Dichanthelium boscii

Distribution Map: Based on vouchered plant specimens from wild populations. Cultivated occurrences are not mapped. View county names by placing the cursor over the map.

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Family:	POACEAE
Species:	Dichanthelium boscii (Poir.)Gould & C.A.Clark
Common Name:	BOSC'S WITCHGRASS
Status:	Native
Specimen:	View details of USF Herbarium specimens

** Not applicable or data not available.

Classification

Division
Class
Sub Class
Order	POALES
Family	POACEAE
Genus	Dichanthelium
Species	Dichanthelium boscii (Poir.)Gould & C.A.Clark - BOSC'S WITCHGRASS

Citation

Citation	DICHANTHELIUM BOSCII (Poiret) Gould & C. A. Clark, Ann. Missouri Bot. Gard. 65: 1101. 1978.
Basionym:	Panicum boscii Poiret 1816.
Type:	SOUTH CAROLINA: Without data, Bosc s.n. (lectotype: P; isotype: US fragm). Lectotypified by Hitchcock & Chase, Contr. U.S. Natl. Herb. 15: 317. 1910.

** Not applicable or data not available.

Source

County	Herbaria	Literature Citation (If Applicable)
Alachua	USF
Calhoun	FSU
Columbia	FLAS
Escambia	MOR
Gadsden	USF
Jackson	USF
Jefferson	FSU
Leon	USF
Levy	USF
Liberty	FLAS
Nassau	USF
Wakulla	FSU
Walton	FLAS
Washington	FSU

Synonyms

– Denotes synonyms that are applicable to the state. Show these synonyms only

Synonym	Full Citation	Basionym	Type
Panicum boscii	Panicum boscii Poiret, in Lamarck, Encycl., Suppl. 4: 278. 1816.		TYPE: SOUTH CAROLINA: Without data, Bosc s.n. (lectotype: P; isotype: US fragm). Lectotypified by Hitchcock & Chase, Contr. U.S. Natl. Herb. 15: 317. 1910.
Panicum boscii var. molle	Panicum boscii Poiret, var. molle (Vasey) Hitchcock & Chase, in B. L. Robinson, Rhodora 10: 64. 1908.	BASIONYM: Panicum latifolium Linnaeus, var. molle Vasey 1889.
Panicum latifolium var. molle	Panicum latifolium Linnaeus, var. molle Vasey, Bull. Div. Agrostol., U.S.D.A. 8: 34. 1889.		TYPE: DISTRICT OF COLUMBIA: Without data, Ward s.n. (holotype: US).
Panicum porterianum	Panicum porterianum Nash, Bull. Torrey Bot. Club 22: 420. 1895, nom. illegit.	BASIONYM: Panicum waltheri Poiret 1816, non P. walteri Pursh 1814.
Panicum pubifolium	Panicum pubifolium Nash, Bull. Torrey Bot. Club 26: 577. 1899.	BASIONYM: Panicum latifolium Linnaeus, var. molle Vasey 1889.
Panicum waltheri	Panicum waltheri Poiret, in Lamarck, Encycl., Suppl. 4: 282. 1816, non P. walteri Pursh 1814.		TYPE: "in pratis sylvestris Virginiae Carolinae", s.d., Michaux s.n. (lectotype: P-M). Lectotypified by Hitchcock & Chase, Contr. U.S. Natl. Herb. 15: 317. 1910.
Panicum waltheri var. molle	Panicum waltheri Poiret, var. molle (Vasey) Porter, Bull. Torrey Bot. Club 20: 194. 1893.	BASIONYM: Panicum latifolium Linnaeus, var. molle Vasey 1889.
Panicum latifolium var. australe	Panicum latifolium Linnaeus, var. australe Vasey, Bull. Div. Agrostol., U.S.D.A. 8: 34. 1889.		TYPE: ALABAMA: Clark Co.: Thomasville, 16 Apr 1888, Mohr s.n. (holotype: US).

