Jepson eFlora: Taxon page
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 ornament, 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.
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
NATIVE
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
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Ivesia saxosa

botanical illustration including Ivesia saxosa

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Citation for this treatment: Barbara Ertter 2012, Ivesia saxosa, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=29469, accessed on April 18, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 18, 2024.

Ivesia saxosa
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©2001 Larry Blakely
Ivesia saxosa
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©2015 Keir Morse
Ivesia saxosa
click for enlargement
©2015 Keir Morse
Ivesia saxosa
click for enlargement
©2015 Keir Morse
Ivesia saxosa
click for enlargement
©2015 Keir Morse

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Geographic subdivisions for Ivesia saxosa:
s SNH, SnBr, PR, SNE, DMtns
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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).





 

Data provided by the participants of the  Consortium of California Herbaria.
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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 (fruiting time in some monocot genera).