Muhlenbergia capillaris

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Muhlenbergia capillaris
Muhl capi.jpg
Photo by John R. Gwaltney, Southeastern Flora.com
Scientific classification
Kingdom: Plantae
Division: Tracheophyta- Vascular plants
Class: Lilianeae -Monocotyledons
Order: Poales
Family: Poaceae
Genus: Muhlenbergia
Species: M. capillaris
Binomial name
Muhlenbergia capillaris
(Lam.) Trin.
Muhl capi dist.jpg
Natural range of Muhlenbergia capillaris from USDA NRCS Plants Database.

Common names: Hairgrass[1]

Taxonomic notes

Synonyms: none.[1]

Varieties: none.[1]

Description

"Perennials. Blades usually scaberulous on both surfaces and margins; sheath margins scarious, at least apically; ligules scarious, erose or erose-ciliate. Spikelets 1-flowered. Glumes equaling or shorter than lemmas, lemmas not indurate. Grain enclosed by lemma and palea at maturity."[2]

"Cespitose perennial; culms 5-12 dm tall, nodes and internodes glabrous. Leaves primarily basal; blades flat or involute, to 3 dm long, 103 mm wide; sheaths scaberulous; ligules 2-5 mm long. Panicle open, diffuse, delicate, 2-5 dm long, 1-2 dm broad; branches capillary, spreading, scaberulous. Spikelets usually purplish, lanceolate to narrowly ellipsoid, 4-5 mm long excluding awn; pedicels capillary, spreading, scaberulous. Glumes usually 1-nerved, usually scaberulous on midrib, scarious, 1st glume body 0.3-1.2 mm long, awn 0.3-1.2 mm long, 2nd glume body 1-1.5 mm long, awn 1-1.5 mm long; lemmas purplish, 3-nerved, scaberulous, body 3-4 mm long, awns 3-12 mm long; paleas purplish, faintly nerved, acuminate, 3-4 mm long. Grain purplish, narrowly ellipsoid, 2-2.4 mm long."[2]

Distribution

M. capillaris ranges from Massachusetts, New York, southern Ohio southern Indiana, southern Illinois, Missouri, and eastern Kansas to southern Florida, Louisiana, and southern Texas.[1]

Ecology

Habitat

M. capillaris has been found in marshes, open pineland, pine-turkey oak flats, drained buttonwood flats, sandy ridges, limerock, slash pineland, treeless chalk glades, and dike crests.[3] It is also found in disturbed areas like cleared construction sites.[3] Associated species: Sporobolus junceus, Dichanthelium dichotomum, Rudbeckia flugida, Schizachyrium scoparium, Pyracantha, Sideroxylon, and Berchemia.[3]

M. capillaris responds negatively to soil disturbance by agriculture in Southwest Georgia.[4] It also responds positively or not at all to soil disturbance by roller chopping in South Florida.[5]

Muhlenbergia capillaris var. trichopodes is frequent and abundant in the Clayhill Longleaf Woodlands and Lower Panhandle Savannas community types as described in Carr et al. (2010).[6]

Phenology

M. capillaris flowers from late August to October.[1]

Seed dispersal

This species is thought to be dispersed by gravity.[7]

Conservation, cultivation, and restoration

Cultural use

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 1.3 1.4 Weakley, A.S. 2015. Flora of the southern and mid-atlantic states. Working Draft of 21 May 2015. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
  2. 2.0 2.1 Radford, Albert E., Harry E. Ahles, and C. Ritchie Bell. Manual of the Vascular Flora of the Carolinas. 1964, 1968. The University of North Carolina Press. 107. Print.
  3. 3.0 3.1 3.2 Florida State University Herbarium Database. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2021. Collectors: Loran C. Anderson, Wilson Baker, Mark A Garland, R.K. Godfrey, Ed Keppner, Lisa Keppner, R. Kral, and O. Lakela. States and counties: Florida: Bay, Gadsden, Hillsborough, Leon, Madison, Monroe, and Wakulla.
  4. Kirkman, L.K., K.L. Coffey, R.J. Mitchell, and E.B. Moser. Ground Cover Recovery Patterns and Life-History Traits: Implications for Restoration Obstacles and Opportunities in a Species-Rich Savanna. (2004). Journal of Ecology 92(3):409-421.
  5. Lewis, C.E. (1970). Responses to Chopping and Rock Phosphate on South Florida Ranges. Journal of Range Management 23(4):276-282.
  6. Carr, S.C., K.M. Robertson, and R.K. Peet. 2010. A vegetation classification of fire-dependent pinelands of Florida. Castanea 75:153-189.
  7. Kirkman, L. Katherine. Unpublished database of seed dispersal mode of plants found in Coastal Plain longleaf pine-grasslands of the Jones Ecological Research Center, Georgia.