Polygonum fowleri

B. L. Robinson

Rhodora 4: 67, plate 35, figs. 14, 15. 1902.

IllustratedEndemic
Treatment appears in FNA Volume 5. Treatment on page 554. Mentioned on page 548, 550, 555, 556.

Plants green, sometimes purple tinged, homophyllous or heterophyllous, sometimes subsucculent. Stems prostrate to ascending, sometimes zigzagged, branched from base, not wiry, 5–50 cm. Leaves: ocrea 2.5–12 mm, proximal part funnelform, distal part soon disintegrating, nearly completely deciduous or fibers persistent; petiole 2–7 mm; blade light green, sometimes purple tinged, elliptic to elliptic-obovate or obovate, 8–30(–50) × 4–15(–25) mm, margins flat, apex acute to obtuse; middle stem leaves 1.1–2.1(–3.4) times as long as adjacent branch leaves, distal leaves overtopping flowers. Inflorescences axillary; cymes uniformly distributed, 1–7(–10)-flowered. Pedicels enclosed in or sometimes exserted from ocreae, 1–2.5 mm. Flowers closed; perianth (2.2–)2.5–4.5 mm; tube 23–38% of perianth length; tepals initially overlapping, pushed apart as achene develops, green, margins white to pink, petaloid, not keeled, oblong, cucullate; midveins branched, sometimes not visible; stamens 6–8. Achenes exserted from perianth, brown to dark brown, broadly ovate to ovate-lanceolate, (2–)3-gonous, (1.8–)2–3.7(–4.5) mm, faces subequal or unequal, flat to concave, apex beaked, edges strongly concave, shiny to dull, roughened, rarely obscurely tubercled; late-season achenes common, 4–6 mm.

Distribution

V5 1130-distribution-map.gif

B.C., Man., N.B., N.S., N.W.T., Nunavut, Ont., P.E.I., Que., Yukon, Alaska, Calif., Maine, Oreg., Wash.

Discussion

Subspecies 2 (2 in the flora).

Selected References

None.

Key

1 Achenes broadly ovate, (2.5-)3-3.7(-4.5) mm; perianth 3-4.5 mm Polygonum fowleri subsp. fowleri
1 Achenes ovate-lanceolate, (1.8-)2-2.5 (-3.1) mm; perianth (2.2-)2.5-3.3(-3.5) mm Polygonum fowleri subsp. hudsonianum
... more about "Polygonum fowleri"
Mihai Costea +, François J. Tardif +  and Harold R. Hinds† +
B. L. Robinson +
B.C. +, Man. +, N.B. +, N.S. +, N.W.T. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Yukon +, Alaska +, Calif. +, Maine +, Oreg. +  and Wash. +
Illustrated +  and Endemic +
Polygonum fowleri +
Polygonum sect. Polygonum +
species +