Plant Index


 
 
 

Muhlenbergia expansa

Muhlenbergia expansa (Poir.) Trin.

savanna hairgrass

Synonym(s): Agrostis trichopodes, Muhlenbergia capillaris var. trichopodes
Muhlenbergia expansa (Savanna Hairgrass)
Image ID: 15759
Image by: Sorrie, Bruce A.
Image Collection: NCBG Digital Library

PLANT INDEX

ID_PLANT: MUEX
SCIENTIFIC NAME: Muhlenbergia expansa
Include in WOTAS: 0
Publish to Web: 1
Last Modified: 2019-02-25

GENUS INDEX

GENUS CODE: MUHLE
GENUS SCIENTIFIC: Muhlenbergia
GENUS AUTHORITY: Schreb.
GENUS COMMON: Muhly
GENUS SUMMARY: A genus of about 176 species, perennials and annuals, of North America south to Andean South America, and e. and se. Asia. Muhlenbergia is a large and diverse genus, recently reclassified by Peterson, Romaschenko, & Johnson (2010b); the subgenera used here follow that classification.
GENUS IDENTIFICATION:
GENUS REFERENCES: Peterson, Romaschenko, & Johnson (2010b); Pohl (1969); Gustafson & Peterson (2007)=Y; Morden & Hatch (1989)=Z; Peterson in FNA (2003a).

FAMILY INDEX

FAMILY CODE: POACEA
FAMILY SCIENTIFIC: Poaceae
FAMILY AUTHORITY: (R. Brown) Barnhart 1895 or GRAMINEAE A.L. de Jussieu 1789
FAMILY COMMON: Grass Family
FAMILY SUMMARY: A family of about 771 genera and 12,074 species, herbs (and some shrubs and trees), cosmopolitan. Tribal classification largely follows FNA (2003a, 2007a), with some changes based on subsequent research, as for instance in the Chloridoideae (Peterson, Romaschenko, & Johnson 2010a).
FAMILY REFERENCE: Flora of North America Editorial Committee (2003a, 2007a)=FNA; Hitchcock and Chase (1950)=HC; Blomquist (1948); Peterson, Romaschenko, & Johnson (2010a, 2010b). Key to genera adapted in large part from FNA.

NCBG DESCRIPTIVES

INTRO:
STEMS:
LEAVES:
INFLORESCENCE:
FLOWERS:
FRUITS:
COMMENTS:
HEIGHT:

DURATION: Perennial
HABIT: Grass/Grasslike

LEAF ARRANGEMENT:
LEAF COMPLEXITY:
LEAF RETENTION:

FLORAL CHARACTERISTICS
SYMMETRY:
BLOOM TIME: Sep-Oct
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
x x x x

BLOOM COLOR:
White Red Pink Orange Yellow Green Blue Lavender Purple Violet Brown Not Applicable

FRUITING PERIOD:

DISTRIBUTION
HABITAT TYPE:
NATIVE RANGE: southeastern United States

HORTICULTURAL
Plant Sale Text:

Bloom Table Text:

NCBG Location:

Cultural Notes:

SOIL MOISTURE: Average, Moist/Wet
LIGHT EXPOSURE: Sun, Part Shade
MINIMUM HARDINESS ZONE:
MAXIMUM HARDINESS ZONE:
GERMINATION CODE:
WILDLIFE VALUE:
DEER RESISTANCE:

GRIM ACCESSIONS

acc_id acc_num acc_dt coll_id Action
7584 2000-0347 2000-10-18 View
8862 2011-0070 2011-04-28 241 View


GRIM COLLECTIONS

Coll_id Project Collection date Collector Action
241 HORT 2009-12-08 Poythress View


GRIM PLANTINGS

plt_num acc_id loc_num pers_num inst_dt Action
542 8862 48 NCBG staff 2011-04-27 View
543 8862 44 NCBG staff 2011-10-18 View
544 8862 48 NCBG staff 2011-10-18 View
545 8862 32 Mixon 2012-03-28 View
10672 7584 56 NCBG staff 1998-11-01 View
10673 7584 58 NCBG staff 1998-11-01 View

