Thelocactus conothelos

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Thelocactus conothelos
Thelocactus conothelos 01.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Genus: Thelocactus
Species:
T. conothelos
Binomial name
Thelocactus conothelos
(Regel & Klein) Backeb. & F.M.Knuth
Synonyms
  • Echinocactus conothelosRegel & E.Klein bis 1860
  • Gymnocactus conothelos(Regel & E.Klein bis) Backeb. 1961
  • Torreycactus conothelos(Regel & E.Klein bis) Doweld 1998

Thelocactus conothelos is a species of cactus endemic to Mexico. [1]

Contents

Description

Thelocactus conothelos is a solitary, spherical cactus, growing 7 to 18 cm (2.8 to 7.1 in) in height and diameter. Its ribs are indistinct, with conical warts that are light green at the base and squared. The areoles are woolly and about 3 mm (0.12 in) wide. It has 7 to 20 glassy, ocher yellow to grayish radial spines, 8 to 12 mm (0.31 to 0.47 in) long, and 4 central spines that are 1 to 9 cm (0.39 to 3.54 in) long. The large, spreading flowers range from 4.5 to 6 cm (1.8 to 2.4 in) wide and vary in color from white to magenta. Fruits are 12 mm (0.47 in) long and 7 mm (0.28 in) in diameter, with dark reddish to black seeds. [2]

Subspecies

Accepted subspecies: [1]

ImageScientific nameDistribution
Thelocactus conothelos argenteus 02.JPG Thelocactus conothelos subsp. argenteus(Glass & R.A.Foster) GlassMexico (Nuevo León)
Thelocactus conothelos ssp aurantiacus 01.jpg Thelocactus conothelos subsp. aurantiacus(Glass & R.A.Foster) GlassNE. Mexico
Thelocactus conothelos (5761507717).jpg Thelocactus conothelos subsp. conothelosNE. Mexico
Thelocactus garciae.jpg Thelocactus conothelos subsp. garciae(Glass & Mend.-Garc.) Mosco & Zanov.Mexico (Tamaulipas)

Distribution

This species is native to Tamaulipas, Nuevo León, and San Luis Potosí, Mexico at elevations between 1200 and 2200 meters growing in shrubland and limestone slopes. Plants are found growing along Mammillaria candida , Mammillaria picta , Mammillaria formosa subsp. formosa, Mammillaria winterae , Turbinicarpus schmiedickeanus subsp. gracilis, Thelocactus bicolor , Astrophytum myriostigma and Echinocactus platyacanthus [3]

Taxonomy

It was first described as Echinocactus conothelos in 1860 by Eduard von Regel and Edward Klein. [4] The name, derived from Greek, refers to the cone-shaped warts. In 1936, Frederik Marcus Knuth reclassified it as Thelocactus.

References

  1. 1 2 "Thelocactus conothelos (Regel & E.Klein bis) F.M.Knuth". Plants of the World Online. Retrieved 2024-09-16.
  2. ↑ Anderson, Edward F. (2001). The Cactus Family. Portland, Or: Timber Press (OR). p. 658. ISBN   0-88192-498-9.
  3. ↑ "Thelocactus conothelos". LLIFLE. 2013-08-04. Retrieved 2024-09-17. Creative Commons by-sa small.svg  This article incorporates textfrom this source, which is available under the CC BY-SA 3.0 license.
  4. ↑ Avé-Lallemant, Julius Leopold Eduard; Fischer, F. E. L.; Herder, Ferdinand Gottfried von.; Meyer, Carl Anton; Regel, E.; Trautvetter, Ernst Rudolph von (1845). "Index seminum, quae Hortus Botanicus Imperialis Petropolitanus pro mutua commutatione offert". Hortus. Retrieved 2024-09-17.
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