Jepson eFlora: Taxon page
Vascular Plants of California
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Ivesia webberi
WEBBER'S IVESIA


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 webberi A. Gray
NATIVE
Habit: Plant rosetted, green; caudex generally simple. Stem: decumbent to ascending, generally 5--15 cm. Leaf: 3--7 cm; sheathing bases strigose; leaflets 4--8 per side, lobes 5--12, 3--10 mm, linear to lanceolate; cauline 2, +- opposite (unique in Ivesia). Inflorescence: cluster 1, 15--50 mm wide, head-like (open in fruit), 5--15-flowered; pedicels generally 2--5 mm, straight. Flower: 8--12 mm wide; hypanthium length 1/2 width; petals generally 2--3 mm, < sepals, oblanceolate, yellow; stamens 5; pistils +- 5. Fruit: 2.5 mm, +- smooth, light brown, mottled darker.
Ecology: Rocky clay in sagebrush flats; Elevation: 1500--1900 m. Bioregional Distribution: n SNH (Dog Valley, e Sierra Co.), s MP (Sierra Valley); Distribution Outside California: western Nevada. Flowering Time: May--Jun
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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Citation for this treatment: Barbara Ertter 2012, Ivesia webberi, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=29467, accessed on September 19, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on September 19, 2019.

Ivesia webberi
click for enlargement
© 2007 Steve Matson
Ivesia webberi
click for enlargement
© 2012 Gary A. Monroe
Ivesia webberi
click for enlargement
© 2007 Steve Matson
Ivesia webberi
click for enlargement
© 2007 Steve Matson
Ivesia webberi
click for enlargement
© Carol Witham and CNPS
Ivesia webberi
click for enlargement
© 2012 Gary A. Monroe

More photos of Ivesia webberi in CalPhotos



Geographic subdivisions for Ivesia webberi:
n SNH (Dog Valley, e Sierra Co.), s MP (Sierra Valley)
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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.