Acanthoscyphus

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Acanthoscyphus
Oxythecaparishiigoodmaniana.jpg
A. parishii var. goodmaniana
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Polygonaceae
Genus: Acanthoscyphus
Small
Species:
A. parishii
Binomial name
Acanthoscyphus parishii
(Parry) Small
Synonyms
  • Eriogonum abramsii subsp. acanthoscyphusS. Stokes
  • Oxytheca parishiiParry

Acanthoscyphus is a monotypic genus in the family Polygonaceae that contains the single species Acanthoscyphus parishii, which is sometimes called Parish's oxytheca. [1] This species is native and endemic to southern California. [2] [3]

Contents

Taxonomy

Four varieties of Acanthoscyphus parishii are recognized: [4] [5]

Description

It is an annual herb producing a waxy, hairless, leafless stem up to about 60 centimeters in maximum height in the spring when it is time to flower; during the winter the plant is a small rosette of oval leaves a few centimeters wide. The inflorescence atop the stem is an array of small cymes of flowers, each enveloped in a partially fused cup of bracts tipped in spinelike awns. The flower has six hairy white or pinkish lobes. [6]

Habitat and distribution

The species is endemic to California, where it is known only from the Transverse Ranges and nearby slopes of the southernmost Central Coast Ranges. It grows in dry and rocky mountain soils and has low water tolerance. It can be found at elevations of 1500-2500 meters. The species requires an annual precipitation of 30-104 centimeters and a temperature range of 26-31 degrees Celsius. The species has a growing period of 2-5 months and typically blooms between June and August. [1] [7]

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References

  1. 1 2 "Acanthoscyphus parishii Calflora". www.calflora.org. Retrieved 2020-11-12.
  2. "Acanthoscyphus Small | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2020-09-22.
  3. taxonomy. "Taxonomy browser (Acanthoscyphus)". www.ncbi.nlm.nih.gov. Retrieved 2020-09-22.
  4. "List of BLM California Special Status plants" (PDF). Bureau of Land Management.
  5. "Oldstyle id: 8559760bb14954e18bda2e945c91b827". Species 2000 & ITIS Catalogue of Life . Species 2000: Naturalis, Leiden, the Netherlands.
  6. "Acanthoscyphus parishii". ucjeps.berkeley.edu. Retrieved 2020-11-12.
  7. "CNPS Inventory Plant Detail". www.rareplants.cnps.org. Retrieved 2020-11-12.