Arrojadoa

Life-forms

Classification System: APG IV

Superregnum: Eukaryota
Cladus: Orthokaryota
Cladus: Neokaryota
Cladus: Photokaryota
Cladus: Diaphoretickes
Cladus: CAM
Cladus: Archaeplastida
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Ordo: Caryophyllales

Familia: Cactaceae
Subfamilia: Cactoideae
Tribus: Cereeae
Subtribus: Cereinae
Genus: Arrojadoa
Subgenera: A. subg. Albertbuiningia – A. subg. Arrojadoa
Species: A. × albiflora – A. bahiensis – A. dinae – A. eriocaulis – A. flava – A. leucostele – A. luetzelburgioides – A. marylaniae – A. multiflora – A. olsthoorniana – A. penicillata – A. pusilliflora – A. rhodantha – A. violaciflora
Name

Arrojadoa Britton & Rose (1920)

Type species: A. rhodantha (Gürke) Britton & Rose

Note

Arrojadoa: generic name that was given in honor of the Brazilian Miguel Arrojado Lisboa, superintendent of the Brazilian Railways at the time Britton and Rose described the genus in 1922
Synonyms

Arrojadoopsis Guiggi
Type: Arrojadoopsis marylaniae (Soares Filho & M.Machado) Guiggi
Pierrebraunia Esteves
Type: Pierrebraunia brauniorum (P.J.Braun & Esteves) Esteves

Distribution
Native distribution areas:

Continental: Southern America
Regional: Brazil
Brazil Northeast, Brazil Southeast, Brazil West-Central

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
References
Primary references

Britton, N.L. & Rose, J.N. 1920. The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family. Vol. 2. 239 pp. + 39 pl. Carnegie Institution of Washington. BHL PDF Reference page. : 2: 170.

Links

Govaerts, R. et al. 2021. Arrojadoa in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2021 Mar 31. Reference page.
Korotkova, N. et al. 2021. Arrojadoa in Cactaceae at Caryophyllales.org. A global synthesis of species diversity in the angiosperm order Caryophyllales. Published online. Accessed: 2021 Nov. 13. Reference page.
International Plant Names Index. 2021. Arrojadoa. Published online. Accessed: Mar 31 2021. Reference page.
Tropicos.org 2021. Arrojadoa. Missouri Botanical Garden. Published online. Accessed: 31 Mar 2021.
Hassler, M. 2021. Arrojadoa. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2021. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: 2021 Mar 31. Reference page.

Vernacular names
日本語: アロヤドア属

Arrojadoa is a genus of cacti, comprising 6 species and several varieties. It is named after the Brazilian botanist Miguel Arrojado Lisboa (1872–1932) who was superintendent of the Brazilian Railways at the time that Britton and Rose described the genus in 1920.[3] The genus occurs only in northern Brazil and is found at rocky places, under shrubs, which support their frail stalk. They are subtropical plants, with very little frost tolerance.
Description

The species often have frail stalks that can be upright or procumbent, reaching 2 m high and about 2 to 5 cm thick. There are from 10 to 15 ribs, and ramifications are rare, and usually occur from the base.

The flowers are nocturnal and tube-like, measuring 1 to 3 cm in length and 0.5 to 1 cm in diameter. Flower colors can be pink or carmine. The fruit is berry-like, spherical with a maximal diameter of 1.5 cm, and pink or red when ripe.
Species

As of September 2023, Plants of the World Online accepted the following species:[1]

Image	Scientific name	Distribution
	Arrojadoa albiflora	Brazil
	Arrojadoa bahiensis	Brazil
	Arrojadoa dinae	Brazil
	Arrojadoa eriocaulis Buining & Brederoo	Northern Minas Gerais – Brazil
	Arrojadoa leucostele (Gürke) Anceschi & Magli	Eastern Brazil
	Arrojadoa marylanae	Bahia, Minas Gerais – Brazil
	Arrojadoa multiflora F.Ritter	Bahia – Brazil
	Arrojadoa olsthoorniana Hofacker, M.Machado & R.Pontes	south Bahia – Brazil
	Arrojadoa penicillata	Bahia – Brazil
	Arrojadoa rhodantha	Bahia, Minas Gerais, Piaui – Brazil

Cultivation

These tropical cacti are ideal for hanging baskets because of their snake like growth, but they are difficult to cultivate. They grow relatively rapidly in good conditions. Propagation is done more by seed than by cuttings. It grows best on slightly humid soil and with plenty of watering from spring to autumn. In winter it should be left without water and at a minimal temperature of 10 °C.[4]
References

"Arrojadoa Britton & Rose". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 29 September 2023.
Anderson 2001, p. 117
"On-line Guide to the positive identification of Members of the Cactus Family".

"Arrojadoa rhodantha".

Anderson, Edward F. (2001), The Cactus Family, Pentland, Oregon: Timber Press, ISBN 978-0-88192-498-5