Jepson eFlora: Taxon page
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Trillium ovatum subsp. ovatum

Higher Taxonomy
Family: MelanthiaceaeView DescriptionDichotomous Key

Habit: Perennial herb, from rhizome or bulb, or rhizomes ending in weakly developed bulbs, scapose or not. Leaf: alternate, whorled, or mostly basal and spirally arranged, deciduous after 1 year or not. Inflorescence: raceme, panicle, or flowers 1. Flower: perianth parts 6, in 2 petal-like whorls or of sepals and petals, free or fused below, +- spreading; stamens 6, from perianth, anthers attached at base or near middle; ovary superior or partly inferior, chambers 3, styles 3, persistent. Fruit: capsule, loculicidal or septicidal.
Genera In Family: 10 genera, 130 species: northern hemisphere. Note: W North America Zigadenus moved to Toxicoscordion.
eFlora Treatment Author: Dale W. McNeal, except as noted
Scientific Editor: Dale W. McNeal, Thomas J. Rosatti.
Genus: TrilliumView DescriptionDichotomous Key

Habit: Rhizome short, thick, spreading to erect. Stem: erect, >=1 per rhizome. Leaf: 3, in 1 whorl subtending flower, sessile or subsessile, +- ovate. Inflorescence: flowers 1 per stem, erect to nodding, stalked or sessile. Flower: bisexual; sepals 3, free, persistent, +- green; petals 3, free, withering, white, +- pink, +- yellow, or purple; stamens 6; ovary chambers 3, styles 3. Fruit: capsule, +- berry-like. Seed: many, ovoid.
Species In Genus: +- 30--40 species: North America, Asia. Etymology: (Latin: 3, from leaves) Note: Trillium rivale moved to Pseudotrillium.
eFlora Treatment Author: Dale W. McNeal & Bryan D. Ness
Species: Trillium ovatumView Description 

Stem: 1--7 dm. Leaf: 4--20 cm, 5--20 cm wide, acute to acuminate at tip, generally green, generally not spotted. Flower: erect to nodding, stalked; petals ascending, 0.5--7 cm, linear to widely obovate, white, aging pink; stamens 1.7--15 mm, tissue between anther sacs yellow or +- white. Fruit: obscurely winged, green or white. Chromosomes: n=5.

Trillium ovatum Pursh subsp. ovatum
Stem: 1.5--7 dm. Leaf: generally sessile. Flower: generally +- erect; sepals 1--6 cm, 2--24 mm wide, lanceolate; petals 1.5--7 cm, 5--45 mm wide, lance-oblong to widely obovate.
Ecology: Redwood, mixed-evergreen forest on moist wooded slopes; Elevation: 10--1600 m. Bioregional Distribution: NW, CW; Distribution Outside California: to western Canada, Colorado. Flowering Time: Feb--Apr
eFlora Treatment Author: Dale W. McNeal & Bryan D. Ness
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botanical illustration including Trillium ovatum subsp. ovatum


Citation for this treatment: Dale W. McNeal & Bryan D. Ness 2017. Trillium ovatum subsp. ovatum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on August 21, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on August 21, 2017.

Trillium ovatum subsp. ovatum
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© 2015 Barry Breckling
Trillium ovatum subsp. ovatum
click for enlargement
© 2015 Barry Breckling
Trillium ovatum subsp. ovatum
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© 2015 Aaron E. Sims and CNPS
Trillium ovatum subsp. ovatum
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© 2014 Barry Rice
Trillium ovatum subsp. ovatum
click for enlargement
© 2015 Barry Breckling
Trillium ovatum subsp. ovatum
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© 2016 Keir Morse

More photos of Trillium ovatum subsp. ovatum in CalPhotos

Geographic subdivisions for Trillium ovatum subsp. ovatum:
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.