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Vascular Plants of California
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Ivesia 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, 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 aperta (J.T. Howell) Munz
NATIVE
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.

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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Citation for this treatment: Barbara Ertter 2012, Ivesia aperta, in Jepson Flora Project (eds.) Jepson eFlora, /eflora/eflora_display.php?tid=29437, accessed on October 26, 2020.

Citation for the whole project: Jepson Flora Project (eds.) 2020, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on October 26, 2020.

Ivesia aperta var. aperta
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© 2002 Gary A. Monroe
Ivesia aperta var. canina
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© 2012 Gary A. Monroe
Ivesia aperta var. canina
click for enlargement
© 2006 Steve Matson
Ivesia aperta var. canina
click for enlargement
© 2012 Gary A. Monroe
Ivesia aperta var. canina
click for enlargement
© 2006 Steve Matson
Ivesia aperta var. canina
click for enlargement
© 2010 Neal Kramer

More photos of Ivesia aperta var. canina in CalPhotos



Geographic subdivisions for Ivesia aperta:
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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).