Platanthera orbiculata (Pursh) Lindl. 1835

Flower Closeup

Inflorescence Photos by Jim Fowler and his P-Base Orchid North American Orchid Website

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Common Name Round-Leafed Orchid or Heal All Orchid

Flower Size 3/4" [2 cm]

A medium sized, cold to cool growing terrestrial from Canada, Alaska and the northern US growing deep woods, swamps, in acid soil at altitudes around 450 meters, with 2 subopposite, basal, broadly elliptic to suborbicular, fleshy, shiny leaves spread flat on the ground that blooms in the late spring through summer on a terminal, erect, 1 to 2 1/2' [30 to 75 cm] long, many flowered, racemose inflorescence with lanceolate, shorter than the ovary floral bracts and carrying fragrant flowers.

Synonyms Habenaria macrophylla Goldie 1822; Habenaria orbiculata [Pursh.]Torr. 1826; Habenaria orbiculata f. macrophylla (Goldie) F.J.A.Morris & Eames 1929; Habenaria orbiculata var. lehorsii Fernald 1950; Habenaria orbiculata var. longifolia Clute 1904; Habenaria orbiculata var. macrophylla (Goldie) B.Boivin 1967; Habenaria orbiculata var. menziesii (Lindl.) Fernald 1950; Habenaria orbiculata var. trifolia Mousley 1934; Habenaria orbiculata var. trifolia Mousley 1934; Lysias macrophylla (Goldie) House 1906; Lysias orbiculata (Pursh) Rydb. 1900; Lysias orbiculata var. pauciflora Jenn. 1920; *Orchis orbiculata Pursh. 1814; Platanthera macrophylla (Goldie) P.M.Br. 1988; Platanthera menziesii Lindl. 1835; Platanthera orbiculata f. lehorsii (Fernald) P.M.Br. 1995; Platanthera orbiculata f. longifolia (Clute) P.M.Br. 2006; Platanthera orbiculata f. pauciflora (Jenn.) P.M.Br. 2006; Platanthera orbiculata f. trifolia (Mousley) P.M.Br. 1995; Platanthera orbiculata var. lehorsii (Fernald) W.J.Schrenk 1977;

References W3 Tropicos, Kew Monocot list , IPNI ; Studies in the Family Orchidaceae Vol 4 Ames 1910 as Habenaria orbiculata; Studies in the Family Orchidaceae Vol 4 Ames 1910 as Habenaria macrophylla; Native Orchids of North America Correll 1950 as Habenaria orbiculata drawing fide; Encyclopedia of Cultivated Orchids Hawkes 1965; The Native Orchids of the United States and Canada Luer 1975 drawing/photos fide; Schlechteriana Vol 4 No 4 1993 as Platanthera orbiculata

Platanthera orbiculata var. macrophylla (Goldie) Luer 1975 Photo by Carl Luer

Flower Closeup Photo by Al Menk and his Picasa Orchid Photo Website

Notice the much larger leaves, the compact inflorescence and the longer spur which separates this variety from the type.

Synonyms Habenaria macrophylla Goldie 1822; Habenaria orbiculata f. macrophylla (Goldie) F.J.A.Morris & Eames 1929; Habenaria orbiculata var. macrophylla (Goldie) B.Boivin 1967; Lysias macrophylla (Goldie) House 1906; macrophylla (Goldie) P.M.Br. 1988

References W3 Tropicos, Kew Monocot list , IPNI ; The Native Orchids of the United States and Canada Luer 1975 drawing/photos fide;

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