Difference between revisions of "Sassafras albidum"

From Coastal Plain Plants Wiki
Jump to: navigation, search
(Habitat)
(Ecology)
 
(16 intermediate revisions by 4 users not shown)
Line 1: Line 1:
 
{{italic title}}
 
{{italic title}}
Common Names: Nees sassafras<ref name= "USDA"> [https://plants.usda.gov/core/profile?symbol=CEAM USDA Plant Database]</ref>
+
Common Names: Nees sassafras<ref name= "USDA"> [https://plants.usda.gov/core/profile?symbol=CEAM USDA Plant Database]</ref>, cinnamon wood, smelling stick, ague tree<ref> Korchmal, Arnold & Connie. 1973. A Guide to the Medicinal Plants of the United States. The New York Times Book Company, New York.</ref>
 
<!-- Get the taxonomy information from the NRCS Plants database -->
 
<!-- Get the taxonomy information from the NRCS Plants database -->
 
{{taxobox
 
{{taxobox
Line 34: Line 34:
 
Habitats for ''S. albidum'' include forests, old fields, disturbed areas and even fencerows.<ref name= "Weakley"> Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.</ref>
 
Habitats for ''S. albidum'' include forests, old fields, disturbed areas and even fencerows.<ref name= "Weakley"> Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.</ref>
 
The tree prefers low pH soils.<ref name= "USDA"> [https://plants.usda.gov/core/profile?symbol=CEAM USDA Plant Database]</ref>
 
The tree prefers low pH soils.<ref name= "USDA"> [https://plants.usda.gov/core/profile?symbol=CEAM USDA Plant Database]</ref>
Specimens of this species have been taken from Moist loam at edges of woods, shaded mixed hardwoods region, fence rows, oak woodland, edge of orange groves, old foeld, river bluff, moist woods, limestone soil site, and a roadbank.<ref name = "FSU herbarium"> URL: http://herbarium.bio.fsu.edu. Last accessed: June 2018. Collectors: Loran Anderson, Kathy Craddock Burks, Gary R. Knight, R.K.Godfrey, Patricia Elliot, Sidney McDaniel, Richard S. Mitchell, Elmar C. Prichard,  Lovett Williams Jr., H. Kurz, Gwynn W. Ramsey, H. Larry E. Stripling, Wayne R. Faircloth, M. Garland, Delzie Demaree, Kurt E. Blum, Gary H. Morton, Frank Bowers, Robert. L. Lazor, John Moore, H.A. Wahl, John W. Thieret, Michael Cartrett, R. F. Doren, Clarke Hudson, Norlan C. Henderson, W.J. Taylor, S.B. Jones, States and counties: Florida (Leon, Jefferson, Jackson, Liberty, Volusia, Madison, Washington, Gadsden, Franklin, Wakulla) Georgia (Brooks, Stewart, Thomas), Virginia (Smyth, Giles), Arkansas (Saline, St. Francis), Tennessee (Summer, Campbell, Davidson), West Virginia (Monroe), Louisiana (Tangipahoa, Claiborne, Caddo), North Carolina (Macon, Wake), Mississippi (Covington, Jasper, Pike, Giles), Missouri (McDonald, Iron), Maryland (Anne Arundel), Louisiana (Beauregard, Bienville, Madison), Alabama (Colbert), New Jersey (Weston, Somerset), Pennsylvania (Juniata), Indiana (Huntington, Newton, Huntington)</ref> ''S. albidum'' exhibited no significant response to agricultural-based soil disturbance in South Carolina coastal plains communities.<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> ''S. albidum'' responds positively to soil disturbance by heavy silvilculture in North Carolina.<ref>Cohen, S., R. Braham, and F. Sanchez. (2004). Seed Bank Viability in Disturbed Longleaf Pine Sites. Restoration Ecology 12(4):503-515.</ref> When exposed to soil disturbance by military training in West Georgia, ''S. albidum'' responds negatively by way of absence.<ref>Dale, V.H., S.C. Beyeler, and B. Jackson. (2002). Understory vegetation indicators of anthropogenic disturbance in longleaf pine forests at Fort Benning, Georgia, USA. Ecological Indicators 1(3):155-170.</ref>
+
Specimens of this species have been taken from Moist loam at edges of woods, shaded mixed hardwoods region, fence rows, oak woodland, edge of orange groves, old foeld, river bluff, moist woods, limestone soil site, and a roadbank.<ref name = "FSU herbarium"> URL: http://herbarium.bio.fsu.edu. Last accessed: June 2018. Collectors: Loran Anderson, Kathy Craddock Burks, Gary R. Knight, R.K.Godfrey, Patricia Elliot, Sidney McDaniel, Richard S. Mitchell, Elmar C. Prichard,  Lovett Williams Jr., H. Kurz, Gwynn W. Ramsey, H. Larry E. Stripling, Wayne R. Faircloth, M. Garland, Delzie Demaree, Kurt E. Blum, Gary H. Morton, Frank Bowers, Robert. L. Lazor, John Moore, H.A. Wahl, John W. Thieret, Michael Cartrett, R. F. Doren, Clarke Hudson, Norlan C. Henderson, W.J. Taylor, S.B. Jones, States and counties: Florida (Leon, Jefferson, Jackson, Liberty, Volusia, Madison, Washington, Gadsden, Franklin, Wakulla) Georgia (Brooks, Stewart, Thomas), Virginia (Smyth, Giles), Arkansas (Saline, St. Francis), Tennessee (Summer, Campbell, Davidson), West Virginia (Monroe), Louisiana (Tangipahoa, Claiborne, Caddo), North Carolina (Macon, Wake), Mississippi (Covington, Jasper, Pike, Giles), Missouri (McDonald, Iron), Maryland (Anne Arundel), Louisiana (Beauregard, Bienville, Madison), Alabama (Colbert), New Jersey (Weston, Somerset), Pennsylvania (Juniata), Indiana (Huntington, Newton, Huntington)</ref>  
 +
 
