• NSF NEON | Open Data to Understand our Ecosystems
  • Biorepository Data Portal

  • Home
  • Search
    • Sample search
    • Map search
    • Dynamic Species List
    • Taxonomic Explorer
  • Images
    • Image Browser
    • Image Search
  • Datasets
    • Research Datasets and Special Collections
    • Carabidae Checklists with Keys
    • Checklist: Research Sites - Invertebrates
    • Checklist: Research Sites - Plants
    • Checklist: Research Sites - Vertebrates
  • Sample Use
    • Sample Use Policy
    • Sample Request
    • Sample Archival Request
    • Data Usage Policy
    • Dataset Publishing
  • Additional Information
    • Tutorials and Help
    • Biorepository Staff
    • About NEON
    • NEON Data Portal
    • ASU Biocollections
    • About Symbiota
  • Getting Started
Login New Account Sitemap
Persicaria glabra (Willd.) Gomez de la Maza  

No occurrences found

Family: Polygonaceae
denseflower knotweed, more...spotted ladysthumb, tapertip smartweed
[Persicaria densiflora (Meisn.) Moldenke, morePersicaria portoricensis (Bertero ex Small) Small, Polygonum acre Sieber ex Meisn., Polygonum acuminatum Meisn., Polygonum densiflorum Meisn., Polygonum glabrum Willd., Polygonum persicaria Wall., Polygonum portoricense Bertero ex Endl.]
Persicaria glabra image
Max Licher
  • FNA
  • Gleason & Cronquist
  • Resources
Harold R. Hinds+, Craig C. Freeman in Flora of North America (vol. 5)
Plants perennial, 3-15 dm; roots also often arising from proximal nodes; rhizomes present. Stems decumbent to erect, usually branched distally, without noticeable ribs, glabrous or, rarely, pubescent distally, sometimes glandular-punctate. Leaves: ocrea light brown, cylindric, 12-23 mm, chartaceous, base inflated, margins truncate, eciliate, surface glabrous, usually obscurely glandular-punctate; petiole 0.2-2 cm, scabrous; blade without dark triangular or lunate blotch adaxially, lanceolate, (10-)15-30 × (1.5-)2-5.4 cm, base tapered, margins glabrous or antrorsely strigose, apex acute to acuminate, faces glabrous or scabrous along midveins, sometimes glandular-punctate. Inflorescences mostly terminal, sometimes also axillary, erect to slightly nodding, usually uninterrupted, 30-100 × 5-9 mm; peduncle 10-50 mm, glabrous or scabrid, glandular-punctate; ocreolae usually overlapping, margins eciliate. Pedicels erect to spreading, 2-5 mm. Flowers (1-)3-8 per ocreate fascicle, homostylous; perianth greenish white to white or pink, glabrous, not glandular-puncate or glandular-punctate with punctae ± uniformly distributed, scarcely accrescent; tepals 5, connate ca. 1/ 3 their length, obovate, 3-3.6 mm, veins not prominent, not anchor shaped, margins entire, apex obtuse to rounded; stamens 5-7, included; anthers pink or red, ovate; styles 2, connate proximally. Achenes included, dark brown to brownish black, biconvex, 2-2.2 × 1.3-1.6 mm, shiny, smooth. Flowering Aug-Nov. Swamps, wet thickets, marshy shores, frequently in water, mostly on coastal plain of e North America; 0-300; Ala., Ark., Del., Fla., Ga., Ky., La., Md., Miss., Mo., N.J., N.C., S.C., Tenn., Tex., Va.; Central America; South America; Asia; ne Africa; Pacific Islands (Hawaii, Philippines). American plants here included in Persicaria glabra often have been treated as distinct and called P. densiflora. The morphological differences between them and Asian and Pacific P. glabra are minor. Regional tendencies exist but do not appear sufficient to warrant separation of the species (K. L. Wilson 1990b).

An infusion made from pounded whole plants was used by the Hawaiians as a blood medicine (D. E. Moerman 1998).

Vascular plants of NE US and adjacent Canada
Rhizomatous perennial to 1.5 m, often rooting from the swollen nodes; lvs lanceolate, acuminate, mostly 10-25 נ2-5 cm; ocreae smooth, entire or nearly so, not fringed; peduncles strigulose; racemes slender, to 10 cm; ocreolae obconic, truncate, scarcely oblique, commonly overlapping; perianth white, 2.5-3 mm, enlarging to 3-4 mm, conspicuously surpassing the fr, this black, 2-2.5 mm, 70-100% as wide, strongly biconvex. Swamps and shallow water of the coastal plain; s. N.J. to Fla. and Tex., n. in the interior to s. Mo.; W.I. and S. Amer. (Persicaria portoricensis)

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Persicaria glabra
Open Interactive Map
Persicaria glabra image
Max Licher
Click to Display
2 Total Images
NSF NEON | Open Data to Understand our Ecosystems The National Ecological Observatory Network is a major facility fully funded by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.