Polygonum

Distribution Map: Based on vouchered plant specimens only. View county names by placing the mouse cursor over a particular county.

Contains 15 accepted taxa overall.

Family:	Polygonaceae
Common Name:

Classification

Division	Magnoliophyta - Flowering Plants
Class	Magnoliopsida
Sub Class	Caryophyllidae
Order	Caryophyllales
Family	Polygonaceae
Genus	*Polygonum*

Citation

Citation	**
Basionym:	**
Type:	**

** Not applicable or data not available.

Species

Scientific Name	Common Name	Status
Polygonum achoreum	Blake’s knotweed	Native, Persisting, S4 (State Rank), G5 (Global Rank)
Polygonum articulatum	northern jointweed	Native, Persisting, S4 (State Rank), CoC: 5
Polygonum aviculare
Polygonum aviculare ssp. aviculare	common knotweed	Not Native, Persisting, SNA (State Rank)
Polygonum aviculare ssp. depressum	oval-leaved knotweed	Not Native, Persisting, SNA (State Rank)
Polygonum aviculare ssp. neglectum	narrow-leaved knotweed	Not Native, Persisting, SNA (State Rank), G5 (Global Rank)
Polygonum buxiforme	American knotweed	Native, Persisting, S1S2 (State Rank), G5 (Global Rank)
Polygonum douglasii	Douglas’s knotweed	Native, Persisting, S1S2 (State Rank), G5 (Global Rank), CoC: 8
Polygonum erectum	erect knotweed	Native, Not Persisting, S2S3 (State Rank), G5 (Global Rank), CoC: 10
Polygonum glaucum	seabeach knotweed	Native, Persisting, S3 (State Rank), CoC: 8
Polygonum polycnemoides	Himalayan knotweed	Not Native, Not Persisting, SNA (State Rank)
Polygonum ramosissimum
Polygonum ramosissimum ssp. prolificum	proliferous knotweed	Native, Persisting, S4 (State Rank), G5T4T5 (Global Rank), CoC: 1
Polygonum ramosissimum ssp. ramosissimum	bushy knotweed	Native, Persisting, S4 (State Rank), G5T5 (Global Rank), CoC: 1
Polygonum tenue	pleated-leaved knotweed	Native, Persisting, S3 (State Rank), G5 (Global Rank), CoC: 7

For more information, contact: David Werier or Kyle Webster

Web Development: USF Water Institute

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

Citation Information:

Werier, David, Kyle Webster, Troy Weldy, Andrew Nelson, Richard Mitchell†, and Robert Ingalls†. 2023 New York Flora Atlas. [S. M. Landry and K. N. Campbell (original application development), USF Water Institute. University of South Florida]. New York Flora Association, Albany, New York.

Search Help

Select the criterion by which you wish to search (Scientific name, Genus, Family, etc.) and enter that information into the provided field.

Hint: Correct spelling is necessary for desired results, but because this function is a string search the full name need not be entered. Any correct part of a taxon name can be entered and a choice of the correct one made from the small list of resulting matches.

For example, matching the full name exactly in a Scientific Name search for Piptochaetium avenacioides may be difficult, but strings of either tium aven or avenaci or m avenac or pipto will all result in very small lists of matches. The intended name can then be chosen from any of those lists. Usually, the last letter (or two) of a given genus, a space, and the first few correct letters of the specific epithet will provide a sufficiently short list containing the desired taxon.

A similar example in a Common Name search is Virginia snakeroot. Searching using "snake root" will yield no results due to the extra space, but searching "snake" will generate a short list of plants with the word "snake" in the common name. Furthermore, a search of "Virginia snake" or even "nia snak" yields one result: Virginia snakeroot.

If, after following the above advice, then difficulties are still encountered please use the "browse" feature.

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.