Difference between revisions of "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.
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Revision as of 22:08, 5 November 2020

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 +