Pachycereus

Pachycereus pringlei

Pachycereus is a genus in the cactus family ( Cactaceae ). The botanical name derives from the Greek adjective " παχύς " ( pachys ) for thick and refers to the vigorous shoots of the plants.

Description

The species of the genus Pachycereus grow like candelabra tree similar to shrubby and often enormous size with a height of up to 25 meters. The green to bluish - green, vigorous shoots are upright. However, they have no ribs warts. Areoles are from which there are no flowers with thorns, the remaining can be densely woolly and without thorns. The no less than 4 central spines are strong and 2-10 inches long. The 20 or more sharp spines are 2-7 inches long.

The small to medium sized flowers are short tubular, funnel-shaped or bell-shaped and open usually at night. The flower tube is scaly. The areoles of Perikarpell and flower tube are bare, woolly or bristly. The elongated fleshy fruits are densely covered with wool and bristles. They are up to 7.5 inches long and bursting irregularly. They contain large helmet-shaped, smooth, and shiny black seeds.

Systematics and distribution

Pachycereus is widespread in the southwestern United States and northern Mexico. The distribution area includes Baja California, Honduras and Guatemala one.

Alwin Berger presented Pachycereus 1905 as a subgenus of Cereus ( Cereus subg. Pachycereus ) on. Nathaniel Lord Britton and Joseph Nelson Rose raised the subgenus then in 1909 to the rank of genus. The type species of the genus Cereus pringlei.

Belong to the genus of the following types:

  • Pachycereus fulviceps
  • Pachycereus gatesii
  • Pachycereus gaumeri
  • Pachycereus grandis
  • Pachycereus hollianus
  • Pachycereus lepidanthus
  • Pachycereus marginatus
  • Pachycereus militaris
  • Pachycereus pecten - aboriginum
  • Pachycereus pringlei
  • Pachycereus schottii
  • Pachycereus tepamo
  • Pachycereus weberi

Synonyms of the genus are Lemaireocereus Britton & Rose, Lophocereus Britton & Rose, Anisocereus Backeb. , Marginatocereus Backeb. , Mitrocereus Backeb. , Backebergia Bravo, Pterocereus T.MacDoug. & Miranda and Pseudomitrocereus Bravo & Buxb.

Evidence

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