Atriplex coronata |
Atriplex laciniata |
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crownscale, wedgescale |
Belgian orach, frosted orache |
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Habit | Herbs, erect or decumbent, 0.5–6 dm; branches terete, fructiferous almost to base, scurfy when young. | Herbs, procumbent, many branched, alternate except basally, 0.06–3 dm. | ||||||||
Stems | reddish or yellowish, smooth or subangular. |
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Leaves | alternate, subsessile or proximal short petiolate; blade ascending, oblong, oblong-ovate, or lanceolate to elliptic, 5–40 × 2–10 mm, thin, base acute to obtuse, margin entire, apex acute to acuminate. |
with blade ovate to lance-ovate or lanceolate to oblong, 15–45 mm, large basal lobes, obtuse, cuneate to a short petiole, margin sinuate-dentate, scurfy on both sides. |
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Flowers | of both sexes in small axillary glomerules, 5-merous. |
in glomerules in distal leaf axils, axillary or in short terminal spikes. |
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Seeds | light brown to amber, 1–1.5 mm. |
monomorphic, light brown, 3.5–4 mm wide; radicle inferior. |
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Fruiting | bracteoles almost sessile, broadly cuneate, 2–5 × (2–)2.5–5 mm, united to summit, truncate at summit, sides smooth or obscurely tuberculate. |
bracteoles whitish green, sessile or subsessile, broadly rhombic, (4–)6–7(–8) mm, thickened at base, becoming scaly in age, cartilaginous in basal 1/2, lateral angles strongly produced and with margin mostly entire, faces smooth or irregular, pointed, or flattened and winglike tubercles in basal 1/2. |
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2n | = 36. |
= 18. |
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Atriplex coronata |
Atriplex laciniata |
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Phenology | Flowering summer–fall. | |||||||||
Habitat | Sand, cobble on more or less protected beaches, on Zostera and Fucus wrack | |||||||||
Elevation | 0-50 m (0-200 ft) | |||||||||
Distribution |
CA
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NB; NS; PE; QC; Europe [Introduced in North America] |
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Discussion | Varieties 3 (3 in the flora). Although placed within the Atriplex argentea species complex by P. C. Standley (1916), this taxon appears more nearly allied to A. cordulata, differing mainly in leaf shape, round-ovate or deltoid-ovate to elliptic or lanceolate (not ovate to cordate-ovate), and markedly tuberculate faces of the fruiting bracteoles. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Atriplex laciniata is evidently rare in North America. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 4. | FNA vol. 4, p. 341. | ||||||||
Parent taxa | Chenopodiaceae > Atriplex > subg. Obione > sect. Obione > subsect. Pusillae | Chenopodiaceae > Atriplex > subg. Atriplex > sect. Sclerocalymma | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | A. elegans var. coronata, Obione coronata | |||||||||
Name authority | S. Watson: Proc. Amer. Acad. Arts 9: 114. (1874) | Linnaeus: Sp. Pl. 2: 1053. (1753) | ||||||||
Web links |