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Eriogonum maculatum

Higher Taxonomy
Family: PolygonaceaeView DescriptionDichotomous Key

Habit: 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 [1]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.
Genera In Family: 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. Note: 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.
eFlora Treatment Author: Mihai Costea, except as noted
Genus: EriogonumView DescriptionDichotomous Key

Habit: 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.
Species In Genus: +- 250 species: temperate North America. Etymology: (Greek: woolly knees, for hairy nodes of 1st sp. named) Note: 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 DMtns (Bristol, Granite mountains), has been known for nearly 25 years yet remains undescribed. Eriogonum puberulum moved to Johanneshowellia.
eFlora Treatment Author: James L. Reveal & Thomas J. Rosatti

Eriogonum maculatum A. Heller
Habit: Annual 1--2(3) dm. Stem: 0.1--0.5 dm, tomentose. Leaf: basal and cauline; blades 0.5--3(4) cm, 0.3--1.5(2) cm wide, generally tomentose. Inflorescence: 5--25 cm, 10--30 cm wide; branches tomentose; peduncles spreading, (0.5)1--3 cm, straight or +- so, thread-like, glandular-hairy; involucres 1--1.5(2) mm, 1.5--3(3.5) mm wide, glandular-hairy. Flower: 1--2.5 mm, glandular-hairy; perianth white to yellow, pink or red, with a rose-purple spot, outer lobes elliptic to +- round, inflated base to middle, inner lanceolate. Fruit: 1--1.5 mm, glabrous. Chromosomes: n=20.
Ecology: Common. Sand to gravel; Elevation: 100--2500 m. Bioregional Distribution: s SN, TR, GB, D; Distribution Outside California: to eastern Washington, Utah, Arizona, northern Baja California. Flowering Time: Apr--Nov
Synonyms: Eriogonum angulosum Benth. var. flabellatum Gand.; Eriogonum angulosum subsp. maculatum (A. Heller) S. Stokes; Eriogonum angulosum var. maculatum (A. Heller) Jeps.; Eriogonum angulosum var. patens Gand.; Eriogonum angulosum var. pauciflorum Gand.; Eriogonum angulosum var. rectipes Gand.; Eriogonum cernuum Nutt. subsp. acutangulum (Gand.) S. Stokes; Eriogonum thurberi Torr. var. acutangulum Gand.
eFlora Treatment Author: James L. Reveal & Thomas J. Rosatti
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botanical illustration including Eriogonum maculatum


Citation for this treatment: James L. Reveal & Thomas J. Rosatti 2016. Eriogonum maculatum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 06, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 06, 2016.

Eriogonum maculatum
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© 2010 Neal Kramer
Eriogonum maculatum
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© 2015 Keir Morse
Eriogonum maculatum
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© 2009 Steve Matson
Eriogonum maculatum
click for enlargement
© 2011 Neal Kramer
Eriogonum maculatum
click for enlargement
© 2015 Keir Morse
Eriogonum maculatum
click for enlargement
© 2015 Keir Morse

More photos of Eriogonum maculatum in CalPhotos

Geographic subdivisions for Eriogonum maculatum:
s SN, TR, GB, D;
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.
map of distribution 1
(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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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.