Difference between revisions of "Piptochaetium avenaceum"

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{{taxobox
 
{{taxobox
 
| name = Piptochaetium avenaceum
 
| name = Piptochaetium avenaceum
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| image = Insert.jpg
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| image = Pipto_aven.jpg
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| image_caption =  
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| image_caption = Photo by Guy Anglin, [http://www.florida.plantatlas.usf.edu/Default.aspx Atlas of Florida Vascular Plants]
 
| regnum = Plantae
 
| regnum = Plantae
 
| divisio = Magnoliophyta - Flowering plants
 
| divisio = Magnoliophyta - Flowering plants
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| binomial_authority =  (L.) Parodi
 
| binomial_authority =  (L.) Parodi
 
| range_map = PIPT_AVEN_dist.jpg
 
| range_map = PIPT_AVEN_dist.jpg
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| range_map_caption = Natural range of ''Piptochaetium avenaceum'' from USDA NRCS [http://www.plants.usda.gov Plants Database].
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| range_map_caption = Natural range of ''Piptochaetium avenaceum'' from USDA NRCS [http://plants.usda.gov/core/profile?symbol=PIAV Plants Database].
 
}}
 
}}
  
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Common name: blackseed speargrass
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Common names: blackseed speargrass, eastern needlegrass, black oatgrass<ref name=weakley>Weakley, A.S. 2020. Flora of the Southeastern United States. Edition of 20 October 2020. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.</ref>, blackseed needlegrass<ref>Denhof, Carol. 2020. Plant Spotlight ''Piptochaetium avenaceum'' (L.) Parodi Blackseed Needlegrass Grass Family - Poaceae. The Longleaf Leader. Vol. XIII, Issue 1. Pg. 7</ref> <ref>Miller, J.H. and K.V. Miller. 2005. Forest Plants of the Southeast and their Wildlife Uses. The University of Georgia Press. Athens, GA. 454pp.</ref><ref>USDA, NRCS. 2020. The PLANTS Database (http://plants.usda.gov, 11 February 2-2-). National Plant Data Team, Greensboro, NC 27401-4901 USA.</ref>
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==Taxonomic notes==
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Synonyms: ''Stipa avenacea'' Linnaeus<ref name=weakley/>
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Varieties: none<ref name=weakley/>
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==Description==  
 
==Description==  
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<!-- Basic life history facts such as annual/perrenial, monoecious/dioecious, root morphology, seed type, etc. -->
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<!-- Basic life history facts such as annual/perennial, monoecious/dioecious, root morphology, seed type, etc. -->
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''P. avenaceum'' is a cespitose perennial with culms that are 5-10 dm tall and glabrous nodes and internodes. The leaves are basal, with blades that are 3.5 dm long, 1-1.5 mm wides, scaberulous above and on the margins, and glabrous beneath. The sheaths are 2 mm long and have a glabrous texture, scarious margin and ligule. The open panicle is 1-3 dm long and 3-6 cm broad. The branches are ascending and scaberulous. Spikelets are 1-flowered, disarticulating above glumes, and 1 cm long (excluding the lemma awn). Glumes are scarious, acuminate to short-awned. The first glume is 3-nerved and 9-11 mm long, while the second glume is 5-nerved and 11-13 mm long. The lemmas are nerveless, brownish-purplish, lustrous, indurate, with scarious margins. Their bodies are 9-10 mm long and their awns are 4-6 cm long. The paleas are 9-10 mm long, scarious, glabrous, acuminate, with a brown hirsute callus. The grain is yellowish, linear, and 5-6 mm long.<ref name="radford">Radford, A. E., Ahles, H. E., & Bell, C. R. (1968). Manual of the vascular flora of the Carolinas. Chapel Hill: University of North Carolina Press.</ref>
  
 
==Distribution==
 
==Distribution==
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This plant ranges from Massachusetts, Kentucky, southern Illinois, and central Oklahoma to central Florida and southern Texas. There are disjunct populations in northern Indiana and western Michigan.<ref name=weakley/>
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==Ecology==
 
==Ecology==
 
===Habitat=== <!--Natural communities, human disturbed habitats, topography, hydrology, soils, light, fire regime requirements for removal of competition, etc.-->
 
