| Scientific Name | Trillium petiolatum Pursh |
| Family | Melanthiaceae |
| Common Names | purple trillium, purple wakerobin |
| Eastern Washington | Native |
| Synonyms | None |
| Conservation Status | |
| Notes |
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Along Deadman Cr. near the entrance to Mt. Spokane State Park – Spokane Co., WA – 5/4/2007 
Along Deadman Cr. near the entrance to Mt. Spokane State Park – Spokane Co., WA – 5/4/2007 
East edge of South Twin Lake W of Inchelium, WA; N 48.269084 W 118.375547 – Ferry Co. – 5/11/2011 
East edge of South Twin Lake W of Inchelium, WA; N 48.269084 W 118.375547 – Ferry Co. – 5/11/2011 
Along Deadman Cr. near the entrance to Mt. Spokane State Park – Spokane Co., WA – 5/4/2007 
Along Deadman Cr. near the entrance to Mt. Spokane State Park – Spokane Co., WA – 5/4/2007 East edge of South Twin Lake W of Inchelium, WA; N 48.269084 W 118.375547 – Ferry Co. – 5/11/2011 
1.7 mi NE from 1st rail crossing on Anderson Rd (off Cheney-Spokane Hwy); 47 30 682N 117 30 968W – Spokane Co., WA – 5/31/2009 
1.7 mi NE from 1st rail crossing on Anderson Rd (off Cheney-Spokane Hwy); 47 30 682N 117 30 968W – Spokane Co., WA – 5/31/2009 East edge of South Twin Lake W of Inchelium, WA; N 48.269084 W 118.375547 – Ferry Co. – 5/11/2011 East edge of South Twin Lake W of Inchelium, WA; N 48.269084 W 118.375547 – Ferry Co. – 5/11/2011