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Additional contributors:

Subject-Keyword: Alberta

Type of item: Report

Language: English

Place: Canada, Alberta, Fort McMurray


Description: Species profile for Trientalis borealis: northern starflower

Date created: 2013-10-18

DOI: doi:10.7939-R3RN30B4S

License information: Creative Commons Attribution 3.0 Unported


Autor: Smreciu, A. Gould, K. Wood, S.



Scientific name: Trientalis borealis Raf. Family: Primulaceae Common Names: northern starflower 5 to 9 at stem tip, sessile or short-petiolate, entire or finely crenulated; single (or sometimes up to three) white flowers 8 to 14 mm wide on slender stalks from center of leaf cluster; ovate or lanceolate 5 to 9 petals, long acuminate (Moss 1983). Fruit: Spherical, five-chambered dry, brown capsules, 2.2 mm in diameter (Anderson and Loucks 1973). Seed: Seeds are 7.5 mm long and 7.5 mm wide, brown in colour with a thick, very white outer coat with small spots. Habitat and Distribution Found in moist woods.
Shade tolerant. Seral Stage: Mid to late seral. Soils: Sandy, acidic soil with pH 5 to 6 (Rook 2002). Distribution: Across boreal forest of prairie provinces and the northern conifer hardwoods in the USA, and from the east coast west to Great Slave Lake (Anderson and Loucks 1973). British Columbia, Alberta to northern Quebec, Newfoundland south to California, Idaho, Saskatchewan, southern Manitoba, Great Lakes, Georgia, Virginia; Yukon (Moss 1983). Trientalis borealis a.
entire plant including flower, leaves, stem, rhizome and roots b.
flower detail c.
pollen d.
seed. Plant Description Perennial herb, erect stems 6 to 18 cm high, glabrous or minutely glandular, from slender creeping rhizomes, approximately 30 cm long; leaves are thin lanceolate, acuminate 3 to 10 cm long, in whorls of Trientalis borealis in its natural habitat. Phenology Flowers May to early June; fruit ripens in July; rhizomes are initiated in June to end of July; tubers start to form during the second and third week of July or early August (Anderson and Loucks 1973). Pollination Pollinated by bumblebees (Rook 2002), syrphid flies and solitary bees (Anderson and Beare 1983). Self-incompatible with 83% fruit set when crosspollinated and only 2% fruit set when self-pollinated (Anderson and Beare 1983). Seed Dispersal Unknown.
Likely scattered by passing animals, brushing seed from stems. Genetics...

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