===Habitat=== <!--Natural communities, human disturbed habitats, topography, hydrology, soils, light, fire regime requirements for removal of competition, etc.-->
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In the Coastal Plain in Florida and Georgia, ''Piptochaetium avenaceum'' is found in live oak groves, open sandy ridges, mesic coastal hammocks, woodland openings, floodplain edges, along creeks, lake slopes, upland mixed forests, mixed pinewoods, open mixed woodlands, annually burned savannas and pine-oak, open stand of shrubs and trees of ''Ilex vomitoria'', and floodplains.<ref name="FSU Herbarium">Florida State University Robert K. Godfrey Herbarium database. URL: [http://herbarium.bio.fsu.edu http://herbarium.bio.fsu.edu]. Last accessed: July 2015. Collectors: Loran C. Anderson, K. MacClendon, T. MacClendon, Robert K. Godfrey, K. Craddock Burks, Jean W. Wooten, Swallen, George R. Cooley, Joseph Monachino, Gary R. Knight, Brenda Herring, Don Herring, Richard S. Mitchell, H. Kurz, Patricia Elliot, R. Komarek, R. A. Norris,  Matt Hils, Annie Schmidt. States and Counties: Florida: Alachua, Calhoun, Escambia, Gadsden, Hernando, Holmes, Jackson, Jefferson, Leon, Liberty, Nassau, Okaloosa, St. Johns, Suwannee, Wakulla. Georgia: Grady, Thomas. Compiled by Tall Timbers Research Station and Land Conservancy.</ref> Human disturbed areas include roadsides, recreation areas, nature trails, stands of old field pines cleared of underbrush, and along city roads. It has been observed to grow in dry loamy sand, sandy soils, limestone outcrops, calcareous slopes and moist loamy sands.<ref name="FSU Herbarium"/>
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''P. avenaceum'' reduced its occurrence in response to soil disturbance by agriculture in old field longleaf communities in South Carolina. It has shown resistance to regrowth in reestablished native habitat that was disturbed by agricultural practices, making it a remnant woodland indicator species.<ref>Brudvig, L.A. and E.I. Damchen. (2011). Land-use history, historical connectivity, and land management interact to determine longleaf pine woodland understory richness and composition. Ecography 34: 257-266.</ref><ref>Brudvig, L.A., E Grman, C.W. Habeck, and J.A. Ledvina. (2013). Strong legacy of agricultural land use on soils and understory plant communities in longleaf pine woodlands. Forest Ecology and Management 310: 944-955.</ref><ref>Brudvig, L.A., J.L. Orrock, E.I. Damschen, C.D. Collins, P.G. Hahn, W.B. Mattingly, J.W. Veldman, and J.L. Walker. (2014). Land-Use History and Contemporary Management Inform an Ecological Reference Model for Longleaf Pine Woodland Understory Plant Communities. PLoS ONE 9(1): e86604.</ref>
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Associated species include ''Melica mutica, Festuca, Erigeron, Verbena, Vitis rotundifolia, Rubus trivialis'' and  ''Ilex vomitoria.''<ref name="FSU Herbarium"/>
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===Phenology=== <!--Timing off flowering, fruiting, seed dispersal, and environmental triggers.  Cite PanFlora website if appropriate: http://www.gilnelson.com/PanFlora/ -->
 
===Phenology=== <!--Timing off flowering, fruiting, seed dispersal, and environmental triggers.  Cite PanFlora website if appropriate: http://www.gilnelson.com/PanFlora/ -->
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===Seed dispersal===
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''P. avenaceum'' flowers from April through June.<ref name=weakley/>
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===Seed bank and germination===
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<!--===Seed dispersal===-->
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<!--===Seed bank and germination===-->
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===Fire ecology=== <!--Fire tolerance, fire dependence, adaptive fire responses-->
 
