Potamogeton pusillus

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Family:	POTAMOGETONACEAE
Species:	Potamogeton pusillus L.
Common Name:	SMALL PONDWEED
Status:	Native, OBL (NWPL)
Specimen:	View details of USF Herbarium specimens

** Not applicable or data not available.

Classification

Division
Class
Sub Class
Order	ALISMATALES
Family	POTAMOGETONACEAE
Genus	Potamogeton
Species	Potamogeton pusillus L. - SMALL PONDWEED

Citation

Citation	POTAMOGETON PUSILLUS Linnaeus, Sp. Pl. 127. 1753.
Basionym:	**
Type:	"Europe", without data (lectotype: LINN 175.15). Lectotypified by Dandy & G. Taylor, J. Bot. 76: 89-92. 1938.

** Not applicable or data not available.

Source

County	Herbaria	Literature Citation (If Applicable)
Bay	FLAS
Brevard	USF
Charlotte	USF
Citrus	FLAS
Escambia	FLAS
Franklin	FSU
Gadsden	FSU
Hillsborough	USF
Jackson	FSU
Jefferson	FSU
Leon	USF
Liberty	USF
Martin	FLAS
Orange	USF
Palm Beach	FTG
Pinellas	FLAS
Sarasota	USF
Seminole	FLAS
Volusia	USF
Wakulla	USF

