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Eriogonum nudum var. pauciflorum

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
Scientific Editor: Thomas J. Rosatti, Bruce G. Baldwin.
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.
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
Species: Eriogonum nudumView Description 

Habit: Perennial herb (0.5)1--15(20) cm, 0.5--3 dm diam. Stem: 0.3--4(10) dm, glabrous or tomentose to hairy, occasionally inflated. Leaf: basal or sheathing up stem; blades 1--6 cm, (0.3)1--4 cm wide, tomentose abaxially, tomentose to hairy or glabrous adaxially. Inflorescence: rarely head-like, 2--100(150) cm, 2--40(80) cm diam; branches glabrous or tomentose to hairy; peduncles 0; involucres 1--10, (2.5)3--5(7) mm, (1.5)2--4 mm wide, glabrous or tomentose to hairy; teeth 5--8. Flower: (1.5)2--4 mm, glabrous or hairy; perianth white or yellow to pink or rose, lobes oblong to obovate. Fruit: 1.5--3.5 mm, glabrous.

Eriogonum nudum Benth. var. pauciflorum S. Watson
Habit: Plant 3--8 dm. Stem: 1.5--5 dm, glabrous, rarely inflated. Leaf: basal; blades 1.5--3 cm, 0.8--1.8 cm wide, tomentose, glabrous adaxially. Inflorescence: 20--50 cm, 10--30 cm wide; branches glabrous; involucres 1(2), 5--7 mm, glabrous or sparsely hairy. Flower: 2--2.5 mm, hairy (or glabrous); perianth white or yellow. Chromosomes: n=20.
Ecology: Sand; Elevation: 1100--2800 m. Bioregional Distribution: TR, PR; Distribution Outside California: northern Baja California. Flowering Time: Jun--Oct
Synonyms: Eriogonum latifolium Sm. subsp. pauciflorum (S. Watson) S. Stokes; Eriogonum nudum subsp. pauciflorum (S. Watson) Munz; Eriogonum nudum var. perturbum M.E. Jones, illeg.
Jepson eFlora Author: James L. Reveal & Thomas J. Rosatti
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Citation for this treatment: James L. Reveal & Thomas J. Rosatti 2012, Eriogonum nudum var. pauciflorum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on September 21, 2023.

Citation for the whole project: Jepson Flora Project (eds.) 2023, Jepson eFlora,, accessed on September 21, 2023.

Eriogonum nudum var. pauciflorum
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© 2015 Keir Morse
Eriogonum nudum var. pauciflorum
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© 2014 Steve Matson
Eriogonum nudum var. pauciflorum
click for enlargement
© 2015 Keir Morse
Eriogonum nudum var. pauciflorum
click for enlargement
© 2014 Steve Matson
Eriogonum nudum var. pauciflorum
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© 2011 Neal Kramer
Eriogonum nudum var. pauciflorum
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© 2003 Christopher L. Christie

More photos of Eriogonum nudum var. pauciflorum in CalPhotos

Geographic subdivisions for Eriogonum nudum var. pauciflorum:
1. You can change the display of the base map layer control box in the upper right-hand corner.
2. County and Jepson Region polygons can be turned off and on using the check boxes.
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).


Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).