Skip Navigation
Sign In
  • Home
  • Search
    • Search Collections
    • Map Search
  • Chicago Botanic Garden
    • Project Information
    • Checklists
    • Create a Checklist
    • Dynamic Key
  • Denver Botanic Gardens
    • Project Information
    • Checklists
    • Create a Checklist
    • Dynamic Key
  • Desert Botanical Garden
    • Project Information
    • Checklists
    • Create a Checklist
    • Dynamic Key
  • NY Botanical Garden
    • Project Information
    • Checklists
    • Create a Checklist
    • Dynamic Key
  • Marie Selby Botanical Gardens
    • Project Information
    • Checklists
    • Create a Checklist
    • Dynamic Key
  • Sitemap

Pyrola americana

Pyrola americana Sweet  
Family: Ericaceae
American Wintergreen, more...round-leaved shineleaf, round-leaved wintergreen
Pyrola americana image
  • FNA
  • Indiana Flora
  • Resources
Craig C. Freeman in Flora of North America (vol. 8)
Plants rhizomatous, 0.1-0.3(-0.4) dm. Leaves: petiole (8-)15-70 mm, channeled adaxially, glabrous; blade not or, sometimes, maculate, dull to shiny and light green to green abaxially, shiny and dark green sometimes with white tissue bordering larger veins adaxially, ovate to obovate or round, 16-73(-80) × 16-70 mm, coriaceous, base rounded to decurrent, margins crenate, apex subacute to obtuse, rounded, or retuse. Inflorescences 1 per stem, 4-22-flowered; peduncular bracts 1-5, oblong-ovate, 5.5-13 × 2-4 mm, chartaceous or membranous, margins entire; inflo-rescence bracts lanceolate-ovate, longer than subtended pedicels, 4-12 × 1.2-3 mm, chartaceous. Pedicels 4-8 mm. Flowers: calyx lobes appressed or spreading in fruit, green or pinkish with margins hyaline to white or pinkish, ovate, ovate-oblong, or obovate, 2-4.3(-4.5) × 1.4-2 mm, margins entire or erose-denticulate, apices obtuse to acute; petals white, often suffused with pink, obovate to round, 6-10.5 × 4.5-5 mm, margins entire; stamens 4-7 mm; filament base 0.6-0.9 mm wide; anthers 2-4.1 mm, apiculations 0.1-0.3 mm, thecae creamy white or greenish white to pink or reddish, tubules yellowish brown to pink or reddish, 0.2-0.3 mm, gradually or abruptly narrowed from thecae, lateral walls touching for most of their lengths, pores 0.1-0.2 × 0.1-0.2 mm; ovary smooth; style exserted, 6-9 mm; stigma 0.7-1.6 mm wide, lobes erect. Capsules depressed-globose, 3-3.5 × 4.2-5 mm. 2n = 46.

Flowering Apr-Jun. Moist to dry, deciduous or coniferous forests, bogs; 10-2100 m; St. Pierre and Miquelon; Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que.; Conn., Del., Ill., Ind., Ky., Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Pa., R.I., S.Dak., Tenn., Vt., Va., W.Va., Wis.

The relationship between Pyrola americana and other members of sect. Pyrola awaits resolution; various interpretations exist. Some authors follow M. L. Fernald (1920) in treating it as conspecific with the Eurasian P. rotundifolia. B. Krísa (1966, 1971) considered P. americana to be morphologically distinct from P. rotundifolia, treating it as P. asarifolia subsp. americana (Sweet) Krísa. E. Haber (1972) likewise treated P. americana as a subspecies of P. asarifolia, noting similarities in stamen morphology, flavonoid chemistry, and geography. Later, in a detailed study of P. asarifolia, Haber (1983) did not address directly the position of P. americana, which he did not include as either an infraspecific taxon or synonym of P. asarifolia. The taxon is maintained here as a distinct species pending further studies.

M. L. Fernald (1920) referred plants from Newfoundland and the Gulf of St. Lawrence area, which grow on barrens and in spruce forests, often on calcareous substrates, to Pyrola rotundifolia, consid-ering them indistinguishable from European plants. E. Haber (1972) interpreted them as ecotypic variants of P. asarifolia subsp. asarifolia, noting the occurrence of similar populations outside that area.

From Flora of Indiana (1940) by Charles C. Deam
A rare plant of a few of our northern counties. In shady places in moist, sandy soil, usually at the bases of wooded dunes or wooded slopes.

……

Indiana Coefficient of Conservatism: C = 8

Wetland Indicator Status: FACU

Pyrola americana
Open Interactive Map
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Pyrola americana image
Click to Display
100 Initial Media
- - - - -
View All Media
Institute for Museum and Library Services KU BI Logo Logo for the Biodiversity Knowledge Integration Center

This project was made possible in part by the Institute of Museum and Library Services [MG-70-19-0057-19].

EcoFlora is part of the SEINet Portal Network. Learn more here.

Powered by Symbiota.