Scirpus pendulus - Muhl.
Pendulous Bulrush
Other English Common Names: Rufous Bulrush
Other Common Names: rufous bulrush
Taxonomic Status: Accepted
Related ITIS Name(s): Scirpus pendulus Muhl. (TSN 40273)
Unique Identifier: ELEMENT_GLOBAL.2.150647
Element Code: PMCYP0Q160
Informal Taxonomy: Plants, Vascular - Flowering Plants - Sedge Family
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Monocotyledoneae Cyperales Cyperaceae Scirpus
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Concept Reference
Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Scirpus pendulus
Conservation Status

NatureServe Status

Global Status: G5
Global Status Last Reviewed: 13May2016
Global Status Last Changed: 06Sep1984
Ranking Methodology Used: Ranked by inspection
Rounded Global Status: G5 - Secure
Nation: United States
National Status: N5?
Nation: Canada
National Status: N5 (07Oct2016)

U.S. & Canada State/Province Status
United States Alabama (SNR), Arizona (SNR), Arkansas (SNR), California (S1), Connecticut (S3S4), Delaware (S2), District of Columbia (SNR), Florida (SNR), Georgia (S1), Illinois (S5), Indiana (SNR), Iowa (S4), Kansas (SNR), Kentucky (S5), Maine (S2), Maryland (S3), Massachusetts (S3), Michigan (SNR), Minnesota (SNR), Mississippi (S4), Missouri (SNR), Montana (SU), Nebraska (S3S5), New Hampshire (S1), New Jersey (S3), New Mexico (SNR), New York (S5), North Carolina (S1), Ohio (SNR), Oklahoma (SNR), Oregon (S1), Pennsylvania (SNR), South Carolina (SNR), South Dakota (SNR), Tennessee (SNR), Texas (SU), Vermont (S4), Virginia (S5), West Virginia (S4), Wisconsin (SNR), Wyoming (S1)
Canada New Brunswick (S1), Ontario (S5), Quebec (S3)

Other Statuses

NatureServe Global Conservation Status Factors

Other NatureServe Conservation Status Information

U.S. States and Canadian Provinces
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States AL, AR, AZ, CA, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, MA, MD, ME, MI, MN, MO, MS, MT, NC, NE, NH, NJ, NM, NY, OH, OK, OR, PA, SC, SD, TN, TX, VA, VT, WI, WV, WY
Canada NB, ON, QC

Range Map
No map available.

U.S. Distribution by County Help
State County Name (FIPS Code)
CA Siskiyou (06093)
CT Fairfield (09001)*, Litchfield (09005)*
DE Kent (10001), New Castle (10003)
MA Berkshire (25003), Bristol (25005), Essex (25009), Franklin (25011), Hampshire (25015), Worcester (25027)
ME Cumberland (23005), Penobscot (23019), York (23031)
NC Cabarrus (37025), Carteret (37031), Durham (37063)*, Granville (37077), Onslow (37133)
NH Hillsborough (33011)*, Strafford (33017), Sullivan (33019)
NJ Sussex (34037), Warren (34041)
OR Curry (41015), Jackson (41029), Josephine (41033), Klamath (41035), Lane (41039), Linn (41043), Marion (41047)*
VT Essex (50009)
WY Converse (56009)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
01 Lower Penobscot (01020005)+, Lower Kennebec (01030003)+, Presumpscot (01060001)+, Saco (01060002)+, Piscataqua-Salmon Falls (01060003)+, Nashua (01070004)+, Merrimack (01070006)+*, Upper Connecticut (01080101)+, Middle Connecticut (01080201)+, Charles (01090001)+, Narragansett (01090004)+, Housatonic (01100005)+, Saugatuck (01100006)+*
02 Hudson-Hoosic (02020003)+, Middle Delaware-Musconetcong (02040105)+, Brandywine-Christina (02040205)+, Broadkill-Smyrna (02040207)+, Choptank (02060005)+
03 Upper Tar (03020101)+*, Pamlico Sound (03020105)+, Upper Neuse (03020201)+, White Oak River (03020301)+, Rocky, North Carolina, (03040105)+
10 Dry Fork Cheyenne (10120102)+
17 Middle Fork Willamette (17090001)+, Upper Willamette (17090003)+*, Mckenzie (17090004)+, South Santiam (17090006)+*, Middle Willamette (17090007)+*, Upper Rogue (17100307)+, Middle Rogue (17100308)+, Applegate (17100309)+, Lower Rogue (17100310)+, Illinois (17100311)+
18 Upper Klamath (18010206)+, Shasta (18010207)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
General Description: Pendulous bulrush is a glabrous, grass-like perennial with tufted stems, up to 15 dm (5 ft) tall. The several stem leaves are 3-10 mm wide. Numerous slender-stalked spikelets are borne in open groups in a branched, terminal inflorescence, usually 1 spikelet in each group sessile, the others long-stalked. The inflorescence is subtended by a leaf-like bract. Each cylindrical spikelet, 6-10 mm long, has numerous flowers arranged in a tight spiral. Flowers consist of a light brown, egg-shaped scale, ca. 2 mm long, with a green midvein, subtending 3 stamens and an ovary with 6 brown, twisted bristles, longer than the scales, arising from the base. The 3-sided seed (achene) is ca. 1 mm long with a short beak.
Diagnostic Characteristics: The combination of scales with a green midrib and bristles ca. twice as long as the achene separate this species from the similar S. CYPERINUS, S. MICROCARPUS, and S. PALLIDUS. A hand lens will be necessary for positive identification.
Economic Attributes Not yet assessed
Management Summary Not yet assessed
Population/Occurrence Delineation Not yet assessed
Population/Occurrence Viability
Excellent Viability: 51+ individuals.
Good Viability: 21-50 individuals.
Fair Viability: 11-20 individuals.
Poor Viability: 1-10 reoccurring individuals.
Date: 01Sep2005
Author: M. Franklin
U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

  • Andersen, M.D. and B. Heidel. 2011. HUC-based species range maps. Prepared by Wyoming Natural Diversity Database for use in the pilot WISDOM application operational from inception to yet-to-be-determined date of update of tool.

  • Bouchard, A., D. Barabé, M. Dumais et S. Hay 1983. Les plantes vasculaires rares du Québec. Syllogeus no 48. Musées nationaux du Canada. Ottawa. 75 p.

  • Dorn, R. D. 2001. Vascular Plants of Wyoming, third edition. Mountain West Publishing, Cheyenne, WY.

  • Gillett, J.M. et D.J. White. 1978. Liste des plantes vasculaires de la région d'Ottawa-Hull, Canada. Musée national des Sciences naturelles, Ottawa. 165 p.

  • Heidel, B. 2006. Additions to the flora of Wyoming. Castilleja 25:4-5.

  • Heidel, B. 2007. Survey of Spiranthes diluvialis (Ute ladies?-tresses) in eastern Wyoming, 2005-2006. Unpublished report prepared for Bureau of Land Management and the Medicine Bow/Routt National Forest/Thunder Basin National Grassland by the Wyoming Natural Diversity Database, Laramie, WY.

  • Heidel, B. and J. Larson. 2009. Noteworthy collections: Wyoming. Madroño 56:118-119.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Raymond, M. 1950. Esquisse phytogéographique du Québec. Mémoires du Jardin botanique de Montréal no 5. 147 p.

  • Whittemore, A. T. and A. E. Schuyler. 2002. Scirpus. Pages 8-21 in Flora of North America Editorial Committee, editor. Flora of North America North of Mexico. Vol. 23. Magnoliophyta: Commelinidae (in part): Cyperaceae. Oxford University Press, New York, NY.

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