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Ivesia aperta var. aperta

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
Species: Ivesia apertaView Description 

Habit: Plant tufted, +- green or white-hairy; caudex 0--few-branched. Stem: 15--45 cm. Leaf: 10--20 cm; sheathing bases densely strigose; leaflets 20--35 per side, lobes < 5, 3--15 mm, elliptic to oblanceolate; cauline leaves 3--8. Inflorescence: open; clusters many, +- head-like, 10--20 mm wide; pedicels generally < 3 mm (except lowest), straight. Flower: 5--15 mm wide; hypanthium length <= width; petals < to > sepals, yellow; stamens generally 20; pistils 2--7. Fruit: 2--3 mm, smooth, brown.

Ivesia aperta (J.T. Howell) Munz var. aperta
Stem: generally ascending to erect. Inflorescence: clusters generally > 10-flowered. Flower: hypanthium 2--3 mm wide; petals 2--3 mm, oblanceolate; filaments 1--1.5 mm; style +- 2.5 mm.
Ecology: Dry, rocky meadows, generally volcanic soils; Elevation: 1500--2300 m. Bioregional Distribution: n SNH (exc Dog Valley), s MP; Distribution Outside California: western Nevada. Flowering Time: Jun--Aug
Unabridged Note: With Ivesia sericoleuca near Beckwith, Sierra Valley.
eFlora Treatment Author: Barbara Ertter
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

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botanical illustration including Ivesia aperta var. aperta


Citation for this treatment: Barbara Ertter 2017. Ivesia aperta var. aperta, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 29, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on April 29, 2017.

Ivesia aperta var. aperta
click for enlargement
© 2002 Gary A. Monroe
Ivesia aperta var. aperta
click for enlargement
© 2002 Gary A. Monroe
Ivesia aperta var. aperta
click for enlargement
© 2002 Gary A. Monroe
Ivesia aperta var. aperta
click for enlargement
© 2002 Gary A. Monroe

More photos of Ivesia aperta var. aperta in CalPhotos

Geographic subdivisions for Ivesia aperta var. aperta:
n SNH (exc Dog Valley), s MP;
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).

View elevation by latitude chart
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.