===Fire ecology=== <!--Fire tolerance, fire dependence, adaptive fire responses-->
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===Pollination===  
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Needlegrass is one of the dominant ground cover species across longleaf pine forest; it provides a vital source of fuel for prescribed fire that is necessary to maintain the habitat.<ref>Denhof, Carol. 2020. Plant Spotlight ''Piptochaetium avenaceum'' (L.) Parodi Blackseed Needlegrass Grass Family - Poaceae. The Longleaf Leader. Vol. XIII, Issue 1. Pg. 7</ref><ref>Miller, J.H. and K.V. Miller. 2005. Forest Plants of the Southeast and their Wildlife Uses. The University of Georgia Press. Athens, GA. 454pp.</ref><ref>USDA, NRCS. 2020. The PLANTS Database (http://plants.usda.gov, 11 February 2-2-). National Plant Data Team, Greensboro, NC 27401-4901 USA.</ref>
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===Use by animals=== <!--Herbivory, granivory, insect hosting, etc.-->
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===Diseases and parasites===
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<!--===Pollination===-->
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==Conservation and Management==
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===Herbivory and toxicology=== <!--Common herbivores, granivory, insect hosting, poisonous chemicals, allelopathy, etc-->
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==Cultivation and restoration==
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The seeds of ''P. avenaceum'' are a food source for songbirds.<ref>Denhof, Carol. 2020. Plant Spotlight ''Piptochaetium avenaceum'' (L.) Parodi Blackseed Needlegrass Grass Family - Poaceae. The Longleaf Leader. Vol. XIII, Issue 1. Pg. 7</ref><ref>Miller, J.H. and K.V. Miller. 2005. Forest Plants of the Southeast and their Wildlife Uses. The University of Georgia Press. Athens, GA. 454pp.</ref><ref>USDA, NRCS. 2020. The PLANTS Database (http://plants.usda.gov, 11 February 2-2-). National Plant Data Team, Greensboro, NC 27401-4901 USA.</ref>
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<!--===Diseases and parasites===-->
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==Conservation, cultivation, and restoration==
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==Cultural use==
 
==Photo Gallery==
 
==Photo Gallery==
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<gallery widths=180px>
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</gallery>
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==References and notes==
 
==References and notes==

Latest revision as of 09:23, 20 June 2023

Piptochaetium avenaceum
Pipto aven.jpg
Photo by Guy Anglin, Atlas of Florida Vascular Plants
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Liliopsida – Monocotyledons
Order: Cyperales
Family: Poaceae ⁄ Gramineae
Genus: Piptochaetium
Species: P. avenaceum
Binomial name
Piptochaetium avenaceum
(L.) Parodi
PIPT AVEN dist.jpg
Natural range of Piptochaetium avenaceum from USDA NRCS Plants Database.

Common names: blackseed speargrass, eastern needlegrass, black oatgrass[1], blackseed needlegrass[2] [3][4]

Taxonomic notes

Synonyms: Stipa avenacea Linnaeus[1]

Varieties: none[1]

Description

P. avenaceum is a cespitose perennial with culms that are 5-10 dm tall and glabrous nodes and internodes. The leaves are basal, with blades that are 3.5 dm long, 1-1.5 mm wides, scaberulous above and on the margins, and glabrous beneath. The sheaths are 2 mm long and have a glabrous texture, scarious margin and ligule. The open panicle is 1-3 dm long and 3-6 cm broad. The branches are ascending and scaberulous. Spikelets are 1-flowered, disarticulating above glumes, and 1 cm long (excluding the lemma awn). Glumes are scarious, acuminate to short-awned. The first glume is 3-nerved and 9-11 mm long, while the second glume is 5-nerved and 11-13 mm long. The lemmas are nerveless, brownish-purplish, lustrous, indurate, with scarious margins. Their bodies are 9-10 mm long and their awns are 4-6 cm long. The paleas are 9-10 mm long, scarious, glabrous, acuminate, with a brown hirsute callus. The grain is yellowish, linear, and 5-6 mm long.[5]

Distribution

This plant ranges from Massachusetts, Kentucky, southern Illinois, and central Oklahoma to central Florida and southern Texas. There are disjunct populations in northern Indiana and western Michigan.[1]

Ecology

Habitat

In the Coastal Plain in Florida and Georgia, Piptochaetium avenaceum is found in live oak groves, open sandy ridges, mesic coastal hammocks, woodland openings, floodplain edges, along creeks, lake slopes, upland mixed forests, mixed pinewoods, open mixed woodlands, annually burned savannas and pine-oak, open stand of shrubs and trees of Ilex vomitoria, and floodplains.[6] Human disturbed areas include roadsides, recreation areas, nature trails, stands of old field pines cleared of underbrush, and along city roads. It has been observed to grow in dry loamy sand, sandy soils, limestone outcrops, calcareous slopes and moist loamy sands.[6]

P. avenaceum reduced its occurrence in response to soil disturbance by agriculture in old field longleaf communities in South Carolina. It has shown resistance to regrowth in reestablished native habitat that was disturbed by agricultural practices, making it a remnant woodland indicator species.[7][8][9]

