Jepson eFlora: Taxon page
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Trillium albidum

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

Trillium albidum J.D. Freeman
Stem: 2--6 dm. Leaf: sessile, 7--20 cm, 12--15 cm wide, rounded to obtuse at tip, generally weakly +- brown- or green-spotted. Flower: sessile; odor generally sweet rose-like or +- spicy; sepals spreading, 3--6.5 cm, lanceolate; petals erect to ascending, 4--8 cm, oblanceolate to obovate, white to +- pink, base occasionally +- purple; stamens 15--25 mm, tissue between anther sacs +- green; ovary +- green (+- purple). Fruit: green or +- purple, pulpy, juicy. Chromosomes: n=5.
Ecology: Common. Edges of redwood or mixed-evergreen forest, coastal scrub, chaparral, moist canyon slopes, ravine banks; Elevation: < 2000 m. Bioregional Distribution: NW, CaR, n SN, SnFrB; Distribution Outside California: to Washington. Flowering Time: Feb--Jun
eFlora Treatment Author: Dale W. McNeal & Bryan D. Ness
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botanical illustration including Trillium albidum


Citation for this treatment: Dale W. McNeal & Bryan D. Ness 2017. Trillium albidum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 17, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on October 17, 2017.

Trillium albidum
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© 2007 Aaron Schusteff
Trillium albidum
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© 2008 Keir Morse
Trillium albidum
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© 2010 Vernon Smith
Trillium albidum
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© 2008 Keir Morse
Trillium albidum
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© 2016 Keir Morse
Trillium albidum
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© 2007 Neal Kramer

More photos of Trillium albidum in CalPhotos

Geographic subdivisions for Trillium albidum:
NW, CaR, n SN, SnFrB;
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.
View all CCH records

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.