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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 Editor: Thomas J. Rosatti.
Key to Polygonaceae
Shrub, vine-like, climbing or, if support 0, forming dense, sprawling, twisted masses, rhizomed. Stem: to 10 m, slender, wiry, branches many. Leaf: cauline, alternate, petioled, ± deciduous; ocreae delicate, early-deciduous; blade linear to round or lance-triangular, ± thick, margins entire or irregularly wavy. Inflorescence: axillary, terminal, raceme- or spike-like; flowers 1–3(5); peduncles ± 0. Flower: bisexual, staminate, or pistillate (all three on 1 plant or not); perianth parts 5, fused 1/4–1/2, enlarging, fleshy in fruit, white to green-white to -yellow; stamens 8; style rudimentary, stigmas 3, much-branched. Fruit: ± included in fleshy perianth, appearing berry-like; 3-angled to ± spheric, smooth.Key to Muehlenbeckia
23 species: South America, Central America, New Zealand, Australia. (H.G. Muehlenbeck, Alsatian physician, 1798–1845)
Previous taxon: Mucronea perfoliata
Next taxon: Muehlenbeckia complexa
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 16 2014
Citation for this treatment: [Author of taxon treatment] 2013. Muehlenbeckia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=11218, accessed on Sep 16 2014
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