Status:
valid
Authors:
Greene
Source:
cmp
Year:
1885
Citation Micro:
Bull. Calif. Acad. Sci. 1: 125 (1885)
WFO Identifier:
wfo-0000489508
Common Names
- Polygonum Douglasii
- Douglas's Polygonum
- Douglasii Polygonum
Synonyms
- Polygonum douglasii latifolium (Engelm.) Greene [unknown]
- Polygonum douglasii douglasii [unknown]
- Polygonum tenue commune Engelm. [unknown]
- Polygonum tenue latifolium Engelm. [unknown]
- Polygonum montanum (Small) Greene [unknown]
Description
Polygonum douglasii (also called Douglas Knotweed, among many other common names) is a species of herbaceous perennial plant native to North America. It has a clumping growth habit with long, slender stems and small, white flowers. The leaves are lance-shaped and have a pointed tip. Polygonum douglasii is found in moist, shady areas and is often used as an ornamental plant.
Uses & Benefits
Polygonum douglasii is used as an ornamental plant in gardens and as a houseplant. It is also used in traditional medicine for the treatment of various ailments.
Cultivars, Varieties & Sub-species
Polygonum douglasii sub. johnstonii (Munz) J.C.Hickman
Polygonum douglasii sub. engelmannii (Greene) Kartesz & Gandhi
Polygonum douglasii sub. austiniae (Greene) A.E.Murray
Polygonum douglasii var. microspermum (Engelm.) Dorn
Flower, Seeds and Seedlings
The flowers of Polygonum douglasii are small and white. The seeds are small and black. The seedlings are small and have a single pair of leaves.
Cultivation and Propagation
Polygonum douglasii is a perennial herb that can reach up to 1 m in height. It prefers a sunny position in well-drained soil. Propagation is by seed or division of the clumps.
Where to Find Polygonum douglasii
Polygonum douglasii is native to western North America. It can be found in the states of California, Oregon, and Washington.
Polygonum douglasii FAQ
What is the scientific name of Polygonum douglasii?
Polygonum douglasii
What is the common name of Polygonum douglasii?
Douglas' Knotweed
Where is Polygonum douglasii native to?
North America
Species in the Polygonum genus
Polygonum icaricum,
Polygonum idaeum,
Polygonum albanicum,
Polygonum arenarium,
Polygonum arenastrum,
Polygonum acetosum,
Polygonum salsugineum,
Polygonum scoparium,
Polygonum tenoreanum,
Polygonum perfoliatum,
Polygonum plebeium,
Polygonum romanum,
Polygonum rurivagum,
Polygonum ramosissimum,
Polygonum douglasii,
Polygonum floribundum,
Polygonum equisetiforme,
Polygonum filicaule,
Polygonum bellardii,
Polygonum boreale,
Polygonum aviculare,
Polygonum cognatum,
Polygonum careyi,
Polygonum maritimum,
Polygonum patulum,
Polygonum papillosum,
Polygonum oxyspermum,
Polygonum glaucum,
Polygonum gussonei,
Polygonum longiocreatum,
Polygonum longipes,
Polygonum istanbulicum,
Polygonum americanum,
Polygonum basiramium,
Polygonum parksii,
Polygonum angustifolium,
Polygonum coriarium,
Polygonum divaricatum,
Polygonum dshawachischwilii,
Polygonum erectum,
Polygonum hissaricum,
Polygonum humifusum,
Polygonum jurii,
Polygonum panjutinii,
Polygonum thunbergii,
Polygonum tripterocarpum,
Polygonum weyrichii,
Polygonum brittingeri,
Polygonum lacerum,
Polygonum paraguayense,
Species in the Polygonaceae family
Acanthoscyphus parishii,
Afrobrunnichia africana,
Afrobrunnichia erecta,
Antigonon flavescens,
Antigonon guatimalense,
Antigonon leptopus,
Aristocapsa insignis,
Atraphaxis intricata,
Atraphaxis angustifolia,
Atraphaxis aucheri,
Atraphaxis avenia,
Atraphaxis badghysi,
Atraphaxis billardieri,
Atraphaxis bracteata,
Atraphaxis canescens,
Atraphaxis caucasica,
Atraphaxis compacta,
Atraphaxis daghestanica,
Atraphaxis decipiens,
Atraphaxis frutescens,
Atraphaxis grandiflora,
Atraphaxis irtyschensis,
Atraphaxis karataviensis,
Atraphaxis kopetdagensis,
Atraphaxis laetevirens,
Atraphaxis macrocarpa,
Atraphaxis manshurica,
Atraphaxis muschketowii,
Atraphaxis pungens,
Atraphaxis pyrifolia,
Atraphaxis rodinii,
Atraphaxis seravschanica,
Atraphaxis spinosa,
Atraphaxis suaedifolia,
Atraphaxis teretifolia,
Atraphaxis virgata,
Atraphaxis arianum,
Atraphaxis atraphaxiforme,
Atraphaxis toktogulicum,
Brunnichia ovata,
Calligonum acanthopterum,
Calligonum aciferum,
Calligonum aculeatum,
Calligonum aequilaterale,
Calligonum alaschanicum,
Calligonum alatiforme,
Calligonum alatum,
Calligonum amoenum,
Calligonum androssowii,
Calligonum aphyllum,