Rumex hastatulus |
Rumex nematopodus |
|
---|---|---|
heartwing dock, heartwing sorrel, wild dock, wild sorrel |
Arizona dock |
|
Habit | Plants annual or short-lived perennial, glabrous, with vertical rootstock. | Plants perennial, glabrous or nearly so, with fusiform, vertical rootstock. |
Stems | solitary or several from base, erect or ascending, branched in distal 2/3 (in inflorescence), 10–40(–45) cm. |
erect, branched in distal 1/2, 40–85(–100) cm. |
Leaves | blade obovate-oblong, ovate-lanceolate, oblong-lanceolate, or lanceolate; 2–6(–10) × 0.5–2 cm, base hastate (with spreading lobes), auriculate, or occasionally without evident lobes, margins entire, flat, apex obtuse or subacute. |
ocrea deciduous or partially persistent at maturity; blade oblong-lanceolate to lanceolate, 20–35 × 5–12 cm, base cordate to broadly cuneate, margins entire or nearly so, flat, apex acute or attenuate. |
Inflorescences | terminal, occupying distal 2/3 of stem, usually lax and interrupted, narrowly paniculate. |
terminal, occupying distal 1/2–2/3 of stem, interrupted in proximal 1/2, paniculate, branched. |
Pedicels | articulated in proximal part, filiform, 1.5–2.5(–3) mm, articulation indistinct or slightly swollen. |
articulated in proximal 1/3, filiform, 12–20 mm, 3–4 times as long as inner tepals, articulation weakly evident, not swollen. |
Flowers | 3–6(–8) in whorls; inner tepals orbiculate or broadly ovate, 2.5–3.2 × 2.7–3.2 mm, base broadly cordate or rounded, apex obtuse or subacute; tubercles absent or some inner tepals with slightly swollen central veins. |
10–20 in whorls; inner tepals ovate-triangular, 4–5(–6) × 3–4(–5) mm, base truncate to subcordate, margins entire, apex acute to subacute; tubercles absent. |
Achenes | brown or dark brown, 0.9–1.2 × 0.6–0.8 mm. |
brown, 3 × 1.5 mm. |
2n | = 8 (pistillate plants), 9 (staminate plants), 10 (both sexes). |
= 120. |
Rumex hastatulus |
Rumex nematopodus |
|
Phenology | Flowering spring–summer. | Flowering spring–early summer. |
Habitat | Dry to moist alluvial and ruderal habitats, river valleys, sandy plains, meadows, waste places | Seasonally wet habitats along rivers and streams |
Elevation | 0-500 m (0-1600 ft) | 2500-3000 m (8200-9800 ft) |
Distribution |
AL; AR; FL; GA; IL; IN; KS; LA; MD; MO; MS; NC; NY; OK; PA; SC; TN; TX; VA
|
AZ; NM; n Mexico (Chihuahua) |
Discussion | Rumex hastatulus is distinct in subg. Acetosa and belongs to the monotypic subsect. Americanae Á. Löve & N. Sarkar. It is represented by at least two chromosome races: populations occurring from North Carolina to Florida and Mississippi normally have 2n = 8 in pistillate plants and 2n = 9 in staminate plants; populations from Louisiana to Texas and Oklahoma predominantly have 2n = 10 in both sexes. Rumex hastatulus has been reported from New Mexico (W. C. Martin and C. R. Hutchins 1980, vol. 1), but those records need confirmation. When fruiting, R. hastatulus has large inner tepals that distinguish it from R. acetosella, with which it is occasionally confused. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Rumex nematopodus has been reported from several localities in Arizona, New Mexico, and northern Mexico (K. H. Rechinger 1954). It is closely related to R. occidentalis, differing from that species in having longer pedicels and smaller inner tepals with acute apices. Those characters are highly variable in almost all species of the R. aquaticus aggregate, and the taxonomic status of R. nematopodus remains unclear. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 5, p. 502. | FNA vol. 5, p. 519. |
Parent taxa | Polygonaceae > subfam. Polygonoideae > Rumex > subg. Acetosa | Polygonaceae > subfam. Polygonoideae > Rumex > subg. Rumex > sect. Rumex |
Sibling taxa | ||
Synonyms | Acetosa hastatula, R. engelmannii | R. aquaticus subsp. nematopodus |
Name authority | Baldwin: in S. Elliott, Sketch Bot. S. Carolina 1: 416. (1817) | Rechinger f.: Leafl. W. Bot. 7: 134. (1954) |
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