Genus: Trinity flower

Trillium

Photo/Illustration: 
Jennifer Brown
Trinity flower (Trillium)
TRILL-ee-um
Liliaceae
Most plants in the Trillium genus are native to woodlands and scrub of North America. They have three whorled leaves at their apexes, and nodding or upright blossoms with three whorled petals. They make an elegant understory species planted in groups in a woodland or shady mixed border. Plant Trillium with other shade-loving perennials to share their place until the reappear the following spring.
Noteworthy characteristics:  These quiet woodland beauties signal spring with their petals and leaves of three, and then disappear when the season heats up.
Care:  Grow in full to partial shade and rich, moist, but well-drained soil with a neutral to acidic pH. Provide with an annual mulch of rich organic matter.
Propagation: 

Trilliums propagate readily by division (when dormant in late summer or early fall), but take from 7 to 9 years to bloom from seed.

Problems: 

Smut, rust, fungal spots, slugs, snails.

Species, varieties and clutivars for genus Trillium

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Giant trillium
Trillium chloropetalum
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Red trillium
Trillium erectum
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White trillium
Trillium erectum var. album
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Bent trillium
Trillium flexipes
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Great white trillium
Trillium grandiflorum
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Yellow trillium
Trillium luteum
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Dwarf wakerobin
Trillium pusillum
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Prairie trillium
Trillium recurvatum
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Propeller toad shade
Trillium stamineum
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Sweet Beth
Trillium vaseyi