Atriplex confertifolia |
Atriplex parishii |
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shadscale, shadscale saltbush, sheepfat, spiny saltbush |
Parish's brittlescale, Parish's saltbush, Parrish's brittlescale |
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Habit | Shrubs, dioecious, 3–8 dm, spinescent. | Herbs, erect or spreading to prostrate, 0.5–3 dm; branches almost horizontal to ascending, fragile, white scurfy or villous (in var. parishii). | ||||||||||||||||
Leaves | persistent, alternate; petiole 1–4 mm; blade orbiculate to ovate, elliptic, or oval, 9–25(–45) × 4–20(–25) mm, margin entire, apex obtuse. |
numerous, all or nearly all opposite or almost all alternate, distal ones imbricate or widely separated, tending to recurve; blade lanceolate to ovate, (2–)4–10 × 3–8 mm, rigid, base mostly rounded to cordate, margin entire, gray to white, densely scurfy (or hairy). |
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Staminate flowers | yellow, in clusters 2–4 mm wide or in spikes to 1 cm, axillary, in foliose-bracteate, divaricately branched panicles 3–15 cm. |
mostly in distal axils pistillate in proximal axils, or mostly in terminal spike (var. persistens), or partly so (var. subtilis). |
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Pistillate flowers | in similar paniculate inflorescences. |
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Seeds | 1.5–2 mm wide. |
dark brown or almost black, 0.8–1.5 mm. |
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Fruiting | bracteoles sessile or subsessile, suborbiculate to rhombic or elliptic, 4–12 mm and wide, body indurate, terminal teeth distinct, foliaceous, shorter than bracteoles, entire or toothed below, terminal teeth spreading at maturity, faces smooth, lacking appendages. |
bracteoles sessile, ovate or rhombic, slightly compressed to thickened, 2–3.5(–4) mm and about as broad or sometimes broader, often subhastately lobed, united 1/2 of length, entire or with few teeth on each side, tuberculate on 1 or both faces. |
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2n | = 18, 36, 54+. |
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Atriplex confertifolia |
Atriplex parishii |
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Phenology | Flowering spring–fall. | |||||||||||||||||
Habitat | Gravelly to fine-textured soils in greasewood, mat-atriplex, other salt desert shrub, sagebrush, pinyon-juniper, and ponderosa pine communities | |||||||||||||||||
Elevation | 600-2200 m (2000-7200 ft) | |||||||||||||||||
Distribution |
AZ; CA; CO; ID; MT; ND; NM; NV; OR; TX; UT; WY
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CA
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Discussion | Shadscale forms hybrids with Atriplex canescens, A. garrettii, A. corrugata, and A. gardneri varieties. It is, however, closely allied to A. parryi and A. spinifera. The plants are widely dispersed, typically on saline substrates but less commonly on essentially non-saline ones, through large areas of the western United States and adjacent Canada and Mexico, on both raw and exposed geological strata and on alluvium. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 5 (5 in the flora). The Atriplex parishii complex consists of a series of microphyllous, low clump-forming annuals apparently disjunct from each other in the Central Valley of California and in near coastal southern California. Often they occupy vernal pools that dry as the season progresses; the substrates in all cases evidently are saline or alkaline, or both. For the most part, the bracteate distal leaves are cordate to rounded at the base, and spreading to spreading-ascending, and the fruiting bracteoles are mainly less than 3.5 mm in length. (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. 356. | ||||||||||||||||
Parent taxa | Chenopodiaceae > Atriplex > subg. Pterochiton | Chenopodiaceae > Atriplex > subg. Obione > sect. Obione > subsect. Pusillae | ||||||||||||||||
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Subordinate taxa | ||||||||||||||||||
Synonyms | Obione confertifolia, A. collina, A. subconferta, Obione rigida | Obione parishii | ||||||||||||||||
Name authority | (Torrey & Frémont) S. Watson: Proc. Amer. Acad. Arts 9: 119. (1874) | S. Watson: Proc. Amer. Acad. Arts 17: 377. (1882) | ||||||||||||||||
Web links |