Specimens

Country	State	County	Date	Specimen	Notes
USA	Florida	Jackson Co.	27 Apr 2005	W. K. Taylor s.n.
USA	Florida	Alachua Co.	24 May 2005	W. K. Taylor s.n.
USA	Florida	Nassau Co.	18 Oct 1991	S. L. Orzell 18526
USA	Florida	Leon Co.	28 Mar 1955	R. K. Godfrey 53073
USA	Florida	Leon Co.	07 May 1957	R. Kral 4716
USA	Florida	Levy Co.	29 Apr 1959	G. R. Cooley 6654
USA	Florida	Gadsden Co.	31 Mar 1995	E. L. Bridges 23543
USA	Alabama	Lee Co.	23 May 1963	K. E. Rogers 34209
USA	Tennessee	Shelby Co.	12 May 1920	E. J. Palmer 17445
USA	North Carolina	Avery Co.	24 Jul 1958	H. E. Ahles 47527
USA	Louisiana	Natchitoches Par.	27 Jun 1959	M. G. Lelong
USA	North Carolina	Ashe Co.	31 May 1958	A. E. Radford 34433
USA	Alabama	Baldwin Co.	20 May 1981	G. Wilhelm 8969
USA	Mississippi	Lee Co.	08 Jun 1967	L. C. Temple 5193
USA	Mississippi	Wilkinson Co.	15 Jun 1980	L. M. McCook 649
USA	Mississippi	Monroe Co.	12 Jun 1956	J. D. Ray, Jr. 6273
USA	Kentucky	Madison Co.	13 Jun 1981	D. D. Taylor 322
USA	Mississippi	Forrest Co.	20 Jul 1952	J. D. Ray, Jr. 2613
USA	Mississippi	Tishomingo Co.	14 Jun 1956	J. D. Ray, Jr. 6354
USA	Georgia	Harris Co.	09 Jun 1972	S. B. Jones 22064
USA	Louisiana	Grant Par.	10 Aug 1976	K. A. Vincent 108
USA	Georgia	Chatham Co.	20 Apr 1959	G. R. Swank 590
USA	Georgia	Rabun Co.	03 Jul 1960	G. R. Swank 919
USA	Tennessee	Blount Co.	08 Aug 1948	M. H. Berry s.n.
USA	Kentucky	Madison Co.	02 Jun 1959	J. Grossman 101	"Panic Grass".
USA	Virginia	Norfolk Co.	10 Jun 1916	A. Chase 540
USA	Virginia	Alexandria Co.	13 Sep 1905	A. S. Hitchcock 199
USA	West Virginia	Upshur Co.	05 Oct 1958	G. B. Rossbach 1287
USA	New Jersey	Sussex Co.	16 Jul 1960	J. Patman s.n.
USA	Virginia	Alexandria Co.	01 Jun 1905	A. S. Hitchcock 198
USA	Ohio	Warren Co.	12 Jul 1989	T. G. Lammers 6779
USA	Kentucky	Caldwell Co.	03 Oct 1980	L. R. Phillippe 5875
USA	Maryland	Allegany Co.	28 May 2006	W. D. Longbottom 7374
USA	Virginia	Montgomery Co.	08 Aug 1994	T. Bradley 26191
USA	Illinois	Union Co.	13 Aug 1999	S. R. Hill 31935
USA	Illinois	Johnson Co.	08 Jul 1996	S. R. Hill 28376
USA	Virginia	Princess Anne Co.	16 Jun 1935	M. L. Fernald 4545
USA	Missouri	Jefferson Co.	19 Jun 1978	G. Davidse 1
USA	Virginia	Rappahannock Co.	05 Sep 1993	T. Bradley 25669
USA	District of Columbia		21 May 1905	A. S. Hitchcock 1874
USA	New Jersey	Warren Co.	12 Jun 1921	L. Griscom 10618
USA	Virginia	Arlington Co.	21 Aug 1928	S. F. Blake 14172
USA	Kentucky	Madison Co.	29 May 1982	D. D. Taylor 1446a
USA	Virginia	Giles Co.	23 Jul 1967	G. H. Morton 1569
USA	Kentucky	Harlan Co.	Aug 1893	T. H. Kearney, Jr. 258

Listed Status: Florida

Listed Status:	(Florida):Source - Plants in the Preservation of Native Flora of Florida Act. Chapter 5B-40, Florida Administrative Code. 1998, amended.
Endangered:	A species of plants native to the state that are in imminent danger of extinction within the state, the survival of which is unlikely if the causes of a decline in the number of plants continue, and includes all species determined to be endangered or threatened pursuant to the Federal Endangered Species Act of 1973, as amended.
Threatened:	Listed as Threatened Plants in the Preservation of Native Flora of Florida Act. Defined as species of plants native to the state that are in rapid decline in the number of plants within the state, but which have not so decreased in such number as to cause them to be endangered.

