Polygonum ramosissimum subsp. prolificum

(Small) Costea & Tardif

Sida 20: 995. 2003.

Common names: Renouée prolifique
WeedyEndemic
Basionym: Polygonum ramosissimum var. prolificum Small Bull. Torrey Bot. Club 21: 171. 1894
Synonyms: Polygonum prolificum Polygonum prolificum var. autumnale (Brenckle) Brenckle Polygonum prolificum var. profusum Brenckle
Treatment appears in FNA Volume 5. Treatment on page 552. Mentioned on page 551.

Plants bluish green when fresh, dark brown or black after drying, homophyllous. Stems 10–80 cm. Leaf blades bluish green, oblanceolate, 8–30(–35) × 4–6 mm, apex rounded or obtuse; stem leaves 1–2.5(–3.5) times as long as branch leaves; distal leaves overtopping flowers. Inflorescences axillary; cymes uniformly distributed or crowded toward tips of branches, 2–4-flowered. Pedicels enclosed in ocreae, 1–2 mm. Flowers: perianth 2–2.8(–3) mm; tepal margins white or pink; stamens 3. Achenes enclosed in or exserted from perianth, 1.6–2(–2.4) mm, shiny or dull, smooth, roughened, or obscurely tubercled; late-season achenes 4–10 mm. 2n = 60.


Phenology: Flowering Jul–Nov.
Habitat: Wet, saline places
Elevation: 0-2000 m

Distribution

V5 1124-distribution-map.gif

Alta., B.C., Man., Ont., P.E.I., Que., Sask., Ark., Calif., Conn., Del., Idaho, Ill., Iowa, Kans., Ky., La., Maine, Md., Mass., Minn., Miss., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Okla., Oreg., Pa., R.I., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.
Mihai Costea +, François J. Tardif +  and Harold R. Hinds† +
(Small) Costea & Tardif +
Polygonum ramosissimum var. prolificum +
Renouée prolifique +
Alta. +, B.C. +, Man. +, Ont. +, P.E.I. +, Que. +, Sask. +, Ark. +, Calif. +, Conn. +, Del. +, Idaho +, Ill. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Minn. +, Miss. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Okla. +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +  and Wyo. +
0-2000 m +
Wet, saline places +
Flowering Jul–Nov. +
Weedy +  and Endemic +
Polygonum prolificum +, Polygonum prolificum var. autumnale +  and Polygonum prolificum var. profusum +
Polygonum ramosissimum subsp. prolificum +
Polygonum ramosissimum +
subspecies +