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Ivesia gordonii

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, participant in Pacific Railroad Survey, 1779--1861) Note: Leaf, leaflet data for basal leaves.
eFlora Treatment Author: Barbara Ertter

Ivesia gordonii (Hook.) Torr. & A. Gray
Habit: Plant tufted, green; caudex +- branched. Stem: 5--20 cm. Leaf: generally 3--8 cm; sheathing bases +- glandular; leaflets generally 10--16 per side, overlapped but distinct, lobes 4--8, generally 2--5 mm, oblanceolate to obovate; cauline leaf generally 1. Inflorescence: cluster generally 1, generally head-like, 10--30 mm wide, 10--20-flowered; pedicels generally < 3 mm, straight. Flower: 5--9 mm wide; hypanthium length >= width; petals 2--3 mm, <= sepals, narrow-oblanceolate, yellow; stamens 5; pistils generally 2--4. Fruit: +- 2 mm, +- smooth, mottled brown.
Note: Varieties tentatively distinct in California.
Unabridged Note: Other varieties from eastern Idaho and Utah to Montana, Wyoming, Colorado.
eFlora Treatment Author: Barbara Ertter
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botanical illustration including Ivesia gordonii


Citation for this treatment: Barbara Ertter 2016. Ivesia gordonii, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 25, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 25, 2016.

Ivesia gordonii
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© 2002 Gary A. Monroe
Ivesia gordonii
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© 2010 Julie Kierstead Nelson
Ivesia gordonii
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© 2014 Julie Kierstead Nelson
Ivesia gordonii
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© 2012 Gary A. Monroe
Ivesia gordonii var. ursinorum
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© 2014 Steve Matson
Ivesia gordonii var. alpicola
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© 2013 Barry Breckling

More photos of Ivesia gordonii in CalPhotos

Geographic subdivisions for Ivesia gordonii:
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.
Blue line denotes eFlora flowering time.