Editing Rosenbergiodendron formosum

{| class="wikitable" style="float: right; width: 320px; margin-left: 1.25em; margin-bottom: 1em;"
! colspan="2" style="background: #e8e8e8;" | Blackberry jam fruit (''Rosenbergiodendron formosum'')
|-
! Scientific name
| ''[[Rosenbergiodendron formosum]]''
|-
! Common names
| Blackberry jam fruit; Randia formosa
|-
! Genus
| [[Rosenbergiodendron]]
|-
! Family
| [[Rubiaceae]]
|-
! Order
| [[Gentianales]]
|-
! Native range
| Colombia, Ecuador, Panama and Venezuela
|-
! Habit
| Compact evergreen shrub
|-
! Light
| Full sun to partial shade
|-
! Soil
| Well-drained acidic soil
|-
! Propagation
| Seed
|}

''Rosenbergiodendron formosum'' is the accepted name for the blackberry jam fruit, with ''Randia formosa'' among its documented synonyms.<sup id="cite_ref-1">[[#cite_note-1|[1]]]</sup> GBIF places the species in Rubiaceae and returns an accepted species match with high matching confidence.<sup id="cite_ref-2">[[#cite_note-2|[2]]]</sup> Its native range is listed in Colombia, Ecuador, Panama and Venezuela; Trinidad and Tobago is listed as an introduced range.<sup>[[#cite_note-1|[1]]]</sup>

== Description ==
This is a compact evergreen shrub with fragrant, tubular white flowers.<sup id="cite_ref-3">[[#cite_note-3|[3]]]</sup> In cultivation it can be kept in a container, making it a useful candidate for growers who need to move a tropical fruit plant between protected and outdoor conditions.<sup>[[#cite_note-3|[3]]]</sup>

== Cultivation ==
=== Soil and water ===
Horticultural guidance places the plant in well-drained acidic soil and describes container growing for this compact shrub.<sup id="cite_ref-4">[[#cite_note-4|[4]]]</sup><sup>[[#cite_note-3|[3]]]</sup>

=== Sun and humidity ===
The available horticultural accounts describe full sun, bright light, or partial shade for this plant.<sup>[[#cite_note-3|[3]]]</sup><sup>[[#cite_note-4|[4]]]</sup>

=== Seasonal changes ===
The evergreen habit is associated with continued growth in warm conditions rather than a deciduous winter dormancy.<sup>[[#cite_note-3|[3]]]</sup> Flowering and fruit ripening may overlap, so a plant can carry flowers and developing yellow fruit during the same extended production period rather than offering only one sharply bounded crop window.<sup>[[#cite_note-3|[3]]]</sup>

== Propagation ==
Seed propagation is the documented method for this plant.<sup>[[#cite_note-3|[3]]]</sup> The same horticultural account places seed-to-fruit timing at about 1–1.5 years in its reported growing example; treat that interval as an account-level observation rather than a fixed schedule for every climate, container, or plant.<sup>[[#cite_note-3|[3]]]</sup>

== Flowering, fruiting, and harvest ==
The flowers are described as fragrant, tubular and white. A nocturnal-moth pollination association is also given, but that observation does not establish a universal pollinator requirement for cultivated plants.<sup>[[#cite_note-3|[3]]]</sup> Flowering and ripening can overlap, and the fruit is described as yellow when mature.<sup>[[#cite_note-3|[3]]]</sup>

A documented container-grown example, about 3 feet tall in a 3-gallon container, carried 25–30 fruits at a time.<sup>[[#cite_note-3|[3]]]</sup> That individual result is useful for judging the plant's potential in a container, but it is not a general yield expectation.

== Fruit and uses ==
The fruit has soft, sweet pulp described as resembling blackberry jam, which explains the common name.<sup>[[#cite_note-3|[3]]]</sup> Its distinguishing description is the soft pulp and jam-like flavor comparison; fruit size, storage life and preparation methods remain unresolved.

== Cultivars and selections ==
“Lady Fingers” is a nursery selection name attached to a long-fruited form described with fruit about 2 inches long and larger flowers.<sup id="cite_ref-5">[[#cite_note-5|[5]]]</sup> Use the name only as a nursery-selection label, without treating it as a formally released cultivar or assuming comparative data for flavor, yield, climate adaptation or propagation.

== References ==
* <span id="cite_note-1"></span>[[#cite_ref-1|↑]] '''[1]''' [https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:222508-2 Rosenbergiodendron formosum — Plants of the World Online].

* <span id="cite_note-2"></span>[[#cite_ref-2|↑]] '''[2]''' [https://api.gbif.org/v1/species/match?name=Rosenbergiodendron%20formosum Rosenbergiodendron formosum — GBIF species match].

* <span id="cite_note-3"></span>[[#cite_ref-3|↑]] '''[3]''' [https://www.growables.org/information/TropicalFruit/blackberryjam.htm Blackberry Jam Fruit, Randia formosa — Growables].

* <span id="cite_note-4"></span>[[#cite_ref-4|↑]] '''[4]''' [https://www.toptropicals.com/catalog/uid/randia_formosa.htm Randia formosa (Blackberry Jam Fruit) — Top Tropicals Plant Encyclopedia].

* <span id="cite_note-5"></span>[[#cite_ref-5|↑]] '''[5]''' [https://www.toptropicals.com/catalog/uid/randia_formosa.htm Randia formosa (Blackberry Jam Fruit), “Lady Fingers” selection — Top Tropicals Plant Encyclopedia].