Jepson eFlora: Taxon page
Vascular Plants of California
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Trillium
WAKEROBIN, TRILLIUM

Higher Taxonomy
Family: MelanthiaceaeView DescriptionDichotomous Key

Common Name: FALSE-HELLEBORE FAMILY
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.
Trillium
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.
Jepson eFlora Author: Dale W. McNeal & Bryan D. Ness
Reference: Farmer 2006 Aliso 22:579--592; Freeman 1975 Brittonia 27:1--62
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Key to Trillium

Previous taxon: Toxicoscordion venenosum var. venenosum
Next taxon: Trillium albidum

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Citation for this treatment: Dale W. McNeal & Bryan D. Ness 2012, Trillium, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=9561, accessed on April 23, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 23, 2024.