 +
''S. albidum'' exhibited no significant response to agricultural-based soil disturbance in South Carolina or North Carolina coastal plains communities.<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>  
 +
 
 +
''S. albidum'' increased its presence in response to soil disturbance by heavy silvilculture in North Carolina longleaf pine sites. It has shown regrowth in reestablished longleaf sites that were disturbed by these practices.<ref>Cohen, S., R. Braham, and F. Sanchez. (2004). Seed Bank Viability in Disturbed Longleaf Pine Sites. Restoration Ecology 12(4):503-515.</ref>  
 +
 
 +
This species has become absent in response to military training in west Georgia pinelands. It has shown resistance to regrowth in reestablished longleaf pinelands that were disturbed by this activity.<ref>Dale, V.H., S.C. Beyeler, and B. Jackson. (2002). Understory vegetation indicators of anthropogenic disturbance in longleaf pine forests at Fort Benning, Georgia, USA. Ecological Indicators 1(3):155-170.</ref>
 
<!--Natural communities, human disturbed habitats, topography, hydrology, soils, light, fire regime requirements for removal of competition, etc.-->
 
<!--Natural communities, human disturbed habitats, topography, hydrology, soils, light, fire regime requirements for removal of competition, etc.-->
  
 
===Phenology===  
 
===Phenology===  
''S. albidum'' has been observed to flower in March. <ref name= "Pan Flora"> Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. www.gilnelson.com/PanFlora/ Accessed: 29 MAY 2018</ref>
+
''S. albidum'' has been observed to flower in March.<ref name= "Pan Flora"> Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. www.gilnelson.com/PanFlora/ Accessed: 29 MAY 2018</ref>
 
<!--Timing off flowering, fruiting, seed dispersal, and environmental triggers.  Cite PanFlora website if appropriate: http://www.gilnelson.com/PanFlora/ -->
 
<!--Timing off flowering, fruiting, seed dispersal, and environmental triggers.  Cite PanFlora website if appropriate: http://www.gilnelson.com/PanFlora/ -->
  
 
===Seed dispersal===
 
===Seed dispersal===
This species is thought to be dispersed by consumption by vertebrates. <ref> 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.</ref>
+
This species is thought to be dispersed by consumption by vertebrates.<ref> 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.</ref>
 
<!--===Seed bank and germination===-->
 
<!--===Seed bank and germination===-->
===Fire ecology===
 
Sassafras prefers environments that are subject to spring burns. They will be abundant in understory that is burned in late winter and spring burns. <ref name="kush">Kush, J. S., et al. (1999). "Understory plant community response after 23 years of hardwood control treatments in natural longleaf pine (Pinus palustris) forests." Canadian Journal of Forest Research 29: 1047-1054.</ref>
 
<!--Fire tolerance, fire dependence, adaptive fire responses-->
 
<!--===Pollination===-->
 
===Use by animals===
 
The fruit produced by the tree is commonly eaten by animals and in turn disperse the seeds. Such animals include, quail, wild turkeys, kingbirds, crested flycatchers, mockingbirds, sapsuckers, pileated woodpeckers, yellowthroat warblers, and phoebes. Other animals will eat the fruit, bark and wood as well; black bears, beavers, rabbits, and squirrels. Also, deer will forage in the foliage. <ref name= "USDA"> [https://plants.usda.gov/core/profile?symbol=CEAM USDA Plant Database]</ref>
 