Associated species include Melica mutica, Festuca, Erigeron, Verbena, Vitis rotundifolia, Rubus trivialis and Ilex vomitoria.[6]

Phenology

P. avenaceum flowers from April through June.[1]

Fire ecology

Needlegrass is one of the dominant ground cover species across longleaf pine forest; it provides a vital source of fuel for prescribed fire that is necessary to maintain the habitat.[10][11][12]

Herbivory and toxicology

The seeds of P. avenaceum are a food source for songbirds.[13][14][15]

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. 2020. Flora of the Southeastern United States. Edition of 20 October 2020. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
  2. ↑ Denhof, Carol. 2020. Plant Spotlight Piptochaetium avenaceum (L.) Parodi Blackseed Needlegrass Grass Family - Poaceae. The Longleaf Leader. Vol. XIII, Issue 1. Pg. 7
  3. ↑ Miller, J.H. and K.V. Miller. 2005. Forest Plants of the Southeast and their Wildlife Uses. The University of Georgia Press. Athens, GA. 454pp.
  4. ↑ USDA, NRCS. 2020. The PLANTS Database (http://plants.usda.gov, 11 February 2-2-). National Plant Data Team, Greensboro, NC 27401-4901 USA.
  5. ↑ Radford, A. E., Ahles, H. E., & Bell, C. R. (1968). Manual of the vascular flora of the Carolinas. Chapel Hill: University of North Carolina Press.
  6. ↑ 6.0 6.1 6.2 Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: July 2015. Collectors: Loran C. Anderson, K. MacClendon, T. MacClendon, Robert K. Godfrey, K. Craddock Burks, Jean W. Wooten, Swallen, George R. Cooley, Joseph Monachino, Gary R. Knight, Brenda Herring, Don Herring, Richard S. Mitchell, H. Kurz, Patricia Elliot, R. Komarek, R. A. Norris, Matt Hils, Annie Schmidt. States and Counties: Florida: Alachua, Calhoun, Escambia, Gadsden, Hernando, Holmes, Jackson, Jefferson, Leon, Liberty, Nassau, Okaloosa, St. Johns, Suwannee, Wakulla. Georgia: Grady, Thomas. Compiled by Tall Timbers Research Station and Land Conservancy.
  7. ↑ Brudvig, L.A. and E.I. Damchen. (2011). Land-use history, historical connectivity, and land management interact to determine longleaf pine woodland understory richness and composition. Ecography 34: 257-266.
  8. ↑ Brudvig, L.A., E Grman, C.W. Habeck, and J.A. Ledvina. (2013). Strong legacy of agricultural land use on soils and understory plant communities in longleaf pine woodlands. Forest Ecology and Management 310: 944-955.
  9. ↑ Brudvig, L.A., J.L. Orrock, E.I. Damschen, C.D. Collins, P.G. Hahn, W.B. Mattingly, J.W. Veldman, and J.L. Walker. (2014). Land-Use History and Contemporary Management Inform an Ecological Reference Model for Longleaf Pine Woodland Understory Plant Communities. PLoS ONE 9(1): e86604.
  10. ↑ Denhof, Carol. 2020. Plant Spotlight Piptochaetium avenaceum (L.) Parodi Blackseed Needlegrass Grass Family - Poaceae. The Longleaf Leader. Vol. XIII, Issue 1. Pg. 7
  11. ↑ Miller, J.H. and K.V. Miller. 2005. Forest Plants of the Southeast and their Wildlife Uses. The University of Georgia Press. Athens, GA. 454pp.
  12. ↑ USDA, NRCS. 2020. The PLANTS Database (http://plants.usda.gov, 11 February 2-2-). National Plant Data Team, Greensboro, NC 27401-4901 USA.
  13. ↑ Denhof, Carol. 2020. Plant Spotlight Piptochaetium avenaceum (L.) Parodi Blackseed Needlegrass Grass Family - Poaceae. The Longleaf Leader. Vol. XIII, Issue 1. Pg. 7
  14. ↑ Miller, J.H. and K.V. Miller. 2005. Forest Plants of the Southeast and their Wildlife Uses. The University of Georgia Press. Athens, GA. 454pp.
  15. ↑ USDA, NRCS. 2020. The PLANTS Database (http://plants.usda.gov, 11 February 2-2-). National Plant Data Team, Greensboro, NC 27401-4901 USA.
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