Synonym(s): Scirpus atrovirens var. flaccidifolius
Image ID: 97342
Image by: Fleming, Gary P.
Image Collection: NCBG Digital Library
PLANT INDEX
ID_PLANT: SCFL2
SCIENTIFIC NAME: Scirpus flaccidifolius
Include in WOTAS: 0
Publish to Web: 1
Last Modified: 2016-12-31
GENUS INDEX
GENUS CODE: SCIRP GENUS SCIENTIFIC:Scirpus GENUS AUTHORITY: L. GENUS COMMON: Bulrush GENUS SUMMARY: A genus of about 20 species, herbs, of circumboreal distribution, also with species in Australia, Malaysia, and South America. The complex of species including S. atrovirens, S. georgianus, S. hattorianus, S. flaccidifolius are difficult to identify, and some have doubted their validity. Although further work on this group is needed, they do generally appear to behave as biological species despite their morphological similarity. Schuyler (1967) writes that the remaining species in the key differ in minute characteristics and often the most satisfactory means of identification is by carefully comparing specimens of them. Despite the close morphological similarity of these species, their characteristics are reasonably constant even in areas where they coexist and occasionally hybridize. GENUS IDENTIFICATION: GENUS REFERENCES: Whittemore & Schuyler in FNA (2002b); Schuyler (1967)=Z; Strong (1994)=Y;. Key adapted from C, FNA, GW, and Z. [for various taxa previously placed in Scirpus, also see Bolboschoenus, Cyperus, Isolepis, Schoenoplectiella, Schoenoplectus, and Trichophorum]
FAMILY INDEX
FAMILY CODE: CYPERA FAMILY SCIENTIFIC:Cyperaceae FAMILY AUTHORITY: A.L. de Jussieu 1789 FAMILY COMMON: Sedge Family FAMILY SUMMARY: A family of about 100 genera and 5000 species, mostly herbs, cosmopolitan. FAMILY REFERENCE: Ball, Reznicek, & Murray in FNA (2002b); Muasya et al. (2009); Tucker (1987); Goetghebeur in Kubitzki (1998b).
This information is derived from the U.S. Army Corps of Engineers 2016 National Wetland Plant List, Version 3.3 (Lichvar, R.W., D.L. Banks, W.N. Kirchner, and N.C. Melvin. 2016. The National Wetland Plant List: 2016 wetland ratings. Phytoneuron 2016-30: 1-17. Published 28 April 2016. ISSN 2153 733X). Regions: AGCP-Atlantic and Gulf Coastal Plain, AK-Alaska, AW-Arid West, CB-Caribbean, EMP-Eastern Mountains and Piedmont, GP-Great Plains, HI-Hawaii, MW-Midwest, NCNE-Northcentral and Northeast, WMCV-Western Mountains, Valleys & Coast
2018 Natural Heritage Program List of Rare Plant Species of North Carolina
This information is derived from the 2018 North Carolina Natural Heritage Program List of Rare Plant Species.
WEAKLEY FLORA
SCIENTIFIC NAME: Scirpus flaccidifolius
COMMON NAME: Reclining Bulrush
SYNONYMY: [= FNA, K, Va, Z; < S. atrovirens var. atrovirens - C; = S. atrovirens Willdenow var. flaccidifolius Fernald - F]
PHENOLOGY: Late May-early Jul.
HABITAT: Bottomlands.
COMMENTS: Endemic to se. VA and ne. NC. Ludwig (1993) found the following characters to be most useful in distinguishing S. flaccidifolius from S. georgianus growing in the same region: bristles 1.2-1.4 mm long (vs. absent or mostly < 0.2, rarely to 1.0 mm long in S. georgianus), spikelets 1.5-2.1 mm wide (vs. 1.1-2.2 mm wide), spikelets 3-9 (-12) per glomerule (vs. 4-23), and inflorescence rays 5.5-17.9 cm long (vs. 3.5-13.5 cm long). Bristle length was the only character which consistently separated the 2 species; other characters showed overlapping values of possibly statistical value.
RANGE MAP: Scirpus flaccidifolius.png
Key to Map SymbolsABOUT FAMILY (Weakley Flora) Cyperaceae A.L. de Jussieu 1789 (Sedge Family) SUMMARY: A family of about 100 genera and 5000 species, mostly herbs, cosmopolitan. REFERENCE: Ball, Reznicek, & Murray in FNA (2002b); Muasya et al. (2009); Tucker (1987); Goetghebeur in Kubitzki (1998b).ABOUT GENUS (Weakley Flora) Scirpus L. (Bulrush) SUMMARY: A genus of about 20 species, herbs, of circumboreal distribution, also with species in Australia, Malaysia, and South America. The complex of species including S. atrovirens, S. georgianus, S. hattorianus, S. flaccidifolius are difficult to identify, and some have doubted their validity. Although further work on this group is needed, they do generally appear to behave as biological species despite their morphological similarity. Schuyler (1967) writes that the remaining species in the key differ in minute characteristics and often the most satisfactory means of identification is by carefully comparing specimens of them. Despite the close morphological similarity of these species, their characteristics are reasonably constant even in areas where they coexist and occasionally hybridize. REFERENCE: Whittemore & Schuyler in FNA (2002b); Schuyler (1967)=Z; Strong (1994)=Y;. Key adapted from C, FNA, GW, and Z. [for various taxa previously placed in Scirpus, also see Bolboschoenus, Cyperus, Isolepis, Schoenoplectiella, Schoenoplectus, and Trichophorum]
HERBARIUM RESOURCES
SERNEC: Find Scirpus flaccidifolius in Southeast Regional Network of Experts and Collections (if available) UNC SERNEC: Find Scirpus flaccidifolius in
University of North Carolina Chapel Hill Herbarium - Southeast Regional Network of Experts and Collections (if available)