  
This species is a variety of ''Persea'' and sassafras that is a primary food for the Palamedes swallowtail caterpillar. <ref name="spiegel">Spiegel, K. S. and L. M. Leege (2013). "Impacts of laurel wilt disease on redbay (Persea borbonia (L.) Spreng.) population structure and forest communities in the coastal plain of Georgia, USA." Biological Invasions 15(11): 2467-2487.</ref>
+
===Fire ecology===<!--Fire tolerance, fire dependence, adaptive fire responses-->
 +
Sassafras prefers environments that are subject to spring burns. They will be abundant in understory that is burned in late winter and spring burns.<ref name="kush">Kush, J. S., et al. (1999). "Understory plant community response after 23 years of hardwood control treatments in natural longleaf pine (Pinus palustris) forests." Canadian Journal of Forest Research 29: 1047-1054.</ref> Populations of ''S. albidum'' have been known to persist through repeated annual burns.<ref>Robertson, K.M. Unpublished data collected from Pebble Hill Fire Plots, Pebble Hill Plantation, Thomasville, Georgia.</ref><ref>Glitzenstein, J. S., D. R. Streng, R. E. Masters, K. M. Robertson and S. M. Hermann 2012. Fire-frequency effects on vegetation in north Florida pinelands: Another look at the long-term Stoddard Fire Research Plots at Tall Timbers Research Station. Forest Ecology and Management 264: 197-209.</ref><ref>Platt, W.J., R. Carter, G. Nelson, W. Baker, S. Hermann, J. Kane, L. Anderson, M. Smith, K. Robertson. 2021. Unpublished species list of Wade Tract old-growth longleaf pine savanna, Thomasville, Georgia.</ref>
 +
 
 +
<!--===Pollination===-->
 +
<!--===Herbivory and toxicology===<!--Common herbivores, granivory, insect hosting, poisonous chemicals, allelopathy, etc-->
 +
''Sassafras albidum'' has been observed to host bug species such as ''Cedusa sp.'' (family Derbidae), planthoppers such as ''Ormenoides venusta'' (family Flatidae), and leafhoppers from the Cicadellidae family such as ''Eratoneura ardens, Graphocephala fennahi, G. coccinea, G. teliformis, Typhlocyba sp.'' and ''Ormenoides venusta''.<ref>Discoverlife.org [https://www.discoverlife.org/20/q?search=Bidens+albaDiscoverlife.org|Discoverlife.org]</ref>
 +
 
 +
The fruit produced by the tree is commonly eaten by animals who in turn disperse the seeds. Such animals include: quail, wild turkeys, kingbirds, crested flycatchers, mockingbirds, sapsuckers, pileated woodpeckers, yellowthroat warblers, and phoebes. Other animals will eat the fruit, bark and wood as well; black bears, beavers, rabbits, and squirrels. Deer will forage in the foliage.<ref name= "USDA"> [https://plants.usda.gov/core/profile?symbol=CEAM USDA Plant Database]</ref> This species is a variety of ''Persea'' and sassafras that is a primary food for the Palamedes swallowtail caterpillar.<ref name="spiegel">Spiegel, K. S. and L. M. Leege (2013). "Impacts of laurel wilt disease on redbay (Persea borbonia (L.) Spreng.) population structure and forest communities in the coastal plain of Georgia, USA." Biological Invasions 15(11): 2467-2487.</ref>
 
<!--Herbivory, granivory, insect hosting, etc.-->
 
<!--Herbivory, granivory, insect hosting, etc.-->
  
 
===Diseases and parasites===
 
===Diseases and parasites===
Insects will eat the entire leaves and the plants can develop root rot is they are in an environment with wet clay soil. <ref name= "USDA"> [https://plants.usda.gov/core/profile?symbol=CEAM USDA Plant Database]</ref>
+
Insects will eat the entire leaves and the plants can develop root rot is they are in an environment with wet clay soil.<ref name= "USDA"> [https://plants.usda.gov/core/profile?symbol=CEAM USDA Plant Database]</ref> Laurel wilt impacting sassafras has been recorded in the Atlantic Coastal Plain region that the species is found.<ref name= "mayfield">Mayfield, A. E. and J. L. Hanula (2012). "Effect of Tree Species and End Seal on Attractiveness and Utility of Cut Bolts to the Redbay Ambrosia Beetle and Granulate Ambrosia Beetle (Coleoptera: Curculionidae: Scolytinae)." Journal of Economic Entomology 105(2): 461-470.</ref>
 +
 
