Rumex venosus |
Rumex pycnanthus |
|
|---|---|---|
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veiny dock, wild begonia, wing dock |
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|
| Habit | Plants perennial, glabrous or nearly so, with creeping rhizomes. | Plants perennial, glabrous or indistinctly papillose-pubescent, with fusiform or creeping horizontal rhizome. |
| Stems | ascending or, rarely, erect, usually producing axillary shoots near base, (10–)15–30(–40) cm. |
erect, branched above middle (only in inflorescence), 60–100 cm. |
| Leaves | blades ovate-elliptic, obovate-elliptic, or ovate-lanceolate, (2–)4–12(–15) × 1–5(–6) cm, subcoriaceous, base narrowly to broadly cuneate, margins entire, flat or slightly undulate, apex acute or acuminate. |
ocreae deciduous or partially persistent at maturity; blade normally oblong-lanceolate, 20–45 × 8–10 cm, normally more than 3 times as long as wide, base broadly cuneate, truncate, or weakly cordate, margins entire, flat or indistinctly crisped, apex obtuse or broadly acute. |
| Inflorescences | terminal and axillary, usually occupying distal 2/3 of stem/shoot, usually dense, or interrupted in proximal part, broadly paniculate. |
terminal, occupying distal 1/2 of stem, often dense, narrowly paniculate. |
| Pedicels | articulated near middle, filiform or slightly thickened, (8–)10–16 mm, articulation distinct, slightly swollen. |
articulated in proximal 1/2, occasionally almost near base, filiform, 3–11 mm, articulation indistinct or weakly evident. |
| Flowers | 5–15 in whorls; inner tepals distinctly double-reticulately veined, orbiculate or reniform-orbiculate, 13–18(–20) × (20–)23–30 mm, base deeply emarginate or cordate, margins entire, apex rounded, obtuse, rarely subacute, with short, broadly triangular tip; tubercles absent, occasionally very small. |
10–20 in whorls; inner tepals ovate-deltoid or ovate-triangular, 4–7 × 3–5 mm, widest at or near base, base truncate or weakly emarginate, margins erose to minutely dentate at least near base, apex narrowly acute; tubercles absent. |
| Achenes | brown or dark brown, 5–7 × 4–6 mm. |
deep brown to reddish brown, 3–4 × 1.5–2.2 mm. |
| 2n | = 40. |
= 120. |
Rumex venosus |
Rumex pycnanthus |
|
| Phenology | Flowering spring–early summer. | Flowering late spring–summer. |
| Habitat | Sand dunes, sandy and gravelly riverbanks and slopes, deserts, grasslands 200-1500 m | Along streams and rivers in montane, subalpine, and alpine zones |
| Elevation | 1700-3000 m [5600-9800 ft] | |
| Distribution |
AZ; CA; CO; IA; ID; KS; MN; MT; ND; NE; NM; NV; OK; OR; SD; TX; UT; WA; WI; WY; AB; MB; SK
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CO; UT |
| Discussion | Rumex venosus is a distinctive species rarely confused with any other members of the genus. However, I have seen herbarium specimens of it misidentified as R. hymenosepalus, and vice versa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Rumex pycnanthus was reported (as R. subalpinus M. E. Jones) from White Pine County, Nevada (Mont E. Lewis 1973) and may occur in that state; according to J. T. Kartesz (1987, vol. 1), that record was based on misidentification of R. californicus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| Parent taxa | ||
| Sibling taxa | ||
| Synonyms | R. subalpinus, R. densiflorus subsp. pycnanthus | |
| Name authority | Pursh: Fl. Amer. Sept. 2: 733. (1813) | Rechinger f.: Repert. Spec. Nov. Regni Veg. 38: 372. (1935) |
| Source | FNA vol. 5, p. 505. | FNA vol. 5, p. 516. |
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