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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 subshrub; monoecious and/or dioecious; occasionally spiny; hairs simple (branched). Leaf: blade simple, alternate or opposite, margins entire or serrate; veins pinnate; stipules 0. Inflorescence: axillary or terminal; 3-flowered cymes in dense spikes, heads or panicles; bracts 0 or 1–5, persistent; bractlets 0–2. Flower: bisexual or unisexual, small, green (± white), yellow or purple; perianth parts 0 or (1)3–5, free or fused basally, scarious or hardened, persistent; stamens 1–5, opposite perianth parts, free or basally fused as a tube, generally unequal, occasionally alternate with appendages on stamen tubes (pseudostaminodes), anthers 2- or 4-chambered; ovary superior, chamber 1; ovule 1 (2–many); style (0)1–3, stigmas 1–3(5). Fruit: utricle; generally with persistent perianth or bracts. Seed: 1 [2+], small, lenticular to spheric, smooth or dotted to striate or tubercled.
± 75 genera, 900 species: cosmopolitan, especially disturbed, arid, saline or alkaline soils; some cultivated for food, ornamental; many naturalized, ruderal or agricultural weeds. [Müller & Borsch 2005 Ann Missouri Bot Gard 92:66–102] Amaranthaceae including Chenopodiaceae by some. Polycnemoideae, represented in California by Nitrophila, formerly considered subfamily of Chenopodiaceae, but needs further research. Guilleminea densa (Willd.) Moq. var. aggregata Uline & W.L. Bray is a waif. Froelichia gracilis (Hook.) Moq. is an historical waif. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.
Unabridged references: [Kadereit et al. 2003 Int J Plant Sci 164:959–986; Robertson 1981 J Arnold Arbor 62:267–313]
Key to Amaranthaceae
Perennial herb, glabrous, rhizomed. Stem: decumbent to erect, ± ribbed. Leaf: opposite, sessile to clasping, linear to ovate, fleshy. Inflorescence: axillary, flowers 1–3; bractlets 1 or 2 per flower. Flower: calyx 5(7)-parted, enclosing fruit, papery, lobes erect, overlapping, ovate, back ribbed, persistent in fruit; stamens 5, included; style slender, = ovary, stigmas 2. Fruit: indehiscent, ± 2 mm. Seed: vertical, lenticular, black or brown.Key to Nitrophila
± 5 species: western United States, Central America, South America. (Greek: soda loving) [Müller & Borsch 2005 Ann Missouri Bot Gard 92:66–102] In Chenopodiaceae in TJM (1993).
Previous taxon: Guilleminea densa var. aggregata
Next taxon: Nitrophila mohavensis
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 23 2014
Citation for this treatment: [Author of taxon treatment] 2012. Nitrophila, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=11503, accessed on Apr 23 2014
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