Polygonum polygaloides subsp. confertiflorum
Madroño 31: 251. 1984.
Stems 2–15 cm. Inflorescences mostly confined to tips of branches, rarely interrupted and continuous from bases of branches or stems, ovoid to cylindric, 7–40 × 5–10 mm; bracts ascending to appressed, linear to linear-lanceolate, 4–11 mm, moderately rigid to rigid, margins revolute, white, scarious portion 0.25–0.4 mm wide; midvein moderately to heavily thickened, lateral-veins inconspicuous. Flowers: perianth 1.8–2.2 (–2.4) mm; tube 22–30% of perianth length; tepals white or red; perianth-tube and base of tepals smooth or, sometimes, papillose; stamens 3. Achenes brown to dark-brown, ovatelanceolate to ovate, 1.5–2 mm, reticulate with longitudinal ridges, dull.
Phenology: Flowering May–Aug.
Habitat: Vernal pools, wet meadows
Elevation: 500-1900 m
Alta., B.C., Sask., Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash., Wyo.
"/2" is not declared as a valid unit of measurement for this property.