Pyrola asarifolia |
Pyrola asarifolia subsp. asarifolia |
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bog wintergreen, common pink wintergreen, large wintergreen, liver-leaf wintergreen, pink pyrola, pink shinleaf, pink wintergreen, pyrole à feuilles d'asaret |
bog wintergreen, common pink wintergreen, liver-leaf wintergreen, pink pyrola, pink wintergreen |
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Habit | Plants rhizomatous, (0.8–)1.5–4.3(–6.4) dm. | |||||
Leaves | petiole (6–)15–65(–109) mm, channeled adaxially, glabrous; blade not maculate, dull and light green to purplish abaxially, shiny and dark green adaxially, ovate, elliptic, round, or reniform, (10–)24–71(–98) × (10–)13–49(–83) mm, coriaceous, base cordate or rounded to decurrent, margins entire or crenulate or denticulate, apex obtuse to acute. |
blades round, ovate, elliptic, or reniform, margins entire or crenulate. |
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Inflorescences | 1 per stem, 4–29-flowered; peduncular bracts 1–3(–5), ovate to oblong-ovate, 7–16 × 2.5–5 mm, chartaceous or membranous, margins entire; inflorescence bracts ovate to oblong-ovate, usually as long as or longer than, sometimes shorter than subtended pedicels, 3–17 × 1–3.6 mm, chartaceous. |
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Pedicels | (3–)4–11 mm. |
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Flowers | calyx lobes appressed or spreading in fruit, green or pinkish with margins hyaline to white or pinkish, triangular to triangular-ovate, 1.4–5.5(–5.8) × 1.3–2.7 mm, margins entire or erose-denticulate, apices acute to acuminate; petals white, white proximally and pinkish distally, or pink to purplish red throughout, obovate to round, 4.8–9.1 × 2.9–6 mm, margins entire; stamens 4.5–7.5 mm; filament base 0.6–1.1 mm wide; anthers (1.7–)2–3.5(–3.9) mm, apiculations 0.1–0.5(–0.7) mm, thecae creamy white or tan to dark pink, tubules pink to dark pink, 0.1–0.4 mm, gradually narrowed from thecae, lateral walls touching for most of their lengths, pores 0.1–0.2 × 0.05–0.1 mm; ovary smooth; style exserted, 7–10 mm; stigma 0.7–1.6 mm wide, lobes erect, (without subtending ring of hairs). |
calyx lobes 1.4–3.5(–4.3) mm, apices acute to acuminate; anthers (1.7–)2–3.4 mm. |
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Capsules | depressed-globose, 4–5 × 6–8 mm. |
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Proximal | inflorescence bracts usually as long as or longer than subtended pedicels, sometimes shorter than subtended pedicels. |
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2n | = 46. |
= 46. |
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Pyrola asarifolia |
Pyrola asarifolia subsp. asarifolia |
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Phenology | Flowering Apr–Jun. | |||||
Habitat | Dry to moist forests, bogs | |||||
Elevation | 0-3200 m (0-10500 ft) | |||||
Distribution |
AK; CA; CO; IA; ID; IN; MA; ME; MI; MN; MT; ND; NH; NM; NV; NY; OR; PA; SD; UT; VT; WA; WI; WY; AB; BC; MB; NB; NS; NT; NU; ON; PE; QC; SK; YT; Asia
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AK; CA; CO; IA; ID; IN; MA; ME; MI; MN; MT; ND; NH; NM; NV; NY; OR; PA; SD; UT; VT; WA; WI; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; PE; QC; SK; YT; e Asia |
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Discussion | Subspecies 3 (2 in the flora). Regional variation in Pyrola asarifolia in North America was examined by E. Haber (1983) using morphological and flavonoid data. Despite finding some longitudinal geographic differentiation, he concluded that most earlier-recognized segregates of the P. asarifolia complex were best included within a single, polymorphic species, with the large-bracted, denticulate-leaved, Pacific Northwest and northern Rocky Mountains element (subsp. bracteata) distinguishable from the relatively short-bracted, crenate-leaved, transcontinental element (subsp. asarifolia). Included within his concept of the latter subspecies were Asian plants referred to P. incarnata (de Candolle) Freyn. A more comprehensive study of the Asian element (Haber and Hiroshi Takahashi 1988) led to the conclusion that this vicariad was sufficiently distinct to warrant recognition as P. asarifolia subsp. incarnata (de Candolle) Haber & Hir. Takahashi; it is distinguished from the North American subspecies by its narrower sepals. Takahashi (1993) found differences also in the seeds of the two subspecies. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 8, p. 380. | FNA vol. 8, p. 381. | ||||
Parent taxa | Ericaceae > subfam. Monotropoideae > Pyrola | Ericaceae > subfam. Monotropoideae > Pyrola > Pyrola asarifolia | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. asarifolia var. purpurea, P. californica, P. uliginosa | |||||
Name authority | Michaux: Fl. Bor.-Amer. 1: 251. (1803) | unknown | ||||
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