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Vascular Plants of California
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Ivesia saxosa

Higher Taxonomy
Family: RosaceaeView DescriptionDichotomous Key
Common Name: ROSE FAMILY
Habit: Annual to tree, glandular or not. Leaf: simple to palmately or pinnately compound, generally alternate; stipules free to fused (0), persistent to deciduous. Inflorescence: cyme, raceme, panicle, cluster, or flowers 1; bractlets on pedicel ("pedicel bractlets") generally 0--3(many), subtended by bract or generally not. Flower: generally bisexual, radial; hypanthium free or fused to ovary, saucer- to funnel-shaped, subtending bractlets ("hypanthium bractlets") 0--5, alternate sepals; sepals generally 5; petals generally 5, free; stamens (0,1)5--many, anther pollen sacs generally 2; pistils (0)1--many, simple or compound, ovary superior to inferior, styles 1--5. Fruit: 1--many per flower, achene (fleshy-coated or not), follicle, drupe, or pome with generally papery core, occasionally drupe-like with 1--5 stones. Seed: generally 1--5 (per fruit, not per flower).
Genera In Family: 110 genera, +- 3000 species: worldwide, especially temperate; many cultivated for ornamental, fruit, especially Cotoneaster, Fragaria, Malus, Prunus, Pyracantha, Rosa, Rubus. Note: Number of teeth is per leaf or leaflet, not per side of leaf or leaflet, except in Drymocallis.
eFlora Treatment Author: Daniel Potter & Barbara Ertter, family description, key to genera, treatment of genera by Daniel Potter, except as noted
Scientific Editor: Daniel Potter, Thomas J. Rosatti.
Genus: IvesiaView DescriptionDichotomous Key

Habit: Perennial herb, glandular; odor resinous. Leaf: generally basal, odd-1-pinnately compound, generally +- cylindric; cauline generally alternate, reduced; leaflets 4--80 per side, generally overlapped, generally divided +- to base. Inflorescence: cyme; pedicel bractlets 0. Flower: receptacle generally not stalked; hypanthium shallow or deep, bractlets (0)5, generally < sepals; petals generally 5, 1--5(7) mm, linear to obovate or round, acute to rounded; stamens 5--20(40), filaments generally thread-like; pistils 1--8(20), ovary superior, style attached below fruit tip, base +- rough-thickened. Fruit: achene.
Species In Genus: 30 species: western North America. Etymology: (Eli Ives, Yale University, Connecticut pharmacologist, 1779--1861) Note: Leaf, leaflet data for basal leaves.
eFlora Treatment Author: Barbara Ertter
Reference: Ertter & Reveal 2007 Novon 17:315--325
Unabridged Reference: Ertter 1989 Syst Bot 14:231--244
Ivesia saxosa (Lemmon ex Greene) Ertter
Habit: Plants hanging clumps, green. Stem: 5--30 cm. Leaf: generally 5--15 cm, flat; sheathing bases +- glabrous; leaflets 2--4 per side, separated, generally 5--15 mm, +- round, evenly shallow-toothed to unevenly lobed +- to base; cauline leaves 2--4. Inflorescence: open, few- to many-flowered; pedicels 7--30 mm, generally +- S-shaped in fruit. Flower: 7--10 mm wide; hypanthium length < 1/2 width; petals 2--4 mm, < sepals, oblanceolate to obovate, yellow; stamens 15--40; pistils 3--20. Fruit: 1--1.5 mm, +- ridged, pale.
Ecology: Granitic or volcanic crevices; Elevation: 900--3300 m. Bioregional Distribution: s SNH, SnBr, PR, SNE, DMtns; Distribution Outside California: northern Baja California. Flowering Time: Apr--Aug
Synonyms: Potentilla rosulata Rydb.; Potentilla saxosa Greene; Potentilla saxosa subsp. sierrae Munz
Jepson eFlora Author: Barbara Ertter
Reference: Ertter & Reveal 2007 Novon 17:315--325
Unabridged Reference: Ertter 1989 Syst Bot 14:231--244
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Botanical illustration including Ivesia saxosa

botanical illustration including Ivesia saxosa


Citation for this treatment: Barbara Ertter 2012, Ivesia saxosa, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 19, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora,, accessed on April 19, 2019.

Ivesia saxosa
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© 2015 Keir Morse
Ivesia saxosa
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© 2002 Gary A. Monroe
Ivesia saxosa
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© 2009 Steve Matson
Ivesia saxosa
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© 2008 Michael Charters
Ivesia saxosa
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© 2015 Keir Morse
Ivesia saxosa
click for enlargement
© 2015 Keir Morse

More photos of Ivesia saxosa in CalPhotos

Geographic subdivisions for Ivesia saxosa:
s SNH, SnBr, PR, SNE, DMtns;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.