Persicaria careyi |
Persicaria wallichii |
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Carey's smartweed, renouée de Carey |
garden knotweed, garden smartweed, Himalayan knotweed, Kashmir plume |
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Habit | Plants annual, 3–15(–20) dm; roots also rarely arising from proximal nodes; rhizomes and stolons absent. | |
Stems | erect, branched distally, ribbed distally, hirsute proximally, stipitate-glandular distally, usually smooth proximally. |
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Leaves | ocrea brownish to reddish brown, cylindric, 8–20 mm, chartaceous, base inflated or not, margins truncate, ciliate with bristles 2–7 mm, surface strigose to hirsute, not glandular-punctate, rarely stipitate-glandular; petiole (0.1–)0.5–1.5 cm, hirsute, leaves sometimes sessile; blade without dark triangular or lunate blotch adaxially, narrowly lanceolate, 6–18 × 1–3.5 cm, base tapering, margins antrorsely strigose, apex acuminate to attenuate, faces sparingly hirsute abaxially and adaxially, veins often hirsute, sometimes stipitate-glandular. |
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Inflorescences | terminal and axillary, nodding or drooping, usually interrupted, 10–100 × 5–10 mm; peduncle 20–50 mm, stipitate-glandular; ocreolae overlapping or not overlapping proximally, margins eciliate or ciliate with bristles to 1.3 mm. |
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Pedicels | ascending to spreading, 1–4 mm. |
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Flowers | (1–)2–8 per ocreate fascicle, homostylous; perianth roseate or purple, glabrous, not glandular-punctate, scarcely accrescent; tepals 5, connate in proximal 1/3, obovate, 2.4–3.2 mm, veins prominent or not, not anchor-shaped, margins entire, apex obtuse to rounded; stamens 5 (or 8), included; anthers pink, elliptic; styles 2, connate to middle. |
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Achenes | included, dark brown to black, biconvex, 1.8–2.5 × 1.5–2 mm, shiny, smooth. |
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Persicaria careyi |
Persicaria wallichii |
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Phenology | Flowering Jul–Oct. | |
Habitat | Low thickets, swamps, bogs, moist shorelines, clearings, recent burns, cultivated ground | |
Elevation | 0-300 m (0-1000 ft) | |
Distribution |
CT; DE; FL; IL; IN; KY; MA; MD; ME; MI; MN; NH; NJ; NY; OH; PA; RI; VA; VT; WI; NB; ON; QC
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CA; MA; OR; BC; Asia
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Discussion | An infusion made from entire plants of Persicaria careyi was used by the Potawatomi as a cold remedy and febrifuge (D. E. Moerman 1998). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (1 in the flora). Persicaria wallichii is an ornamental that escapes infrequently in the flora area. A population in Nova Scotia apparently was ephemeral. Plants with leaf blades sparsely to densely pubescent abaxially and pedicels glabrous are var. wallichii, to which naturalized North American plants appear to be referable. Plants with leaf blades brownish-tomentose abaxially and pedicels usually pubescent are var. tomentosa S. P. Hong, which may be in cultivation in North America. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 5, p. 592. | FNA vol. 5, p. 581. |
Parent taxa | Polygonaceae > subfam. Polygonoideae > Persicaria > sect. Persicaria | Polygonaceae > subfam. Polygonoideae > Persicaria > sect. Rubrivena |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Polygonum careyi | Polygonum polystachyum, Aconogonon polystachyum, Pleuropteropyrum polystachyum, Reynoutria polystachya, Rubrivena polystachya |
Name authority | (Olney) Greene: Leafl. Bot. Observ. Crit. 1: 24. (1904) | Greuter & Burdet: Willdenowia 19: 41. (1989) |
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