USDA PLANTS DATABASE

USDA Symbol: MUEX
USDA Common Name: Cutover Muhly
Native Status: L48 (N)
Distribution: USA (AL, FL, GA, KY, LA, MS, NC, SC, TX, VA)
Duration: Perennial
Growth Habit: Graminoid

NATIONAL WETLAND INDICATOR STATUS

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: FACW FACW FACW FACW

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

WEAKLEY FLORA

SCIENTIFIC NAME: Muhlenbergia expansa
COMMON NAME: Savanna Hairgrass
SYNONYMY: [= F, FNA, GW, HC, K2, RAB, S, Va, Y; = M. capillaris var. trichopodes (Elliott) Vasey - C, K1, WH3, Z]
PHENOLOGY: Sep-Oct.
HABITAT: Pine savannas, pine flatwoods, mesic areas in sandhill-pocosin ecotones.
COMMENTS: Se. VA south to FL, west to e. TX (nearly exactly the range of Pinus palustris). An important part of the grassy component of many longleaf pine savannas, M. expansas flowering is stimulated by fire, and, lacking fire, it may be found in large populations in solely vegetative condition. It can be distinguished in sterile condition from other savanna bunchgrasses (Sporobolus teretifolius, S. pinetorum, S. floridanus, S. curtissii, Aristida stricta, and A. beyrichiana) by the following characteristics: old leaf bases fibrous and curly (rather than hardened and cartilaginous) and ligules 1-3 mm long (rather than 0.2 to 0.5 mm long). The open panicle somewhat resembles that of several species of similar habitat which often co-occur with M. expansa Sporobolus teretifolius, S. pinetorum, S. curtissii, S. floridanus, and S. brevipilis, but the panicle of M. expansa is capillary, flexuous, and fragile, tending to break up over the winter (vs. fine-textured but not capillary, the branches rigid and ascending, more likely to persist over the winter in relatively intact condition). The vegetative characters listed above and under Sporobolus brevipilis are also useful. See M. capillaris for a discussion of recent studies on the M. capillaris complex.
RANGE MAP: Muhlenbergia expansa.png

Key to Map Symbols
ABOUT FAMILY (Weakley Flora)
Poaceae (R. Brown) Barnhart 1895 or GRAMINEAE A.L. de Jussieu 1789 (Grass Family)
SUMMARY: A family of about 771 genera and 12,074 species, herbs (and some shrubs and trees), cosmopolitan. Tribal classification largely follows FNA (2003a, 2007a), with some changes based on subsequent research, as for instance in the Chloridoideae (Peterson, Romaschenko, & Johnson 2010a).
REFERENCE: Flora of North America Editorial Committee (2003a, 2007a)=FNA; Hitchcock and Chase (1950)=HC; Blomquist (1948); Peterson, Romaschenko, & Johnson (2010a, 2010b). Key to genera adapted in large part from FNA.
ABOUT GENUS (Weakley Flora)
Muhlenbergia Schreb. (Muhly)
SUMMARY: A genus of about 176 species, perennials and annuals, of North America south to Andean South America, and e. and se. Asia. Muhlenbergia is a large and diverse genus, recently reclassified by Peterson, Romaschenko, & Johnson (2010b); the subgenera used here follow that classification.
REFERENCE: Peterson, Romaschenko, & Johnson (2010b); Pohl (1969); Gustafson & Peterson (2007)=Y; Morden & Hatch (1989)=Z; Peterson in FNA (2003a).

HERBARIUM RESOURCES

SERNEC: Find Muhlenbergia expansa in Southeast Regional Network of Experts and Collections (if available)
UNC SERNEC: Find Muhlenbergia expansa in University of North Carolina Chapel Hill Herbarium - Southeast Regional Network of Experts and Collections (if available)

WEB RESOURCES

USDA: Find Muhlenbergia expansa in USDA Plants
NPIN: Find Muhlenbergia expansa in NPIN Database
FNA: Find Muhlenbergia expansa in the Flora of North America (if available)
Google: Search Google for Muhlenbergia expansa

NCBG IMAGE RECORDS

ID IMAGE1: 15759
ID IMAGE2: 15761
ID IMAGE3: 0

From the Image Gallery


Image ID: 15761

Image ID: 15762

Image ID: 15763

Image ID: 15760

Image ID: 11536
6 photo(s) available in the Image Gallery

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