Listed Status: US

Listed Status: US	(U.S.) Source - List of Endangered and Threatened Wildlife and Plants under the provisions of the Endangered Species Act of 1973, as amended.
Endangered:	Any species which is in danger of extinction throughout all or a significant portion of its range.
Threatened:	Any species which is likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range.

WAP: Wetland AssessmentProcedure

Wetland Assessment Procedure (WAP): Source - Southwest Florida Water Management District, Wetland Assessment Procedure Instruction Manual for Isolated Wetlands (March 2005).

AD:	Adaptive Species. Plant species designated as FAC or Upland by DEP, but commonly seen in the transition zone in limited numbers.
D:	Deep Species. Plant species commonly found in the deep zone, and designated either FAC or OBL by DEP.
OD:	Outer Deep Species. Plant species commonly found in the outer deep zone, and designated either FACW or OBL by DEP.
T:	Transition Species. Plant species commonly found in the transition zone, and designated either FACW or OBL by DEP.
U:	Upland Species. Plant species that are not expected to be seen in wetlands.

ANY - WAP critieria is not taken into consideration
Yes - Show results with WAP designations
No - Show results without WAP designations

FISC: Florida Invasive Species Council

FISC:

Source - Florida Invasive Species Council's 2017 List of Florida's Most Invasive Species

Category I - Species that are invading and disrupting native plant communities in Florida. This definition does not rely on the economic severity or geographic range of the problem, but on the documented ecological damage caused.

Category II - Species that have shown a potential to disrupt native plant communities. These species may become ranked as Category I, but have not yet demonstrated disruption of natural Florida communities.

DEP: Department of Environmental Protection

Wetland Status, Department of Environmental Regulation (DEP): Source - Delineation of the Landward Extent of Wetlands and Surface Waters, Chapter 62-340, Florida Administrative Code. 1994.

OBL:	Obligate wetland. Occurs almost always under natural conditions in wetlands.
FACW:	Facultative Wetland. Usually occurs in wetlands, but occasionally found in non-wetlands
FAC:	Facultative. equally likely to occur in wetlands or non-wetlands.

NWPL: National Wetland Plant List

National Wetland Plant List (NWPL): Source - Lichvar, R.W., M. Butterwick, N.C. Melvin, and W.N. Kirchner. 2014. The National Wetland Plant List: 2014 Update of Wetland Ratings. Phytoneuron 2014-41: 1-42.

OBL:	Obligate Wetland. Occurs almost always (estimated probability 99%) under natural conditions in wetlands.
FACW:	Facultative Wetland. Usually occurs in wetlands (estimated probability 67%-99%), but occasionally found in non-wetlands.
FAC:	Facultative. Equally likely to occur in wetlands or non-wetlands (estimated probability 34%-66%).
FACU:	Facultative Upland. Usually occurs in non-wetlands (estimated probability 67%-99%), but occasionally found in wetlands (estimated probability 1%-33%).
UPL:	Obligate Upland. Occurs in wetlands in another region, but occurs almost always (estimated probability 99%) under natural conditions in non-wetlands in the regions specified.

Persisting

Identifying species that appear as waifs or only periodically appear in the flora for a few seasons.

Any - Persisting critieria is not taken into consideration
Yes - Show results with a Persisting value of Y
No - Show results without Persisting value of N

Duration

Annual:	Plants that perform their entire lifecycle within a single growing season. All roots, stems, and leaves die at the end of the growing season. Over wintering seeds allow the next generation to appear.
Biennial:	A plant that is typically vegetative its first year and blooms the following season. Once it has bloomed and set seed, the plant dies. Garlic mustard is an example of a biennial.
Perennial:	These plants live for three or more seasons. Many perennials may not be mature enough to bloom during its first year. Perennial wildflowers re-grow each season from overwinter root material.

Category

Vascular:	Any of various plants that have the vascular tissues xylem and phloem. The vascular plants include all seed-bearing plants (the gymnosperms and angiosperms) and the pteridophytes (including the ferns, lycophytes, and horsetails). Also called tracheophyte.
Bryophyte:	A large group of seedless green plants including the mosses, liverworts, and hornworts. Bryophytes lack the specialized tissues xylem and phloem that circulate water and dissolved nutrients in the vascular plants. Bryophytes generally live on land but are mostly found in moist environments, for they have free-swimming sperm that require water for transport. In contrast to the vascular plants, the gametophyte (haploid) generation of bryophytes constitutes the larger plant form, while the small sporophyte (diploid) generation grows on or within the gametophyte and depends upon it for nutrition.
Lichen:	The mutualistic symbiotic association of a fungus with an alga or a cyanobacterium, or both. The fungal component of a lichen absorbs water and nutrients from the surroundings and provides a suitable environment for the alga or cyanobacterium. These live protected among the dense fungal hyphae and produce carbohydrates for the fungus by photosynthesis. Owing to this partnership, lichens can thrive in harsh environments such as mountaintops and polar regions. The more familiar lichens grow slowly as crusty patches, but lichens are found in a variety of forms, such as the tall, plantlike reindeer moss. The association between the different organisms in a lichen is so close that lichens are routinely referred to as a single organism, and scientists classify lichens using the name of the fungal component.

