning does not establish a dose or mechanism. A separate fruit-extract paper that made anti-inflammatory and healing claims was retracted in 2026 and should not be used to support medicinal use. [6][2]
References[edit | edit source]
- ↑ [1] GBIF species match: Solanum diploconos. Accepted name, species rank, genus, family, and taxonomic match; accessed 2026-09-29.
- ↑ [2] Solanum diploconos - Useful Tropical Plants. Common names, synonyms, range, habitat, growth form, cultivation, pollination, fruiting, propagation, fruit use, and unripe-fruit caution; secondary synthesis; accessed 2026-09-29.
- ↑ [3] Análise morfológica, biométrica e de fases de desenvolvimento: Solanum diploconos. Original Paraná morphology, phenology, fruit and seed measurements, germination type, and 120-day seedling results; abstract-level access; accessed 2026-09-29.
- ↑ [4] Solanum diploconos fruits: profile of bioactive compounds and in vitro antioxidant capacity of different parts of the fruit. Original 2016 laboratory analysis of fruit compounds and in-vitro assays; abstract-level access; accessed 2026-09-29.
- ↑ [5] Hybrids of Solanum corymbiflorum and S. diploconos (Solanaceae) – a hope for new commercial varieties of edible fruits. Original hybridization report describing F1 and BC1 types and breeding intent; it does not document a named released cultivar; accessed 2026-09-29.
- ↑ [6] RETRACTION: Anti-Inflammatory and Healing Activity of the Hydroalcoholic Fruit Extract of Solanum diploconos. PubMed retraction record for the 2021 extract paper; medicinal claims from the retracted study are excluded; accessed 2026-09-29.