Synonyms

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

Synonym	Full Citation	Basionym	Type
Potamogeton berchtoldii	Potamogeton berchtoldii Fieber, in Berchtold, Oekon.-Techn. Fl. Boehm. 2: 277. 1838.
Potamogeton berchtoldii var. tenuissimus	Potamogeton berchtoldii Fieber, var. tenuissimus (Mertens & W. D. J. Koch) Fernald, Rhodora 42: 246. 1940.	BASIONYM: Potamogeton pusillus Linnaeus, var. tenuissimus Mertens & W. D. J. Koch 1823.
Potamogeton panormitanus	Potamogeton panormitanus Bivona-Bernardi, in Bivona-Bernardi f., Nuove Piante 6. 1838.
Potamogeton pusillus subsp. tenuissimus	Potamogeton pusillus Linnaeus, subsp. tenuissimus (Mertens & W. D. J. Koch) R. R. Haynes & Hellquist, Novon 6: 370. 1996.	BASIONYM: Potamogeton pusillus Linnaeus, var. tenuissimus Mertens & W. D. J. Koch 1823.
Potamogeton pusillus var. panormitanus	Potamogeton pusillus Linnaeus, var. panormitanus (Bivona-Bernardi) Morong, Mem. Torrey Bot. Club 3: 46. 1893.	BASIONYM: Potamogeton panormitanus Bivona-Bernardi 1838.
Potamogeton pusillus var. tenuissimus	Potamogeton pusillus Linnaeus, var. tenuissimus Mertens & W. D. J. Koch, in Röhling, Deutschl. Fl. 1: 857. 1823.
Potamogeton pusillus var. typicus	Potamogeton pusillus Linnaeus, var. typicus Fernald, Mem. Amer. Acad. Arts Sci. 17(1): 81. 1932, nom. inadmiss.	BASIONYM: Potamogeton pusillus Linnaeus 1753.
Potamogeton pusillus var. vulgaris	Potamogeton pusillus Linnaeus, var. vulgaris Fries, Novit. Fl. Suec., ed. 2. 49. 1828, nom. inadmiss.	BASIONYM: Potamogeton pusillus Linnaeus 1753.
Potamogeton tenuissimus	Potamogeton tenuissimus (Mertens & W. D. J. Koch) Reichenbach, Icon. Fl. Germ. Helv. 7: 14. 1845.	BASIONYM: Potamogeton pusillus Linnaeus, var. tenuissimus Mertens & W. D. J. Koch 1823.
Spirillus pusillus	Spirillus pusillus (Linnaeus) Nieuwland, Amer. Midl. Naturalist 3: 18. 1913.	BASIONYM: Potamogeton pusillus Linnaeus 1753.
Potamogeton aschersonii	Potamogeton aschersonii A. Bennett, J. Bot. 31: 294. 1893.		TYPE: BRAZIL: Rio de Janeiro: Rio de Janeiro, Lac de la Tijuca, 27 Feb 1872, Glaziou 6460 (lectotype: P; isolectotypes: C, S). Lectotypified by R. R. Haynes & Holm-Nielsen, Fl. Neotrop. 85: 14. 2003.
Potamogeton berchtoldii var. acuminatus	Potamogeton berchtoldii Fieber, var. acuminatus Fieber, in Berchtold, Oekon- Techn. Fl. Boehm. 2: 277. 1838.
Potamogeton berchtoldii var. colpophilus	Potamogeton berchtoldii Fieber, var. colpophilus (Fernald) Fernald, Rhodora 42: 246. 1940.	BASIONYM: Potamogeton pusillus Linnaeus, var. colpophilus Fernald 1932.
Potamogeton berchtoldii var. lacunatus	Potamogeton berchtoldii Fieber, var. lacunatus (Hagström) Fernald, Rhodora 42: 246. 1940.	BASIONYM: Potamogeton lacunatus Hagström 1916.
Potamogeton berchtoldii var. mucronatus	Potamogeton berchtoldii Fieber, var. mucronatus Fieber, in Berchtold, Oekon.- Techn. Fl. Boehm. 2: 277. 1838.
Potamogeton berchtoldii var. polyphyllus	Potamogeton berchtoldii Fieber, var. polyphyllus (Morong) Fernald, Rhodora 42: 246. 1940.	BASIONYM: Potamogeton pusillus Linnaeus, var. polyphyllus Morong 1880.
Potamogeton berteroanus	Potamogeton berteroanus Philippi, Linnaea 30: 200. 1859.		TYPE: CHILE: O'Higgins: Tagua Tagua, Rancagua, s.d., Bertero s.n. (holotype: SGO; isotypes: GH, P).
Potamogeton lacunatus	Potamogeton lacunatus Hagström, Kongl. Svenska Vetenskapsakad. Handl. 55(5): 120. 1916.		TYPE: MASSACHUSETTS: Middlesex Co.: Ashland, in Lake Wauhakune, s.d., Morong s.n. (lectotype: UPS). Lectotypified by R. R. Haynes, Rhodora 76: 634. 1974.
Potamogeton panormitanus var. minor	Potamogeton panormitanus Bivona-Bernardi, var. minor Bivona-Bernardi, in Bivona-Bernardi f., Nuove Piante 6. 1838.
Potamogeton pusillus subvar. interruptus	Potamogeton pusillus Linnaeus, subvar. interruptus Robbins, in S. Watson, Botany (Fortieth Parallel) 338. 1871.		TYPE: UTAH: Wasatch Co.: Parleys Park in the Wasatch, Jul 1869, Watson 1137 (holotype: NY; isotypes: GH, US, YU).
Potamogeton pusillus var. acuminatus	Potamogeton pusillus Linnaeus, var. acuminatus (Fieber) Graebner, in Engler, Pflanzenr. 4(Heft 31): 115. 1907.	BASIONYM: Potamogeton berchtoldii Fieber, var. acuminatus Fieber 1838.
Potamogeton pusillus var. capitatus	Potamogeton pusillus Linnaeus, var. capitatus A. Bennett, J. Bot. 39: 201. 1901, nom. illegit.	BASIONYM: Potamogeton pusillus Linnaeus, var. elongatus A. Bennett 1890.
Potamogeton pusillus var. colpophilus	Potamogeton pusillus Linnaeus, var. colpophilus Fernald, Mem. Amer. Acad. Arts 17(1): 90. 1932.		TYPE: CANADA: Quebec: Gaspe Co.: Near the mouth of Dartmouth River, s.d., Collins et al. s.n. (holotype: GH; isotypes: CAN, NY, US).
Potamogeton pusillus var. cuspidatus	Potamogeton pusillus Linnaeus, var. cuspidatus G. Fisher, Ber. Bayer. Bot. Ges. 11: 116. 1907.
Potamogeton pusillus var. elongatus	Potamogeton pusillus Linnaeus, var. elongatus A. Bennett, in Macoun, Cat. Canad. Pl. 5: 371. 1890; J. Bot. 29: 151. 1891.		TYPE: CANADA: British Columbia: Spullamasheen River at and above Enderby, s.d., Macoun 4140 (holotype: K?; isotype: GH).
Potamogeton pusillus var. lacunatus	Potamogeton pusillus Linnaeus, var. lacunatus (Hagström) Fernald, Mem. Amer. Acad. Arts 17(1): 85. 1932.	BASIONYM: Potamogeton lacunatus Hagström 1916.
Potamogeton pusillus var. minor	Potamogeton pusillus Linnaeus, var. minor (Bivona-Bernardi) Fernald, Rhodora 50: 154. 1948.	BASIONYM: Potamogeton panormitanus Bivona-Bernardi, var. minor Bivona- Bernardi 1838.
Potamogeton pusillus var. mucronatus	Potamogeton pusillus Linnaeus, var. mucronatus (Fieber) Graebner, in Engler, Pflanzenr. 4(Heft 31): 115. 1907.	BASIONYM: Potamogeton berchtoldii Fieber, var. mucronatus Fieber 1838.
Potamogeton pusillus var. polyphyllus	Potamogeton pusillus Linnaeus, var. polyphyllus Morong, Bot. Gaz. 5: 51. 1880.		TYPE: MASSACHUSETTS: Middlesex Co.: South Natick, 29 Aug 1879, Morong s.n. (holotype: NY; isotypes: BM, GH, PH, S.
Potamogeton tenuifolius	Potamogeton tenuifolius F. Philippi, Anales Mus. Nac. Santiago de Chile 1891: 95. 1891.		TYPE: CHILE: Santiago: Del parque Consinto, s.d., Philippi s.n. (holotype: SGO).
Potamogeton turionifera forma mucronulatus	Potamogeton turionifera Hagström, forma mucronulatus Hagström, Kongl. Svenska Vetenskapsakad. Handl. 55(5): 91. 1916.		TYPE: CANADA: Ontario: Brighams Creek, Ottawa, s.d., Macoun s.n. holotype: C; isotypes: C, CAN, GH).
Potamogeton turionifera forma tenuis	Potamogeton turionifera Hagström, forma tenuis Hagström, Kongl. Svenska Vetenskapsakad. Handl. 55(5): 91. 1916.		TYPE: CANADA: Ontario: Algonquin Park, Cache Lake, s.d., Macoun s.n. (lectotype: C; isolectotypes: C, CAN, GH). Lectotypified by R. R. Haynes, Rhodora 76: 634. 1974.

