Proc. Amer. Acad. Arts 8: 400. 1872.
Shrubs. Stems erect, brown, simple, wiry, gnarled with age, 20–60 cm, glabrous. Leaves crowded at branch tips, not articulated to ocreae, basal leaves caducous or persistent, distal leaves abruptly reduced to bracts; ocrea 6–10 mm, glabrous or papillose-scabridulous, proximal part cylindric, distal part silvery, deeply fringed, disintegrating; petiole absent; blade 3-veined, without pleats, linear to subulate, 3–15 (–25) × 0.4–1.5 mm, margins flat, smooth, apex acuminate to spine-tipped. Inflorescences axillary; cymes in distal axils, 1–2-flowered. Pedicels absent. Flowers semi-open; perianth 2.6–3.2 mm; tube 18–33% of perianth length; tepals overlapping, ± recurved, uniformly white to pink, petaloid, elliptic-oblong to obovate, navicular, apex rounded; midveins unbranched; stamens 8. Achenes enclosed in perianth, light-brown, lanceolate to oblong-ovate, 2.5–3 mm, faces subequal, shiny, smooth.
Phenology: Flowering Jun–Nov.
Habitat: Open, dry, gravelly, rocky places
Elevation: 300-1500 m
Polygonum bolanderi is known from several counties in northwestern California (Butte, Napa, Shasta, and Sonoma).
"/2" is not declared as a valid unit of measurement for this property.