| Trillium chandleri Farw. (synonym) |
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| Trillium chandleri forma foliaceum Farw. (synonym) |
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| Trillium chandleri forma gladewitzii Farw. (synonym) |
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| Trillium chandleri forma palaceum Farw. (synonym) |
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| Trillium chandleri forma plenum Farw. (synonym) |
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| Trillium chandleri forma subulatum Farw. (synonym) |
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| Trillium erythrocarpum Curtis, nom. illeg. (synonym) |
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| Trillium grandiflorum forma dimerum Louis-Marie (synonym) |
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| Trillium grandiflorum forma divisum Louis-Marie (synonym) |
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| Trillium grandiflorum forma elongatum Louis-Marie (synonym) |
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| Trillium grandiflorum var. minimum N.Coleman (synonym) |
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| Trillium grandiflorum forma petalosum Louis-Marie (synonym) |
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| Trillium grandiflorum forma regressum Louis-Marie (synonym) |
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| Trillium grandiflorum forma striatum Louis-Marie (synonym) |
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| Trillium lirioides Raf. (synonym) |
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| Trillium lirioides forma albomarginatum Farw. (synonym) |
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| Trillium lirioides forma giganteum Farw. (synonym) |
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| Trillium lirioides var. longipetiolatum Farw. (synonym) |
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| Trillium lirioides forma subsessile Farw. (synonym) |
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| Trillium lirioides forma ungulatum Farw. (synonym) |
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| Trillium lirioides forma variegatum Farw. (synonym) |
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| Trillium liroides forma vegetum Farw. (synonym) |
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| Trillium obcordatum Raf. (synonym) |
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| Trillium rhomboideum var. grandiflorum Michx. (synonym) |
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| Trillium scouleri Rydb. (synonym) |
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