Specimens

Country	State	County	Date	Specimen
USA	Florida	Leon Co.	06 Jul 1956	P. L. Redfearn 2567
USA	Florida	Liberty Co.	22 Sep 1957	R. K. Godfrey 55204
USA	Florida	Wakulla Co.	25 May 1963	R. K. Godfrey 62837
USA	Florida	Volusia Co.	31 Dec 2005	J. M. Kunzer 1271
USA	Florida	Charlotte Co.	21 Mar 1980	R. P. Sauleda 3385
USA	Florida	Brevard Co.	23 Jun 1971	R. Hestand s.n.
USA	Florida	Orange Co.	10 Sep 1971	D. Auth s.n.
USA	Florida	Sarasota Co.	26 Mar 2002	C. Becker MWSR036
USA	South Carolina	Williamsburg Co.	16 Jun 1982	C. A. Aulbach-Smith 2248a
USA	North Carolina	Carteret Co.	27 Jun 1951	A. E. Radford 5867
USA	North Carolina	Craven Co.	27 Jun 1951	A. E. Radford 5856
USA	Mississippi	Forrest Co.	21 Mar 1973	K. E. Rogers 9094
USA	North Carolina	Gates Co.	04 Oct 1976	P. Gammon s.n.
USA	Alabama	Cherokee Co.	16 May 1981	R. R. Haynes 8451
USA	Texas	Harrison Co.	10 May 1962	D. S. Correll 25220
USA	Nebraska	Douglas Co.	01 Jul 1946	W. B. Kiener 20996
USA	Indiana	Jay Co.	17 Jul 2014	A. R. Franck 3425
USA	Oklahoma	Payne Co.	09 Jun 1969	U. T. Waterfall 17439
USA	Minnesota	Becker Co.	16 Jul 1997	V. E. McNeilus 97-4 P
USA	Oregon	Harney Co.	08 Aug 1956	A. N. Steward 7230
USA	Wisconsin	Sawyer Co.	13 Aug 1986	B. F. Hansen 11218
USA	California	Humboldt Co.	12 Sep 1938	S. K. Harris s.n.
USA	Iowa	Dickinson Co.	13 Jul 1961	R. F. Thorne 30281
USA	Ohio	Ottawa Co.	Jul 1935	E. S. Ford 228
USA	Florida	Hillsborough Co.	29 Aug 2016	S. Dickman 1639

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

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Associated Ecological Communities

View a List of All Ecological Communities

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

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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.

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