• NSF NEON | Open Data to Understand our Ecosystems
  • Biorepository Data Portal

  • Home
  • Search
    • Sample search
    • Map search
    • Dynamic Species List
    • Taxonomic Explorer
  • Images
    • Image Browser
    • Image Search
  • Datasets
    • Research Datasets and Special Collections
    • Carabidae Checklists with Keys
    • Mosquito Checklists with Keys
    • Checklist: Research Sites - Invertebrates
    • Checklist: Research Sites - Plants
    • Checklist: Research Sites - Vertebrates
  • Sample Use
    • Sample Use Policy
    • Sample Request
    • Sample Archival Request
    • Dataset Publishing
  • How to Cite
  • Additional Information
    • Tutorials and Help
    • Biorepository Staff
    • About NEON
    • NEON Data Portal
    • ASU Biocollections
    • About Symbiota
  • Getting Started
Login New Account Sitemap
Carex rotundata Wahlenb.  

No occurrences found

Family: Cyperaceae
round sedge
[Carex melozitnensis A.E.Porsild]
Images
not available
  • FNA
  • Resources
Peter W. Ball & A. A. Reznicek in Flora of North America (vol. 23)
Plants cespitose; rhizomes long. Culms round in cross section, 17-48 cm, smooth distally. Leaves: basal sheaths brown, rarely red tinged; ligules shorter than wide; blades mid to dark green, wiry, filiform-involute, circular in cross section, 1.3-3(-3.2) mm wide, glabrous. Inflorescences 2-14 cm; proximal bract 0.7-10(-16) cm, shorter than or equaling inflorescence; proximal 1-2(-3) spikes pistillate, erect; terminal 1-2(-3) spikes staminate. Pistillate scales ovate, 2.4-4 × 1.3-2.1 mm, as long as or shorter than perigynia, margins entire, apex obtuse or acute, awnless. Perigynia spreading to reflexed, obscurely few-veined, veins not extending to beak, elliptic, 2.5-3.9(-4.2) × 1.4-2.3 mm, apex abruptly contracted, membranaceous; beak 0.4-0.8(-0.9) mm, obscurely bidentulate, smooth, teeth straight, to 0.3 mm. Stigmas 3. Achenes yellow, trigonous, smooth. 2n = 80. Fruiting Jul-Aug. Fens, bogs, wet tundra; 0-900 m; Man., Nfld. and Labr., N.W.T., Que., Yukon; Alaska; Eurasia. Hybrids between Carex rotundata and C. utriculata (= C. ×paludivagans Drury) are known from the Kuskokwim River Valley and Kenai Peninsula of Alaska (W. H. Drury Jr. 1956b; B. A. Ford et al. 1993). Althouth the hybrids can produce hardened achenes, the pollen is sterile. Hybrid plants are intermediate morphologically between the putative parents and possess no unique characters that distinguish them as distinct taxonomic entities (B. A. Ford et al. 1993).

Click to Display
0 Total Images
NSF NEON | Open Data to Understand our Ecosystems The National Ecological Observatory Network is a major facility fully funded by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.