 +
==Conservation, cultivation, and restoration==
  
Laurel wilt impacting sassafras has been recorded in the Atlantic Coastal Plain region that the species is found. <ref name= "mayfield">Mayfield, A. E. and J. L. Hanula (2012). "Effect of Tree Species and End Seal on Attractiveness and Utility of Cut Bolts to the Redbay Ambrosia Beetle and Granulate Ambrosia Beetle (Coleoptera: Curculionidae: Scolytinae)." Journal of Economic Entomology 105(2): 461-470.</ref>
+
==Cultural use==
 +
In the early 1800s the plant was used in a variety of treatments. Bronchitis, respiratory and digestive problems were treated with a tea from the root bark, and this same tea was used to slow milk production in nursing mothers, kidney problems, and dysentery. The bark was used as a poultice for treating sore eyes.<ref> Korchmal, Arnold & Connie. 1973. A Guide to the Medicinal Plants of the United States. The New York Times Book Company, New York.</ref>
  
==Conservation and Management==
+
The plant was famous for its possible medicinal uses and was used in root teas and gumbo. The bark could be dried and later eaten or then boiled with sugar to make sauce.<ref> Fernald, et al. 1958. Edible Plants of Eastern North America. Harper and Row Publishers, New York.</ref>
  
==Cultivation and restoration==
 
 
==Photo Gallery==
 
==Photo Gallery==
 
<gallery widths=180px>
 
<gallery widths=180px>
 
</gallery>
 
</gallery>
 
==References and notes==
 
==References and notes==

Latest revision as of 10:58, 15 July 2022

Common Names: Nees sassafras[1], cinnamon wood, smelling stick, ague tree[2]

Sassafras albidum
Sassafras albidum FI.jpg
Photo by Chris Evans, University of Illinois, Bugwood.org hosted at Forestryimages.org
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicots
Order: Laurales
Family: Lauraceae
Genus: Sassafras
Species: S. albidum
Binomial name
Sassafras albidum
(Nutt.) Nees
SASS ALBI DIST.JPG
Natural range of Sassafras albidum from USDA NRCS Plants Database.

Taxonomic Notes

Synonym: none

Variety: S. albidum var. molle (Rafinesque) Fernald

Description

S. albidum is a perennial shrub/tree of the Lauraceae family that is native to North America.[1]

Distribution

S. albidum is found throughout the eastern United States as far west as Texas and Kansas, as well as Ontario, Canada.[1]

Ecology

Habitat

Habitats for S. albidum include forests, old fields, disturbed areas and even fencerows.[3] The tree prefers low pH soils.[1] Specimens of this species have been taken from Moist loam at edges of woods, shaded mixed hardwoods region, fence rows, oak woodland, edge of orange groves, old foeld, river bluff, moist woods, limestone soil site, and a roadbank.[4]

S. albidum exhibited no significant response to agricultural-based soil disturbance in South Carolina or North Carolina coastal plains communities.[5]

S. albidum increased its presence in response to soil disturbance by heavy silvilculture in North Carolina longleaf pine sites. It has shown regrowth in reestablished longleaf sites that were disturbed by these practices.[6]

This species has become absent in response to military training in west Georgia pinelands. It has shown resistance to regrowth in reestablished longleaf pinelands that were disturbed by this activity.[7]

Phenology

S. albidum has been observed to flower in March.[8]

Seed dispersal

This species is thought to be dispersed by consumption by vertebrates.[9]

Fire ecology

Sassafras prefers environments that are subject to spring burns. They will be abundant in understory that is burned in late winter and spring burns.[10] Populations of S. albidum have been known to persist through repeated annual burns.[11][12][13]

Sassafras albidum has been observed to host bug species such as Cedusa sp. (family Derbidae), planthoppers such as Ormenoides venusta (family Flatidae), and leafhoppers from the Cicadellidae family such as Eratoneura ardens, Graphocephala fennahi, G. coccinea, G. teliformis, Typhlocyba sp. and Ormenoides venusta.[14]

The fruit produced by the tree is commonly eaten by animals who in turn disperse the seeds. Such animals include: quail, wild turkeys, kingbirds, crested flycatchers, mockingbirds, sapsuckers, pileated woodpeckers, yellowthroat warblers, and phoebes. Other animals will eat the fruit, bark and wood as well; black bears, beavers, rabbits, and squirrels. Deer will forage in the foliage.[1] This species is a variety of Persea and sassafras that is a primary food for the Palamedes swallowtail caterpillar.[15]

Diseases and parasites

Insects will eat the entire leaves and the plants can develop root rot is they are in an environment with wet clay soil.[1] Laurel wilt impacting sassafras has been recorded in the Atlantic Coastal Plain region that the species is found.[16]

