Dense-flowered Knotweed in Charles Co., Maryland (9/1/2009). Per Kerry: "It lacks bristles on the ocreae and has these large, forked racemes of flowers."
Photo by
Kerry Wixted
MBP List
Dense-flowered Knotweed blooming in Queen Anne's Co., Maryland (8/25/2013).
Map Snapshot
15 Records
Status
Smooth Knotweed may be found in local floras as either Persicaria glabra or Persicaria densiflora. Some authors consider these synonyms (e.g., Knapp and Naczi 2021) while others separate the two species and recognize Persicaria glabra as an Old World species and Persicaria densiflora as a New World species (e.g., Weakley 2022). Consequently, Weakley (2022) prefers Persicaria densiflora for the species in the Southeast and Maryland.
Citations
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Dense-flowered Knotweed in Charles Co., Maryland (9/1/2009). Per Kerry: "It lacks bristles on the ocreae and has these large, forked racemes of flowers."
Media by
Kerry Wixted.
Dense-flowered Knotweed blooming in Queen Anne's Co., Maryland (8/25/2013).
View Record Details
Media by
Jim Brighton.
Source: Wikipedia
| Persicaria glabra | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Polygonaceae |
| Genus: | Persicaria |
| Species: | P. glabra
|
| Binomial name | |
| Persicaria glabra (Willd.)M.Gómez
| |
| Synonyms | |
| |
Persicaria glabra, also known as denseflower knotweed, is a species of flowering plant native to North America and Eurasia.[1]
Description
[edit]It is similar in appearance to P. longiseta and P. lapathifolia. The plant is a medium-sized annual herb with red, swollen joints and lanceolate leaves. The inflorescence is a dense raceme of small pink or white flowers, the fruit a flattened black nut.
References
[edit]
Wikimedia Commons has media related to Persicaria glabra.
- ^ Kim, Sang-Tae; Donoghue, Michael J. (1 September 2008). "Incongruence between cpDNA and nrITS trees indicates extensive hybridization within Eupersicaria (Polygonaceae)". American Journal of Botany. 95 (9): 1122–1135. Bibcode:2008AmJB...95.1122K. doi:10.3732/ajb.0700008. ISSN 0002-9122. PMID 21632431.
External links
[edit]
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