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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 [tree]. Stem: nodes swollen or not. Leaf: simple, basal or cauline, generally alternate; ocreae present or 0, generally scarious, persistent or not. Inflorescence: flower clusters in axillary to terminal cyme-, panicle-, raceme-, spike-, umbel- or head-like arrangements, entire inflorescence or main inflorescence branches generally subtended by bracts ("inflorescence bracts"); peduncles present or 0; flower clusters in Eriogoneae-Eriogonoideae subtended by involucre of >= 1 free or ± fused, sometimes awn-tipped bracts ("involucre bracts") or, in Polygonoideae and rarely in Eriogonoideae, not (if bracts completely fused, involucre "tubular"); pedicels in Eriogoneae each often subtended by 2 free, transparent, linear bractlets or in Polygonoideae all subtended by 2+ fused, membranous, wide bractlets. Flower: generally bisexual, small, 1–200 per node; perianth parts 2–6, generally in 2 whorls, free or basally fused, generally petal-like, often ± concave adaxially, often darker at midvein, often turning ± red or ± brown in age; stamens 3 or 6–9 in 2 whorls; ovary superior, 1-chambered, ovule 1, styles 1–3. Fruit: achenes, included in or exserted from perianth, generally 3-angled, ovoid or elliptic, generally glabrous.
48 genera, ± 1200 species: worldwide, especially northern temperate; some cultivated for food (Coccoloba, sea-grape; Fagopyrum, Rheum, Rumex) or ornamental (Antigonon, lovechain; Coccoloba; Muehlenbeckia; Persicaria; Polygonum), a few timbered (Coccoloba; Triplaris). Several (Emex; Fallopia; Persicaria; Polygonum; Rumex) are weeds. [Freeman & Reveal 2005 FNANM 5:216–601] Treatment of genera in Eriogonoideae based on monographic work of James L. Reveal. Involucre number throughout is number (1–many) per ultimate grouping, at tips of ultimate branches; flower number is per flower cluster or involucre, unless otherwise stated. Fagopyrum esculentum Moench not naturalized, considered an historical waif (or garden weed ± presently), therefore not treated. Scientific Editors: Thomas J. Rosatti, Bruce G. Baldwin.
Key to Polygonaceae
Annual to perennial herb; glabrous or papillate and hairy; rhizomed, stoloned, or generally from taproot with a short caudex; occasionally dioecious. Stem: prostrate, decumbent, or generally erect to ascending, often ± ridged, red-brown in fruit, nodes ± swollen. Leaf: generally basal and cauline, alternate, petioled except uppermost cauline; ocreae deciduous to persistent. Inflorescence: axillary or generally terminal, generally panicle-like. Flower: generally bisexual, bell-shaped, glabrous, green, ± pink, or red; perianth lobes 6, persistent, in fruit outer 3 ± inconspicuous, inner 3 enlarged, hardened, ± veiny, covering fruit, midrib of 1–3 often expanded into tubercle; stamens 6; stigmas 3, fringed. Fruit: achene, glabrous, ± black or dark brown to ± red.Key to Rumex
190–200 species: ± worldwide, 63 in North America. (Latin: sorrel) Mature inner perianth lobes generally needed for identification. Species often hybridize.
Perennial herb, glabrous, papillate or not; taproot vertical. Stem: 6–12(15) dm, generally branched. Leaf: blade 20–40 cm, 10–15 cm wide, widely ovate to oblong, base generally cordate, margin generally entire, flat, tip obtuse to ± acute. Inflorescence: terminal, open, interrupted below, branches generally ascending; whorls 10–25-flowered; pedicels 2.5–8.5(10) mm, thread-like, joints swollen. Flower: inner perianth lobe 3–6 mm, 2–3.5 mm wide except teeth, triangular to narrowly ovate-triangular, base truncate, margin generally dentate with teeth 2–5, 0.5–1.8 mm, tip obtuse to ± acute; tubercles 3, 1 larger, or generally 1, smooth. Fruit: 2–2.7 mm, 1.2–1.7 mm wide, brown to red-brown.
2n=40. Moist places; < 2000 m. North Coast, Outer North Coast Ranges, n Sierra Nevada, Great Central Valley, Central Coast, San Francisco Bay Area, South Coast, expected elsewhere; throughout North America; native to Europe, western Asia. Hybridizes with Rumex crispus, other Europe species. May–Sep [Online Interchange]
Previous taxon: Rumex lacustris
Next taxon: Rumex occidentalis
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Oct 9 2015
Citation for this treatment: [Author of taxon treatment] 2013. Rumex, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=42409, accessed on Oct 9 2015
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|Geographic subdivisions indicated for the distribution of Rumex obtusifolius|| 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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