Leuenbergeria bleo

Leuenbergeria bleo, formerly Pereskia bleo,[2] (rose cactus, leaf cactus) is a leafy cactus, native to the shady, moist forests of Central America, that grows to a woody, prickly shrub about 2 m tall with large, orange flowers resembling rose blossoms.

Leuenbergeria bleo
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Genus: Leuenbergeria
Species:
L. bleo
Binomial name
Leuenbergeria bleo
(Kunth) Lodé[2]
Synonyms[2]
  • Cactus bleo Kunth
  • Pereskia bleo (Kunth) DC.
  • Pereskia corrugata Cutak
  • Pereskia cruenta Pfeiff.
  • Pereskia panamensis F.A.C.Weber
  • Rhodocactus bleo (Kunth) F.M.Knuth
  • Rhodocactus corrugatus (Cutak) Backeb.
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Description

Leuenbergeria bleo grows as a shrub or small tree and reaches a height of 2 to 8 metres with trunks up to 15 centimetres in diameter. The olive-green to brownish grey branches are smooth. The leaves are arranged alternately on the branches and are distinctly stalked with petioles up to 3 centimetres long. The leaf blade is 6 to 20 centimetres long and 2 to 7 centimetres wide, elliptic to oblong or lanceolate in shape. The five nerved leaf blades have four to six, often fork-shaped, side lobes. The thorns are either parallel in bundles or spread widely out. Long thorns on the branches are up to five to ten millimetres long. Along the main shoots there are up to 40 spines per areole, each 2 centimetres long.

The flowers are arranged in terminal lateral inflorescences. The bare, bright red, scarlet, salmon pink and orange-red-pink flowers reach diameters of 4 to 6 centimeters.

The fruits are conical, truncated in the apex, ripening yellow. They are edible but sour tasting. They contain lenticular seeds with a relatively large surface area of 39.61 mm². The seeds are 7.81 mm long and 6.45 mm wide.[3]

Taxonomy

The first description of the species, as Cactus bleo, was in 1828 by Karl Sigismund Kunth.[4]

Distribution and habitat

Leuenbergeria bleo is found by rivers and streams in Panama and Colombia as well as in secondary forest, from sea level to altitudes of 1300 metres.

The Red List of Threatened Species of the IUCN lists the species as "Least Concern (LC)" or not at risk.[1]

  • Fruit
    Fruit
  • Seeds
    Seeds
  • Seedlings
    Seedlings

References
  1. Griffith, P.; Gann, G.D.; Nassar, J. (2017). "Pereskia bleo ". IUCN Red List of Threatened Species. IUCN. 2017: e.T152000A121574961. doi:10.2305/IUCN.UK.2017-3.RLTS.T152000A121574961.en.
  2. "Leuenbergeria bleo (Kunth) Lodé". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 27 May 2019.
  3. Martín-Gómez, J. J., Del Pozo, D. G., Tocino, Á., & Cervantes, E. (2021). Geometric Models for Seed Shape Description and Quantification in the Cactaceae. Plants, 10(11), 2546.
  4. Nova genera et species plantarum quas in peregrinatione ad plagam aequinoctialem orbis novi collegerunt, vol. 6, 1815–1825, pp. 69–70
  • Malek SN, Shin SK, Wahab NA and Yaacob H. "Cytotoxic components of Pereskia bleo (Kunth) DC. (Cactaceae) leaves", Molecules, 14(5):1713-24. 2009.
  • Charles A. Butterworth and Robert S. Wallace, "Molecular Phylogenetics of the Leafy Cactus Genus Pereskia (Cactaceae)", Systematic Botany 30(4):800-808. 2005.
  • Beat Ernst Leuenberger, "Pereskia, Maihuenia, and Blossfeldia —Taxonomic History, Updates, and Notes", Haseltonia 14 : 54-93. 2008.
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