Pilosocereus armatus

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Pilosocereus armatus
Pilosocereus royenii 1.JPG
In Guánica State Forest, Puerto Rico
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Genus: Pilosocereus
Species:
P. armatus
Binomial name
Pilosocereus armatus
(Otto ex Pfeiff.) A.R.Franck [1]
Synonyms [1]
List
  • Cactus fimbriatusDescourt., nom. illeg.
  • Cactus fulvispinosusSpreng.
  • Cactus haworthii(DC.) Spreng.
  • Cactus niger(Salm-Dyck) Spreng.
  • Cactus strictusWilld., nom. illeg.
  • Cephalocereus nobilis var. nigricansBorg
  • Cephalocereus nobilis(Haw.) Britton & Rose
  • Cephalocereus nobilis f. cristatusP.V.Heath
  • Cephalocereus royenii f. cristatusP.V.Heath
  • Cephalocereus strictus(Link & Otto) Borg
  • Cereus armatusOtto ex Pfeiff.
  • Cereus barbadensisA.Berger
  • Cereus floccosusOtto ex Pfeiff.
  • Cereus fouachianus(F.A.C.Weber) Vaupel
  • Cereus fulvispinosusHaw.
  • Cereus fulvispinusSalm-Dyck, sphalm.
  • Cereus gloriosusPfeiff.
  • Cereus haworthiiDC.
  • Cereus leiocarpusBello
  • Cereus lutescensSalm-Dyck ex Pfeiff.
  • Cereus mollisPfeiff.
  • Cereus nigerSalm-Dyck
  • Cereus nigricansJ.Forbes
  • Cereus nigricansLem., nom. illeg.
  • Cereus nobilisHaw.
  • Cereus pfeifferiJ.Parm. ex Pfeiff.
  • Cereus polyptychusLem.
  • Cereus royenii var. armatus(Otto ex Pfeiff.) Salm-Dyck ex Walp.
  • Cereus royenii var. floccosusMonv. ex Labour.
  • Cereus strictusLink & Otto
  • Cereus trichacanthusSalm-Dyck
  • Pilocereus barbadensisA.Berger
  • Pilocereus floccosus(Otto ex Pfeiff.) Lem.
  • Pilocereus fouachianusF.A.C.Weber
  • Pilocereus fulvispinosus(Haw.) K.Schum.
  • Pilocereus haworthii(DC.) Console
  • Pilocereus lutescens(Salm-Dyck ex Pfeiff.) C.F.Först. & Rümpler
  • Pilocereus niger(Salm-Dyck) Poit.
  • Pilocereus nigricans(J.Forbes) Sencke ex Lem.
  • Pilocereus nobilis(Haw.) A.Berger
  • Pilocereus polyptychus(Lem.) Rümpler
  • Pilocereus royenii var. armatusRümpler
  • Pilocereus strictus(Link & Otto) C.F.Först. & Rümpler
  • Pilocereus trichacantusC.F.Först. & Rümpler
  • Pilosocereus nobilis(Haw.) Byles & G.D.Rowley
  • Pseudopilocereus nobilis(Haw.) Buxb.

Pilosocereus armatus is a species of flowering plant in the cactus family Cactaceae, native to the Virgin Islands and Puerto Rico. [1] It was first described by Christoph Friedrich Otto in 1837 as Cereus armatus, and transferred to the genus Pilosocereus in 2021. [2] It has been treated as Pilosocereus royenii, [3] and Pilocereus royenii var. armatus is among its many synonyms. [1] However, P. royenii is a name without a clear application. [4]

Contents

Description

Pilosocereus armatus has bluish green stems with 7–11 ribs. Its branches are usually upright. Areoles have spines up to 6 cm (2.4 in) long and silky hairs up to 4 cm (1.6 in) long. Non-flowering areoles have fewer hairs. The flower is 5–7 cm (2.0–2.8 in) long. The inner perianth segments are pinkish, the outer ones pinkish to pale green. The fruit is red. [3]

Taxonomy

There has been considerable confusion over the correct name for a species of the genus Pilosocereus found in Puerto Rico and the Virgin Islands. Sources have used Pilosocereus royenii, a name based on Linnaeus' Cactus royenii. However, the original description of C. royenii does not make clear its origin and precise identification. [3] [4] In 2019, an attempt was made to validate C. royenii by designating a neotype. [3] This did not succeed because it did not take into account the earlier designation of a different neotype in 2013, which also failed to make clear its origin and precise identification. The earliest available basionym is Cereus armatus; hence as of June 2025, the accepted name was Pilosocereus armatus. [4] [1]

Distribution

Pilosocereus armatus is native to Puerto Rico and the Virgin Islands. [1] [3]

References

  1. 1 2 3 4 5 6 "Pilosocereus armatus (Otto ex Pfeiff.) A.R.Franck", Plants of the World Online , Royal Botanic Gardens, Kew , retrieved 2025-06-06
  2. ↑ "Pilosocereus armatus (Otto ex Pfeiff.) A.R.Franck", The International Plant Names Index , retrieved 2025-06-06
  3. 1 2 3 4 5 Franck, Alan R.; Barrios, Duniel; Campbell, Keron C. St. E.; Lange, James; Peguero, Brígido; Santiago-Valentín, Eugenio; Rigerszki, Zoltán; Haakonsson, Jane; Gann, George D.; Cinea, William; Howe, Natalie M. M.; St. John, James; Moreno, Juan Sebastián & Clark, Cynthia A. (2019), "Revision of Pilosocereus (Cactaceae) in the Caribbean and northern Andean region", Phytotaxa, 411 (3): 129–182, Bibcode:2019Phytx.411..129F, doi:10.11646/phytotaxa.411.3.1
  4. 1 2 3 Korotkova, Nadja; Aquino, David; Arias, Salvador; Eggli, Urs; Franck, Alan; Gómez-Hinostrosa, Carlos; Guerrero, Pablo C.; Hernández, Héctor M.; Kohlbecker, Andreas; Köhler, Matias; Luther, Katja; Majure, Lucas C.; Müller, Andreas; Metzing, Detlev; Nyffeler, Reto; Sánchez, Daniel; Schlumpberger, Boris & Berendsohn, Walter G. (2021), "Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family", Willdenowia, 51 (2): 251–270, Bibcode:2021Willd..5151208K, doi:10.3372/wi.51.51208 , p. 264


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