(Definitions from: American Heritage Science Dictionary)

Growth Habit

Intro paragraph to be provided by New York.

Vine:	DESCRIPTION TO BE PROVIDED BY NEW YORK.
Shrub:	DESCRIPTION TO BE PROVIDED BY NEW YORK.
Tree:	DESCRIPTION TO BE PROVIDED BY NEW YORK.
Et cetera:	DESCRIPTION TO BE PROVIDED BY NEW YORK.

State Rank

This numeric rank provides the relative rarity for each species based on a scale from 1 (very rare) to 5 (common). These ranks carry no legal status.

S1 - Typically 5 or fewer occurrences, very few remaining individuals, acres, or miles of stream, or some factor of its biology making it especially vulnerable in the state.
S2 - Typically 6 to 20 occurrences, few remaining individuals, acres, or miles of stream, or factors demonstrably making it very vulnerable in the state.
S3 - Typically 21 to 100 occurrences, limited acreage, or miles of stream in the state.
S4 - Apparently secure in the state.
S5 - Demonstrably secure in the state.
SE - State exotic or non-native.
SH - Historically known from the state, but not seen in the past 15 years.
SNA - Species for which a rank is not applicable. This is mainly those species which are now excluded from flora for various reasons.
SNR - Not yet ranked.
SX - Apparently extirpated from the state.

Global Rank

Each species' global rank is determined by NatureServe. These ranks carry no legal weight. The global rank reflects the species worldwide rarity.

G1 - Critically imperiled globally because of extreme rarity (5 or fewer occurrences), or very few remaining acres, or miles of stream) or especially vulnerable to extinction because of some factor of its biology.
G2 - Imperiled globally because of rarity (6 - 20 occurrences, or few remaining acres, or miles of stream) or very vulnerable to extinction throughout its range because of other factors.
G3 - Imperiled globally because of rarity (6 - 20 occurrences, or few remaining acres, or miles of stream) or very vulnerable to extinction throughout its range because of other factors.
G4 - Imperiled globally because of rarity (6 - 20 occurrences, or few remaining acres, or miles of stream) or very vulnerable to extinction throughout its range because of other factors.
G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
GH - Historically known, with the expectation that it might be rediscovered.
GNA - Species for which a rank is not applicable. NatureServe does not typically rank hybrid species.
GNR - Not yet ranked.
GX - Species believed to be extinct.

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Filter by County - Counties to Exclude - ANY versus ALL

Any - An Any search will combine the list of counties to exclude with a Boolean Or. Plant species returned will not be found within at least one of the selected counties.
All - An All search will combine the list of counties to exclude with a Boolean And. Plant species returned will not be found within any of the selected counties.

Associated Ecological Communities

View a List of All Ecological Communities

For more information, contact: Richard Wunderlin or Bruce Hansen, Alan Franck, or Karla Alvarado

Web Development: USF Water Institute

A member of the University of South Florida family of PlantAtlas.org websites

Citation Information:

Wunderlin, R. P., B. F. Hansen, A. R. Franck, and F. B. Essig. 2024. Atlas of Florida Plants (http://florida.plantatlas.usf.edu/). [S. M. Landry and K. N. Campbell (application development), USF Water Institute.] Institute for Systematic Botany, University of South Florida, Tampa.

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Definition: Vouchered Specimen

A voucher specimen is a pressed and thoroughly dried plant sample deposited in a herbarium, and is intended to be a permanent record supporting research purposes. A voucher may be a record of a plant's occurrence in a particular area, or a specific example of a plant used in a scientific investigation.

Proper vouchers display all the necessary attributes for complete identification of the plant, and are to be accompanied by accurate locality, habitat, collection time, and collector data.

Only plant populations vouchered by specimens deposited in Index Herbariorum http://sweetgum.nybg.org/science/ih/ recognized herbaria are represented on this map.