Polygonum parryi

Species of flowering plant

Polygonum parryi
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Polygonaceae
Genus: Polygonum
Species:
P. parryi
Binomial name
Polygonum parryi
Greene 1891

Polygonum parryi is a species of flowering plant in the knotweed family known by the common names Parry's knotweed and prickly knotweed.[1] It is native to the western United States from Washington to California, where it grows in several types of moist, open habitat in mountainous and coastal areas.[2][3]

Description

Polygonum parryi is a small annual herb forming mats or cushions of short, angled stems growing erect up to 7 or 8 centimeters (2.8–3.2 inches) in height. The greenish brown stems are lined densely and evenly with linear, spine-tipped leaves. The lowest leaves are longest, reaching up to 2 centimeters (0.8 inches) long, while leaves near the branch tips are small and scale-like. Each leaf has a thin, wide stipule which forms a fringed, fibrous ochrea around the base of the leaf. White flowers less than 2 millimeters (0.08 inches) wide occur in the leaf axils.[1]

References

  1. ^ a b Flora of North America, Polygonum parryi Greene, 1881. Parry's or prickly knotweed
  2. ^ Biota of North America Program 2014 county distribution map
  3. ^ Calflora taxon report, University of California, Polygonum parryi E. Greene, Parry's knotweed

External links

  • Jepson Manual Treatment
  • Calphotos Photo gallery, University of California
Taxon identifiers
Polygonum parryi


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