Solanum aculeastrum

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Solanum aculeastrum
Solanum aculeastrum 3.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Solanales
Family: Solanaceae
Genus: Solanum
Species:
S. aculeastrum
Binomial name
Solanum aculeastrum
Synonyms

See text

Solanum aculeastrum is commonly known as soda apple, sodaapple nightshade, [1] goat apple, poison apple, or more ambiguously as " bitter-apple ". It is a poisonous nightshade species from Africa and only distantly related to true apples. The term "soda apple" probably derives from "Sodom apple", modified due to the fruit's detergent properties.

Contents

Description

It is a shrub or small tree native to tropical Africa south to South Africa, in a wide range of soil, terrain, and climatic conditions. It is highly branched and reaches 1–5 m high, with numerous sharp, hooked, brown thorns. The leaves are ovate, up to 15 cm long and 13 cm broad, with lobed margins and downy undersides. It flowers (in South Africa) from September to July, peaking from November to March. The petals are white to pale violet surrounding the ovary, the flower also has a bitter, sour smell. These yield to fruit from April to January, peaking in June and November. These smooth, round berries are 6 cm in diameter and fade from green to yellow as they ripen. These berries contain high levels of the poisonous alkaloid solanine. The species name aculeastrum refers to the thorns that adorn most parts of the shrub.

Uses

Because of its dense growth and prickly nature, soda apple is used as a hedge and living barrier for containing livestock. It is often used as a soap replacement, as it is high in saponin. Traditional Zulu practices use the fruit - fresh, boiled, or charred - in herbal medicine to treat a wide variety of afflictions, including cancer, toothaches, and ringworm.

Synonyms

The soda apple has been described under a range of junior synonyms, now invalid. Several of these are ambiguous homonyms: [2]

The S. dregei described by Dunal in de Candolle is now S. capense .
The Solanum saponaceum described by W.J. Hooker is the S. elaeagnifolium of Cavanilles.
Solanum saponaceum var. uruguense, described by Grisebach, is now S. bonariense .
Solanum subhastatum as described by L.B. Smith and Downs is now S. cylindricum .
Solanum spectabile var. subhastatum as described by Otto Sendtner in von Martius is the S. affine of Sendtner.

The botanist Bitter distinguished a number of subspecies and varieties of the soda apple, but these are not considered valid taxa anymore: [2]

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<i>Solanum nelsonii</i> Species of shrub

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<i>Solanum elaeagnifolium</i> Species of flowering plant

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<i>Solanum paniculatum</i> Species of flowering plant

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<i>Solanum lanceolatum</i> Species of flowering plant

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<i>Solanum tampicense</i> Species of flowering plant

Solanum tampicense, also known as wetland nightshade, aquatic soda apple, and scrambling nightshade, is a perennial in the Solanaceae or Nightshade Family. It can exist as a vine, tree, or shrub and is native to the West Indies and Central America. It is classified as a noxious weed by the United States Department of Agriculture and by several states and is known as an invasive species in the state of Florida.

References

  1. USDA, NRCS (n.d.). "Solanum aculeastrum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 16 November 2015.
  2. 1 2 Solanaceae Source [2008]: Solanum aculeastrum. Retrieved 2008-SEP-25.

Further reading