Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington to California, east to Idaho, Montana, and Nevada.
Habitat: Subalpine to alpine ridges, meadows and talus slopes.
Flowers: June-August
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Glabrous to pubescent herbaceous perennial from a thick root and branched crown, the stems several, stout, erect, simple or branched above, 8-20 dm. tall.
Leaves alternate, crowded, all cauline, only slightly reduced upward, petiolate, becoming subsessile above, the blade lanceolate to ovate-lanceolate, 6-12 cm. long; stipules brownish, oblique, not lacerate.
Flowers perfect, numerous, in terminal, subterminal and axillary panicles; perianth white to greenish-white, 2.5-3 mm. long, the 5 segments elliptic to obovate; stamens 8, included; styles 3, distinct, 0.5 mm. long.
Achene with 3 sharp angles, yellowish-brown, smooth, 4-5 mm. long.
Publication: Fl. Rocky Mts. 1061 as Aconogonum phytolaccaefolium). 1917.
Polygonum phytolaccifolium Meisn. ex Small
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var. phytolaccifolium – poke knotweed
Occurring chiefly east of the Cascades crest in Washington; Washington to California, east to Idaho, Montana, and Nevada.
PNW Herbaria: Specimen records of Aconogonon phytolaccifolium in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Aconogonon phytolaccifolium checklist entry
OregonFlora: Aconogonon phytolaccifolium information
E-Flora BC: Aconogonon phytolaccifolium atlas page
CalPhotos: Aconogonon phytolaccifolium photos
