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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Annual to shrub; hairs simple, stellate, or glandular; plants in several genera scaly, mealy, or powdery from collapsed glands; monoecious, dioecious, with bisexual flowers, or with both bisexual and unisexual flowers. Stem: occasionally fleshy. Leaf: blade simple, generally alternate, occasionally fleshy or reduced to scales, veins pinnate; stipules 0. Inflorescence: raceme, spike, catkin-like, spheric head, axillary clusters of flowers, or flowers 1; bracts 0–5, herbaceous, generally persistent or strongly modified in fruit, wings, tubercles or spines present or 0. Flower: bisexual or unisexual, small, generally green; calyx parts (1)3–5, or 0 in pistillate flowers, free or fused basally (or ± throughout), leaf-like in texture, membranous, or fleshy, deciduous or not, often strongly modified in fruit; corolla 0; stamens 1–5, opposite sepals, filaments free, equal; anthers 4-chambered; ovary superior (1/2-inferior), chamber 1; ovule 1; styles, stigmas 1–4 (or stigmas sessile). Fruit: achene or utricle, generally falling with persistent calyx or bracts. Seed: 1, small, lenticular to spheric; seed coat smooth to finely dotted, warty, net-like, or prickly, margin occasionally winged.
100 genera, 1500 species: worldwide, especially deserts, saline or alkaline soils; some cultivated for food (Beta vulgaris subsp. vulgaris, beet, Swiss chard; Spinacia oleracea L., spinach; Chenopodium quinoa Willd., quinoa); and some worldwide, naturalized ruderal or noxious agricultural weeds. Nitrophila treated in Amaranthaceae, Sarcobatus treated in Sarcobataceae. Key to genera revised by Elizabeth H. Zacharias to incorporate Extriplex and Stutzia, 2 genera segregated from Atriplex. —Scientific Editors: Bruce G. Baldwin, David J. Keil, Thomas J. Rosatti.
Key to Chenopodiaceae
1 sp.: North America, South America. (R.A. Rolfe, English botanist, 1855–1921) [Shultz 2004 FNANM 4:321]
Unabridged etymology: (Robert Allen Rolfe, English botanist, 1855–1921)
Shrub, 3–15 dm, glabrous; deciduous. Stem: erect or decumbent, many-branched, woody proximally, distally fleshy in age; jointed; joints (2)3–5(10) mm, 1–4.5 mm wide. Leaf: clasping, 2–4 mm, 2–3 mm wide, scale-like, triangular, margins entire, tip acute. Inflorescence: spike, 6–25 mm, cylindric; flowers spirally arranged in 3s or 5s; bracts deciduous, fleshy, peltate. Flower: bisexual, sessile; calyx 1–1.5 mm, 4–5-lobed, persistent, enclosing fruit; stamens 1–2, exserted; stigmas 2(3). Fruit: utricle, ± 1 mm, ovoid. Seed: erect, red-brown.
n=9. Flats, hummocks, in alkaline soils; < 1450 m. Great Central Valley, e San Francisco Bay Area, s East of Sierra Nevada, Desert; to Oregon, Idaho, Texas, Mexico. Jun–Aug [Online Interchange]
Previous taxon: Allenrolfea
Next taxon: Aphanisma
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Nov 30 2015
Citation for this treatment: [Author of taxon treatment] 2013. Allenrolfea, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=12469, accessed on Nov 30 2015
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© 2009 Gary A. Monroe
|Geographic subdivisions indicated for the distribution of Allenrolfea occidentalis|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
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