Trientalis borealis Raf. - Starflower


|  back  | forward |

Trientalis borealis - (image 1 of 6)



Family: Primulaceae


Synonymous with Trientalis americana Pursh


Rich woods and shaded parts of bogs or swamps.




Labrador and Newfoundland west to Alberta, south to PA, northern OH, northern IL, and MN.


Perennial to 20 cm from a slender rhizome. Leaves whorled at the top of the stem, lanceolate, acuminate, 4-10 cm; a small, scale-like leaf also usually present near the middle of the stem. Flowers usually 7-merous, solitary on one to few pedicels 2-5 cm; sepals lance-linear; corolla rotate with a very short tube, 8-14 cm wide, the lobes acuminate and mucronate; stamens at the base of the corolla; filaments slender, connected by a membranous ring. Fruit a 5-valved capsule, many-seeded.


Flowers May to June

Wetland indicator: Facultative +

The 7-parted flowers are rather distinctive.


Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.

The New York Botanical Garden. Bronx, NY


Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.




 Michael Hough 2005