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Vascular Plants of California
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Ivesia muirii


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 muirii A. Gray
NATIVE
Habit: Plant tufted, silvery; caudex generally simple. Stem: ascending to erect, generally 5--15 cm. Leaf: 2--5 cm, mousetail-like; sheathing bases densely strigose; leaflets 25--40 per side, indistinct, lobes +- 3, < 1 mm, obovate to round; cauline leaf 1, generally +- bract-like. Inflorescence: clusters 1--few, head-like, 10--15 mm wide, generally 10--20-flowered; pedicels +- < 2 mm, straight. Flower: 5--6 mm wide; hypanthium length 1/2--1 × width; petals 1--2 mm, +- = sepals, narrow-oblong to -oblanceolate, pale yellow; stamens 5; pistils 1--4. Fruit: +- 2 mm, smooth, gray spotted red.
Ecology: Rocky areas; Elevation: 2900--4000 m. Bioregional Distribution: c&s SNH. Flowering Time: Jul--Aug Note: Intermediates with Ivesia pygmaea in southern SNH (Center Basin) may be hybrids.
Unabridged Synonyms: Horkelia chandleri Rydb.
Jepson eFlora Author: Barbara Ertter
Reference: Ertter & Reveal 2007 Novon 17:315--325
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Botanical illustration including Ivesia muirii

botanical illustration including Ivesia muirii

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Citation for this treatment: Barbara Ertter 2012, Ivesia muirii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=29451, accessed on October 13, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on October 13, 2019.

Ivesia muirii
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© 2009 Barry Breckling
Ivesia muirii
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© 2009 Barry Breckling
Ivesia muirii
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© 2011 Neal Kramer
Ivesia muirii
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© 1987 Gary A. Monroe
Ivesia muirii
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© 2011 Neal Kramer
Ivesia muirii
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© 2005 Steve Matson

More photos of Ivesia muirii in CalPhotos



Geographic subdivisions for Ivesia muirii:
c&s SNH.
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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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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.
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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.