Carex lemmonii

Carex lemmonii, or Lemmon's sedge, is a plant in the sedge family, and is endemic to California. Carex albida (binomial authority L.H.Bailey) is now considered a synonym, but was previously thought to be a separate species; such plants have the common name white sedge.[2]

Carex lemmonii

Secure  (NatureServe)[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Cyperaceae
Genus: Carex
Species:
C. lemmonii
Binomial name
Carex lemmonii
W.Boott
Synonyms
  • Carex albida L.H. Bailey
  • Carex abramsii Mack.
  • Carex luzulifolia f. albida (L.H. Bailey) Kük.
  • Carex sonomensis Stacey

Description

This sedge produces a dense or loose clump of erect stems 40 to 60 centimeters tall from a network of short rhizomes. The inflorescence is a cluster of 5 to 7 spikes over 15 centimeters long. Staminate flowers are located mainly on the terminal spike, while pistillate flowers are mainly located in the lateral spikes. The fruit is covered in a sac called a perigynium, which is green with a white beak.

White sedge

White sedge is endemic to Sonoma County, California, where it is known only from one occurrence at Pitkin Marsh, a wetland between Forestville and Sebastopol. There are fewer than 1000 plants,[3] and likely fewer than 300 according to more recent estimates.[4] It is a federally listed endangered species.

The colonies are scattered across 5 acres (20,000 m2) of a 27-acre (110,000 m2) tract.[3][4] As with other plants that reproduce vegetatively by cloning from their rhizomes, the number of true separate individual life forms is hard to estimate, so researchers count visible stems; a recent count revealed fewer than 300, a decrease from nearly 1000.[4] This sedge occurs near a rare local endemic, the Pitkin Marsh lily (Lilium pardalinum ssp. pitkinense).[4]

References


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.