Gustavo A. Romero-González, Germán Carnevali Fernández-Concha, Robert L. Dressler, Lawrence K. Magrath & George W. Argus in Flora of North America (vol. 26)
Credit: Harvard University Herbaria
Sep and lateral pet similar; lip strongly saccate in the basal half, the terminal lobe broadly ovate, not hinged to the basal part, crested at its base with 2 evident swellings; column very short and broad, the large sessile anther hinged to its back below the middle and somewhat projecting; pollinia 4; rhizomatous or stoloniferous plants with numerous alternate lvs and a terminal raceme. 25, N. Hemis.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Citation: The vPlants Project. vPlants: A Virtual Herbarium of the Chicago Region. http://www.vplants.org
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