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broad-leaf starflower, northern starflower, starflower, western starflower

starflower

Habit Herbs, perennial, not succulent, glabrous or glandular; resin canals rarely obvious.
Rhizomes

slender or tuberous;

roots fibrous.

Stems

10–25 cm.

erect, usually simple.

Leaves

mostly whorled at stem apex, some alternate on proximal stem;

blades of distal leaves elliptic to suborbiculate, (2.4–)4–11 cm × 15–55 mm (narrower in some plants along Vancouver Island and Washington coast), widest ± at midlength (proximal leaves abruptly much smaller, 0.1–0.5 cm × 0.7–1.3 mm, ± scalelike), apex rounded to acute.

in terminal whorl or cluster, dimorphic, with smaller cauline and alternate ones proximally (some ± scalelike);

petiole present (distal) or absent (proximal);

blade lanceolate or oblanceolate to elliptic, suborbiculate, obovate, or spatulate, base cuneate, margins entire, plane, apex acuminate, acute, or obtuse to rounded, surfaces glabrous.

Inflorescences

axillary in distal leaves, solitary flowers.

Pedicels

1–5, 2.9–4.6 cm, shorter than to equaling leaves (sometimes longer in fruit), glabrous or sparsely glandular.

present.

Flowers

corolla pink, rose, or pinkish lavender, 4.5–8.8 mm, lobes ovate to lanceolate, apex acuminate or abruptly acute.

sepals (5–)7(–9), green, calyx lobes lanceolate or lanceolate-linear, much longer than tube;

petals (5–)7(–9), corolla white to pink, rose, or pinkish lavender, rotate, lobes longer than tube, apex acute or acuminate;

stamens (5–)7(–9);

filaments connate basally.

Fruits

capsular, globose, dehiscence valvate.

Seeds

2–15, black or reddish brown, globose, with deciduous, white, netlike covering.

x

= 35, 42.

Trientalis latifolia

Trientalis

Phenology Flowering summer.
Habitat Moist coniferous forests, stream banks, ocean cliffs
Elevation 0-1500 m (0-4900 ft)
Distribution
from FNA
CA; ID; OR; WA; BC; YT
[WildflowerSearch map]
from USDA
n North America; Eurasia
Discussion

In British Columbia, Trientalis latifolia is known from scattered populations along the coast and the American border. Specimens from a disjunct population in central Yukon (E. Hultén 1968; W. J. Cody 1996) were not examined.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Species 3 (3 in the flora).

The number of species recognized in treatments of Trientalis has varied from two to four; in some, only T. europaea and T. borealis have been recognized, sometimes T. latifolia has also been recognized, while other authors have segregated the northern Pacific populations of T. europaea as T. arctica. We consider only three to be solid species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Flowering pedicels usually longer than leaves; proximal leaves gradually smaller than terminal cluster, at least some wider than 1 mm; distal leaves widest beyond midlength.
T. europaea
1. Flowering pedicels usually shorter than leaves; proximal leaves abruptly much smaller than terminal cluster, all 1.5 mm or narrower; distal leaves widest at or below midlength
→ 2
2. Corollas white; leaf blades lanceolate to lanceolate-elliptic, apex acute to acuminate; pedicels 1-3 (rarely more).
T. borealis
2. Corollas pink, rose, or pinkish lavender; leaf blades elliptic to suborbiculate (narrower in some plants along Vancouver Island and Washington coast), apex rounded to acute; pedicels 1-5.
T. latifolia
Source FNA vol. 8, p. 305. FNA vol. 8, p. 303.
Parent taxa Myrsinaceae > Trientalis Myrsinaceae
Sibling taxa
T. borealis, T. europaea
Subordinate taxa
T. borealis, T. europaea, T. latifolia
Synonyms Alsinanthemum europaeum var. latifolium, T. borealis subsp. latifolia, T. europaea var. latifolia
Name authority Hooker: Fl. Bor.-Amer. 2: 121. 1838 , Linnaeus: Sp. Pl. 1: 344. (1753): Gen. Pl. ed. 5, 161. 1754 ,
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