Tiarella trifoliata
Sp. Pl. 1: 406. 1753 ,.
Common names: Three-leaf foamflower
Treatment appears in FNA Volume 8. Treatment on page 115.
Revision as of 18:05, 18 September 2019 by FNA>Volume Importer
Flowering stems 10–70 cm
Distribution
w North America.
Discussion
Varieties 3 (3 in the flora).
Varieties of Tiarella trifoliata have overlapping ranges and differ from each other in leaf form and marginal dissection. Their floral features are stable throughout. They were previously suspected of hybridizing when sympatric. They are differentiated along elevational gradients and often remain distinct in sympatric populations.
Selected References
None.
Lower Taxa
Key
| 1 | Basal leaves usually simple; cauline leaves rarely trifoliolate, shallowly to deeply lobed, leaflets sessile. | Tiarella trifoliata var. unifoliata |
| 1 | Basal leaves 3-foliolate; cauline leaves 3-foliolate; leaflets deeply lobed, petiolulate | > 2 |
| 2 | Leaflet lobes to 1/2 length of leaflet, distal segments not laciniate. | Tiarella trifoliata var. trifoliata |
| 2 | Leaflet lobes more than 1/2 length of leaflet, distal segments laciniate. | Tiarella trifoliata var. laciniata |