Atriplex patula |
Atriplex gardneri |
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common orache, halberd-leaf orache, spear orach, spear orache, spear oracle, spear saltbush, spear saltweed, spearscal e, spearscale orache |
Gardner's orache, Gardner's sagebrush, Gardner's saltbrush, Gardner's saltbush, Nuttall's saltbush |
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Habit | Herbs, monoecious or subdioecious, (1.5–)3–9(–15) dm. | Shrubs or subshrubs, dioecious or monoecious, 1–10 dm, unarmed. | ||||||||||||||||||||||||
Stems | mostly erect and branched, branches green, obtusely angled or striate, glabrate. |
prostrate to ascending, or less commonly erect. |
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Leaves | alternate except the proximalmost, petiolate; blade green on both sides, rhombic-lanceolate to lanceolate, oblong, or narrowly lance-oblong or hastate-ovate, 25–120 × 3–40(–75) mm, entire or toothed, proximal ones broadly cuneate or sometimes hastate subbasally with obliquely antrorse basal lobes, distal cauline leaves lanceolate and entire. |
± persistent, alternate or opposite to subopposite (especially proximally), sessile to petiolate; blade linear to oblanceolate, obovate, spatulate, or orbiculate, 5–55 × 2–25 mm, base cuneate, margin entire (rarely dentate), apex retuse to obtuse or rounded. |
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Flowers | compact or interrupted spiciform or paniculiform clusters. |
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Staminate flowers | mostly 5-merous. |
yellow or brown, in numerous clusters 2–4 mm wide, in spikes or panicles 2–30 cm. |
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Pistillate flowers | in spikes or panicles to 30 cm. |
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Seeds | dimorphic: brown, 2.5–3(–3.5) mm wide, or black, 1–2 mm wide; radicle of brown seeds subbasal to median, antrorse. |
tan or brown, 1.5–2.5 mm wide. |
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Fruiting | bracteoles green becoming black, rhombic to rhombic-triangular, or ovate-rhombic, compressed, ± uniformly sized, 2–7(–20) mm, base mostly hastate, acute, margin united almost to middle, entire or sparingly toothed, surfaces tuberculate. |
bracteoles 2–9 × 2–9 mm, bearing tubercles or wings or tubercles aligned in 4 rows or rarely smooth, apex toothed and usually with 2 or more lateral teeth. |
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2n | = 36. |
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Atriplex patula |
Atriplex gardneri |
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Phenology | Flowering summer–fall. | |||||||||||||||||||||||||
Habitat | Widespread ruderal weed of nonsaline substrates such as fields, gardens, and roadsides | |||||||||||||||||||||||||
Elevation | 0-2100 m (0-6900 ft) | |||||||||||||||||||||||||
Distribution |
AK; AL; CA; CO; DC; DE; IA; ID; IL; IN; MA; MD; ME; MI; MO; MT; NC; ND; NH; NV; NY; OH; PA; RI; SD; UT; VA; VT; WI; WY; AB; BC; MB; NB; NF; NS; ON; QC; SK; YT; Europe; Asia; n Africa
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AZ; CA; CO; ID; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; MB; SK; Mexico
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Discussion | Atriplex patula appears to have been a rather recent introduction in North America from Eurasia, not arriving perhaps until sometime in the early to mid-eighteenth century. It simulates depauperate specimens of A. dioica, A. glabriuscula, and other similar species when leaves are reduced to a near-linear profile. Such specimens are difficult if not impossible to assign to any of the species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 7 (7 in the flora). This is a widely distributed complex of intergrading genotypes of great phenotypic plasticity. The members occur commonly in fine-textured saline substrates in much of the western Great Plains and in the Intermountain Region. Diploids, triploids, tetraploids, and hexaploids (and higher polyploids, all multiples of the base number 9) are known within the complex, and hybrids are known not only between the constituents but with the other woody species which they contact, i.e., Atriplex canescens, A. confertifolia, and A. corrugata. Indeed, a case can be made for treating both A. gardneri and A. canescens within an expanded A. canescens. They are regarded here as forming two intergrading complexes, with some of the constituent varieties placed equally well within either of the species aggregations. The treatment essentially follows the alignment of taxa suggested by C. A. Hanson (1962), with the exception that they are reduced to varietal status and var. bonnevillensis and var. aptera are placed within the A. gardneri phase and not with A. canescens. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 4, p. 333. | FNA vol. 4. | ||||||||||||||||||||||||
Parent taxa | Chenopodiaceae > Atriplex > subg. Atriplex > sect. Teutliopsis | Chenopodiaceae > Atriplex > subg. Pterochiton | ||||||||||||||||||||||||
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Subordinate taxa | ||||||||||||||||||||||||||
Synonyms | A. hastata subsp. patula, A. hastata var. patula, Teutiopsis patula | Obione gardneri, A. nuttallii subsp. gardneri, A. nuttallii var. gardneri | ||||||||||||||||||||||||
Name authority | Linnaeus: Sp. Pl. 2: 1053. (1753) | (Moquin-Tandon) D. Dietrich: Syn. Pl. 5: 537. (1852) | ||||||||||||||||||||||||
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