The Native Orchids of the United States and Canada Luer 1975 drawing/photos fide; IOSPE PHOTOS

Orchis rotundifolia Banks ex Pursh 1814

Photo by Carl Austen

Plant in situ Michigan

Photo by Carl Luer

Part sun Cold Summer

Common Name The Round Leafed Orchis

Flower Size 3/4" [2 cm]

Found as a cold growing terrestrial in western Canada and northeastern USA at elevations of sealevel to 1200 meters with a solitary, ovate to sub-orbicular, basal, fleshy, dull green, indistinctly petiolate base leaf that blooms in the summer on an erect, fluted, naked, to 14" [35 cm] long, to 15 flowered, racemose inflorescence with lanceolate, as long as the ovary floral bracts and carrying simultaneoulsy opening flowers.

Synonyms Amerorchis rotundifolia (Banks ex Pursh) Hultén 1968; Amerorchis rotundifolia f. beckettii (Boivin) Hultén 1968; Amerorchis rotundifolia var. lineata (Mousley) W.J.Schrenk 1997; Habenaria rotundifolia (Banks ex Pursh) Richardson 1823; Habenaria rotundifolia (Banks ex Pursh) Lindl. 1835; Orchis grandiflora B.Heyne in N.Wallich 1832; Orchis rotundifolia f. angustifolia J.Rousseau 1957; Orchis rotundifolia f. beckettii Boivin 1960; Orchis rotundifolia f. lineata (Mousley) E.G.Voss 1966; Orchis rotundifolia var. lineata Mousley 1941; Platanthera rotundifolia (Banks ex Pursh) Lindl. 1835; Ponerorchis rotundifolia (Banks ex Pursh) Soó 1966

References W3 Tropicos, Kew Monocot list , IPNI ; AOS Bulletin Vol 33 No 5 1964 photo; Encyclopedia of Cultivated Orchids Hawkes 1965; Die Orchideen 3 Auflage Bd 1 Sonderabdruck aus Schlechter Lieferung 4 193 to 256 Brieger, Maatsch and Senghas 1973 as Amerorchis rotundifolia; The Native Orchids of the United States and Canada Luer 1975 as Amerorchis rotundifolia drawing/photos fide; AOS Bulletin Vol 60 No 6/537 1991 as Ameriorchis rotundifolia photo; Schlechteriana Vol 4 No 4 1993 as Ameriorchis rotundifolia f beckettiae; AOS Bulletin Vol 66 No 3 1997 photo; Genera Orchidacearum Vol 2 Part One Pridgeon, Cribb, Chase and Rasmussen 2001 as Ameriorchis rotundifolia photo/drawing ok; AOS Bulletin Vol 72 No 9 2003 photo as Americorchis rotundifolia; AOS Bulletin Vol 78 No 1 2009 photo as Amerorchis rotundifolia; AOS Bulletin vol 78 No 5 2009 as Platanthera rotundifolia