Eryngium pinnatisectum

Eryngium pinnatisectum is an uncommon species of flowering plant in the carrot family, known by the common names Tuolumne eryngo and Tuolumne button celery.[1]

Eryngium pinnatisectum
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Apiales
Family:
Apiaceae
Genus:
Eryngium
Species:
E. pinnatisectum
Binomial name
Eryngium pinnatisectum

Distribution

The annual or perennial herb is endemic to central California, within areas of Sacramento County, Amador County, Calaveras County, and Tuolumne County.[2]

It is known from the eastern Central Valley, and adjacent lower Sierra Nevada foothills.[1]

It is a plant of wetlands, in vernal pools, foothill oak woodland (Cismontane woodland), yellow pine forest (Lower montane coniferous forest), freshwater wetlands, and wetland-riparian habitats.[1]

Description

Eryngium pinnatisectum is an erect perennial herb growing up to 0.5 metres (1.6 ft) tall. It has a thick, hairless pale green branching stem.[3]

The greenish-white leaves are long and very narrow, lance-shaped with several sharp lobes, reaching 30 centimeters long.[3]

The inflorescence is an array of spherical flower heads, each surrounded by sharp-pointed, narrow bracts with thickened edges. The pale greenish flowers in the globelike head bloom in white petals.[3] The blooming period is May to August.

Conservation

The plant is a California Native Plant Society listed Endangered species.[2]

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See also
  • Endemic flora of California
  • Flora of the Sierra Nevada (U.S.)
  • Natural history of the Central Valley (California)

References
  1. Calflora
  2. California Native Plant Society, Inventory of Rare and Endangered Plants (online edition, v8-02): Eryngium pinnatisectum . accessed 20 February 2017.
  3. Jepson eFlora
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