Conservation, cultivation, and restoration

Cultural use

In the early 1800s the plant was used in a variety of treatments. Bronchitis, respiratory and digestive problems were treated with a tea from the root bark, and this same tea was used to slow milk production in nursing mothers, kidney problems, and dysentery. The bark was used as a poultice for treating sore eyes.[17]

The plant was famous for its possible medicinal uses and was used in root teas and gumbo. The bark could be dried and later eaten or then boiled with sugar to make sauce.[18]

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 1.3 1.4 1.5 USDA Plant Database
  2. Korchmal, Arnold & Connie. 1973. A Guide to the Medicinal Plants of the United States. The New York Times Book Company, New York.
  3. Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
  4. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2018. Collectors: Loran Anderson, Kathy Craddock Burks, Gary R. Knight, R.K.Godfrey, Patricia Elliot, Sidney McDaniel, Richard S. Mitchell, Elmar C. Prichard, Lovett Williams Jr., H. Kurz, Gwynn W. Ramsey, H. Larry E. Stripling, Wayne R. Faircloth, M. Garland, Delzie Demaree, Kurt E. Blum, Gary H. Morton, Frank Bowers, Robert. L. Lazor, John Moore, H.A. Wahl, John W. Thieret, Michael Cartrett, R. F. Doren, Clarke Hudson, Norlan C. Henderson, W.J. Taylor, S.B. Jones, States and counties: Florida (Leon, Jefferson, Jackson, Liberty, Volusia, Madison, Washington, Gadsden, Franklin, Wakulla) Georgia (Brooks, Stewart, Thomas), Virginia (Smyth, Giles), Arkansas (Saline, St. Francis), Tennessee (Summer, Campbell, Davidson), West Virginia (Monroe), Louisiana (Tangipahoa, Claiborne, Caddo), North Carolina (Macon, Wake), Mississippi (Covington, Jasper, Pike, Giles), Missouri (McDonald, Iron), Maryland (Anne Arundel), Louisiana (Beauregard, Bienville, Madison), Alabama (Colbert), New Jersey (Weston, Somerset), Pennsylvania (Juniata), Indiana (Huntington, Newton, Huntington)
  5. 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.
  6. Cohen, S., R. Braham, and F. Sanchez. (2004). Seed Bank Viability in Disturbed Longleaf Pine Sites. Restoration Ecology 12(4):503-515.
  7. Dale, V.H., S.C. Beyeler, and B. Jackson. (2002). Understory vegetation indicators of anthropogenic disturbance in longleaf pine forests at Fort Benning, Georgia, USA. Ecological Indicators 1(3):155-170.
  8. Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. www.gilnelson.com/PanFlora/ Accessed: 29 MAY 2018
  9. 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.
  10. Kush, J. S., et al. (1999). "Understory plant community response after 23 years of hardwood control treatments in natural longleaf pine (Pinus palustris) forests." Canadian Journal of Forest Research 29: 1047-1054.
  11. Robertson, K.M. Unpublished data collected from Pebble Hill Fire Plots, Pebble Hill Plantation, Thomasville, Georgia.
  12. Glitzenstein, J. S., D. R. Streng, R. E. Masters, K. M. Robertson and S. M. Hermann 2012. Fire-frequency effects on vegetation in north Florida pinelands: Another look at the long-term Stoddard Fire Research Plots at Tall Timbers Research Station. Forest Ecology and Management 264: 197-209.
  13. Platt, W.J., R. Carter, G. Nelson, W. Baker, S. Hermann, J. Kane, L. Anderson, M. Smith, K. Robertson. 2021. Unpublished species list of Wade Tract old-growth longleaf pine savanna, Thomasville, Georgia.
  14. Discoverlife.org [1]
  15. Spiegel, K. S. and L. M. Leege (2013). "Impacts of laurel wilt disease on redbay (Persea borbonia (L.) Spreng.) population structure and forest communities in the coastal plain of Georgia, USA." Biological Invasions 15(11): 2467-2487.
  16. Mayfield, A. E. and J. L. Hanula (2012). "Effect of Tree Species and End Seal on Attractiveness and Utility of Cut Bolts to the Redbay Ambrosia Beetle and Granulate Ambrosia Beetle (Coleoptera: Curculionidae: Scolytinae)." Journal of Economic Entomology 105(2): 461-470.
  17. Korchmal, Arnold & Connie. 1973. A Guide to the Medicinal Plants of the United States. The New York Times Book Company, New York.
  18. Fernald, et al. 1958. Edible Plants of Eastern North America. Harper and Row Publishers, New York.