Rahul Sharma (Editor)

Rhynchospora

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Kingdom
  
Family
  
Cyperaceae

Rank
  
Genus

Order
  
Scientific name
  
Rhynchospora

Higher classification
  
Sedges

Rhynchospora Rhynchospora Wikipedia

Lower classifications
  
Rhynchospora alba, Rhynchospora colorata, Rhynchospora californica

Bald rush rhynchospora nitens syn psilocarya nitens


Rhynchospora (beak-rush or beak-sedge) is a genus of about 400 species of sedges with a cosmopolitan distribution. The genus includes both annual and perennial species, mostly with erect 3-sided stems and 3-ranked leaves. The achenes bear a beak-like tubercule (hence the name “beak-rush”, although the plants are sedges, not rushes) and are sometimes subtended by bristles. Many of the species are similar in vegetative appearance, and mature fruits are needed to make a positive identification.

Contents

Rhynchospora Brown BeakSedge Rhynchospora fusca Biopix photoimage 35426

The infloresences (spikelets) are sometimes subtended by bracts which can be leaf-like or showy.

Beakrush horned rush small headed beak rush rhynchospora species


Ecology

Rhynchospora Rhynchospora capitellata brownish beaksedge Go Botany

Rhynchospora occurs on all continents except Antarctica, but is most diverse in the neotropics. It is most frequent in sunny habitats with wet, acidic soils. In marshes and savannas, Rhynchospora may be the dominant form of vegetation.

Taxonomy

Rhynchospora West African Plants A Photo Guide Rhynchospora corymbosa L

Contemporary taxonomic treatments include Rhynchospora and the related genus Pleurostachys in the tribe Rhynchosporae, a well-supported clade within Cyperaceae. The most comprehensive monograph of the genus divides Rhynchospora into two subgenera and 29 sections. A recent molecular analysis identifies two primary clades within the genus, with well-supported subgroups that agree with several of the sections identified by Kükenthal. However, this molecular analysis also suggests that Pleurostachys is embedded within one of the primary clades of Rhynchospora and that several of the recognized sections are not monophyletic.

Selected species
Rhynchospora httpsuploadwikimediaorgwikipediacommonsthu

  • Rhynchospora alba - White beak-sedge. Europe.
  • Rhynchospora californica - California beaked-rush, occurring in Marin and Sonoma County, California
  • Rhynchospora capitellata - Brownish beak-sedge
  • Rhynchospora colorata - White star sedge. Southeast North America.
  • Rhynchospora fusca - Brown beak-sedge. Europe.
  • Rhynchospora glomerata - Clustered beak-sedge. North America.
  • Rhynchospora knieskernii - Knieskern's beak-sedge.
  • Rhynchospora megaplumosa - Florida
  • Rhynchospora nervosa - Tropical New World.
  • Rhynchospora waspamensis - New World.

  • Rhynchospora Online Plant Guide Rhynchospora colorata White Star Sedge

    References

    Rhynchospora Wikipedia


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