| |
| | 2. Stamens < 1.25 × ovary length; flower generally with musty or fetid odor; w Klamath Ranges, Sierra Nevada, ScoRO |
| T. angustipetalum |
| | 2' Stamens ± 2 × ovary length; flower generally with sweet rose-like or ± spicy scent; Northwestern California, Cascade Range, n Sierra Nevada, San Francisco Bay Area |
| |
| | 3. Ovary and tissue between anther sacs greenish; petals white to pink (base sometimes purplish); Northwestern California, Cascade Range, n Sierra Nevada, San Francisco Bay Area |
| T. albidum |
| | 3' Ovary and tissue between anther sacs purple; petals yellow to purple (sometimes white); Inner North Coast Ranges, San Francisco Bay Area |
| T. chloropetalum |
| |
| | 4. Leaves generally petioled; flower recurved to nodding; petals ovate-cordate, white, generally purple-spotted; Klamath Ranges |
| T. rivale |
| | 4' Leaves ± sessile; flower erect to nodding; petals linear to ovate, white, aging pink; Northwestern California, Central Western California |
| T. ovatum |
| | 5. Petals < 20 mm (often < 15 mm), < 6 mm wide; flower ± nodding; > 1200 m; Klamath Ranges |
| subsp. oettingeri |
| | 5' Petals generally > 15 mm, > 6 mm wide; flower generally ± erect; < 1600 m; Northwestern California, Central Western California |
| subsp. ovatum
|