Neottia convallarioides (Sw.) Rich.1817 Photo by Carl Luer

Plant in situ Lake Superior

Plant Photos by Joshua Horky Botanist, Lake Superior Research Institute - UW Superior


Common Name The Broad-Leafed Twayblade

Flower Size .4" [1 cm]

Found from British Colombia to Newfoundland, south to northern California, Utah and Colorado, Minnesota, Wisconson, Maine and Nova Scotia in damp, mossy coniferous and mixed forests, bogs, swamps, wet thickets and peaty barrens as a miniature to just medium sized, cold growing terrestrial orchid with a pubescent stem carrying two, opposite, above the middle of the stem, broadly ovate leaves that blooms in the spring and summer on an erect, laxly, 2 to 14" [5 to 35 cm] long, to 20 flowered inflorescence with short, lanceolate floral bracts

Synonyms *Epipactis convallarioides Sw. 1800; Listera convallarioides (Sw.) Nutt. 1818; Listera convallarioides (Sw.) Elliott 1823; Neottia eschscholziana (Cham. & Schltdl.) Steud. 1841; Ophrys convallarioides (Sw.) W. Wight ex House 1905

References W3 Tropicos, Kew Monocot list , IPNI ; The Native Orchids of the United States and Canada Luer 1975 as Listera convallarioidesdrawing/photos fide; Field Guide to the Orchids of North America Williams & Williams 1983; Orchid Digest Vol 63 #2 1999 as Listera convallarioides photo fide; Schlechteriana Vol 4 No 4 1993; AOS Bulletin Vol 63 No 4 1994 as Listera convallariodes; Orchid Digest Vol 74 #2 2010 photo fide; AOS Bulletin Vol 86 #2 2017 photo good;