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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 shrub, matted or not. Stem: prostrate to erect, occasionally 0, glabrous or hairy, occasionally glandular. Leaf: basal, sheathing (on stem above basal, beneath other, ± non-sheathing cauline), or cauline, alternate, opposite, or whorled; blades linear to ± round, generally longer than wide, margins flat, wavy, or rolled under; ocreae 0. Inflorescence: variable, glabrous or hairy, occasionally glandular; peduncles 0 or erect to reflexed (pointed down); involucres 1 or in clusters, tubular, glabrous or hairy, teeth generally 4–10, awns 0. Flower: (2)6–100(200), with a stalk-like base ("flower stipe" or "stipe") or not; perianth generally white to red or yellow, glabrous or hairy, occasionally glandular, lobes 6, generally entire; stamens 9. Fruit: generally brown or black, generally obconic, glabrous or hairy; embryo curved or straight.Key to Eriogonum
± 250 species: temperate North America. (Greek: woolly knees, for hairy nodes of 1st sp. named) One of largest genera in California; stem in descriptions refers to the main stem(s), not branches of inflorescence. A perennial herb allied to Eriogonum austrinum (S. Stokes) Reveal and Eriogonum moranii Reveal of east-central Baja California, with spreading (rather than reflexed or erect) involucres on peduncles < 2 mm, occurring in Desert Mountains (Bristol, Granite mountains), has been known for nearly 25 years yet remains undescribed. Eriogonum puberulum moved to Johanneshowellia.
Annual 1–8 dm. Stem: 0.5–3 dm, sparsely tomentose to hairy. Leaf: basal and cauline; blades (0.5)1–3(5) cm, (0.3)0.5–1(2) cm wide, generally tomentose. Inflorescence: 10–70 cm, 10–45 cm wide; branches sparsely tomentose to hairy; involucres appressed, (3.5)4–5 mm, 2–3 mm wide. Flower: 1.5–2(2.5) mm, glabrous; perianth white to pink or red, occasionally yellow, lobes narrowly obovate to oblong. Fruit: 1.8–2(2.2) mm.
n=9. Common. Sand or gravel; < 2200 m. Northwestern California, Sierra Nevada Foothills, Tehachapi Mountain Area, Central Western California, Transverse Ranges; southern Oregon, northern Baja California. [Eriogonum vimineum Douglas ex Benth. subsp. virgatum (Benth.) S. Stokes; Eriogonum virgatum Benth.; Eriogonum virgatum var. roseum (Durand & Hilg.) Torr. & A. Gray; Eriogonum virgatum var. rubidum Jeps. ex H.L. Bauer] May–Nov [Online Interchange]
Previous taxon: Eriogonum rosense var. rosense
Next taxon: Eriogonum rupinum
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Nov 25 2015
Citation for this treatment: [Author of taxon treatment] 2013. Eriogonum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=24922, accessed on Nov 25 2015
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|Geographic subdivisions indicated for the distribution of Eriogonum roseum|| 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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