Persicaria robustior |
Persicaria bungeana |
|
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r enouée robuste, stout dotted smartweed, stout smartweed |
prickly smartweed |
|
Habit | Plants perennial, 3–20 dm; roots also sometimes arising from proximal nodes; rhizomes present, stolons sometimes present. | Plants annual, 3–8 dm; roots not also arising from proximal nodes. |
Stems | ascending, usually branched proximally, scarcely ribbed, glabrous, glandular-punctate; branches sometimes creeping and rooting at nodes. |
ascending to erect, ribbed or obscurely so, glabrous or glandular-pubescent distally; prickles 1–1.5 mm. |
Leaves | ocrea light brown, cylindric, 10–15 mm, chartaceous, base inflated, margins truncate, ciliate with bristles 3–12 mm, surface strigose, glandular-punctate; petiole 0.2–2 cm, glandular-punctate; blade without dark triangular or lunate blotch adaxially, lanceolate to elliptic-lanceolate, 4–20 × 2–4.5 cm, base tapered, margins antrorsely strigose, apex acute to acuminate, faces glabrous or main veins scabrous, glandular-punctate. |
ocrea brownish, cylindric, 8–14 mm, chartaceous, base inflated or not, without prickles, margins truncate, ciliate with bristles 2–4 mm, surface with appressed bristles along veins; petiole 0.5–1.5 cm; blade lanceolate to narrowly elliptic, 5–12.5 × 1.5–3.5 cm, base acute, margins entire, antrorsely ciliate, apex acute acuminate, rarely obtuse, faces glabrous or pubescent and, usually, with antrorse prickles along midvein abaxially and adaxially. |
Inflorescences | terminal and axillary, erect, uninterrupted, 20–80 × 5–10 mm; peduncle 5–40 mm, glandular-punctate; ocreolae usually overlapping, margins eciliate or proximal ones sometimes ciliate with bristles to 1 mm. |
racemelike, uninterrupted or interrupted proximally, 20–45 × 5–10 mm; peduncle 20–40 mm, usually stipitate-glandular at least proximally; ocreolae usually overlapping, sometimes not overlapping proximally, margins eciliate. |
Pedicels | ascending to spreading, 2–5 mm. |
mostly ascending, 2–3 mm. |
Flowers | 2–4 per ocreate fascicle, homostylous; perianth greenish proximally, white distally, glandular-punctate with punctae ± uniformly distributed, slightly accrescent; tepals 5, connate ca.1/3 their length, obovate, 3.2–4.2 mm, veins prominent or not, not anchor-shaped, margins entire, apex obtuse to rounded; stamens 6–8, included; anthers pink or red, elliptic; styles 3, connate proximally. |
2–4 per ocreate fascicle; perianth pale green, often tinged red, glabrous, accrescent, not becoming blue and fleshy in fruit; tepals 5, connate 1/4–1/3 their length, petaloid, elliptic to broadly elliptic, 3–4 mm, apex obtuse; stamens 8, filaments distinct, free; anthers pink, ovate; styles 2, connate to middle. |
Achenes | included or apex exserted, dark brown to brownish black, 3-gonous, 2.7–3.6 × 2–2.5 mm, shiny, smooth. |
included, black, biconvex, 2.5–3 × 2.3–2.8 mm, dull, rugose. |
Persicaria robustior |
Persicaria bungeana |
|
Phenology | Flowering Jul–Oct. | Flowering Jul–Sep. |
Habitat | Peaty shores, often in water on coastal plain or near coast | Cultivated fields |
Elevation | 0-1500 m (0-4900 ft) | 300-400 m (1000-1300 ft) |
Distribution |
CT; DE; FL; IN; KY; MA; MD; ME; MI; MO; NH; NJ; NY; OH; PA; RI; TX; VA; NS; ON; QC; Central America; South America; West Indies
|
IA; IL; MN; e Asia (n China, Japan, Korea, Manchuria) [Introduced in North America] |
Discussion | Persicaria robustior often is synonymized with P. punctata. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Persicaria bungeana is a weed of soybean fields (R. N. Andersen et al. 1985). It is not known how or when it was introduced into the midwestern United States. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 5, p. 584. | FNA vol. 5, p. 578. |
Parent taxa | Polygonaceae > subfam. Polygonoideae > Persicaria > sect. Persicaria | Polygonaceae > subfam. Polygonoideae > Persicaria > sect. Echinocaulon |
Sibling taxa | ||
Synonyms | Polygonum punctatum var. robustius, P. punctata var. robustior, Polygonum punctatum var. majus, Polygonum robustius | Polygonum bungeanum |
Name authority | (Small) E. P. Bicknell: Bull. Torrey Bot. Club 36: 455. (1909) | (Turczaninow) Nakai: in T. Mori, Enum. Pl. Corea, 131. (1922) |
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