Orchidaceae

• Calypso bulbosa (L.) Oakes var. americana (R. Br.) Luer, Fairy slipper, Native, Rare, Photos Phytoimages, USDA_Plants

• Coeloglossum viride (L.) Hartm., Long-bract frog orchid, Synonyms: Coeloglossum viride ssp. bracteatum (L.) R.M. Bateman, A.M. Pridgeon & M.W. Chase, Coeloglossum viride var. virescens (Muhl. ex Willd.) O.Gruss & M.Wolff, Dactylorhiza viridis (L.) R.M. Bateman, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Corallorrhiza maculata (Raf.) Raf., Spotted coralroot, Spotted coral-root, Native, Common, Photos Phytoimages, USDA_Plants

• Corallorhiza striata Lindl., Striped coralroot, Striped coral-root, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Corallorhiza trifida Chatelain, Yellow coralroot, Green coralroot, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Corallorhiza wisteriana Conrad, Spring Coral-root, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Cypripedium fasciculatum Kellogg ex S. Watson, Purple lady's slipper, Brownie lady's slipper, Native, Common, Photos Phytoimages, USDA_Plants

• Cypripedium parviflorum var. pubescens (Willd.) O.W.Knight, Yellow lady's slipper, Native, Rare, Photos Phytoimages, USDA_Plants

• Epipactis helleborine (L.) Crantz, Broadleaf helleborine, Native, Boulder Co., Photos Phytoimages, USDA_Plants

• Goodyera oblongifolia Raf., Western rattlesnake plantain, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Listera borealis (Morong) Szlach., Northern twayblade, Northern listera, Native, Rare, Photos Phytoimages, USDA_Plants

• Listera convallarioides (Sw.) Rich., Broad-leaved twayblade, Native, Rare, Photos Phytoimages, USDA_Plants

• Listera cordata ssp. nephrophylla (Rydb.) Hultén, Heartleaf twayblade, Heart-leaved twayblade, Native, Common, Photos Phytoimages, USDA_Plants

• Malaxis monophyllos (L.) Sw. var. brachypoda (A. Gray) F. Morris & Eames, White adder's mouth, Native, Boulder Co., Photos Phytoimages, USDA_Plants

• Piperia unalascensis (Spreng.) Rydb., Slender-spire orchid, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Platanthera aquilonis Sheviak, Northern green orchid, The correct name for the orchid called P. hyperborea (L.) Lindl. in Colorado, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Platanthera dilatata var. albiflora (Cham.) Ledeb., Scentbottle, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Platanthera dilatata var. dilatata (Pursh) Lindl. ex L.C.Beck, White bog-orchid, Synonym: Habenaria dilatata (Pursh) Hook., Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Platanthera huronensis Lindl., Huron green orchid, Synonym: Platanthera hyperborea (L.) Lindl. var. huronensis (Nutt.) Luer, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Platanthera obtusata (Banks ex Pursh) Lindl., One-leaved bog-orchid, Synonym: Habenaria obtusata (Banks ex Pursh) Richardson, Lysiella obtusata (Banks ex Pursh) Rydb., Native, Uncommon, Photos Phytoimages, USDA_Plants

• Platanthera purpurascens (Rydb.) Sheviak & Jennings, Purple-petal bog orchid, Modoc bog orchid, Slender bog orchid, The correct name for the orchid called P. stricta Lindl. or P. saccata (Greene) Hultén, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Platanthera tescamnis Sheviak & W.F. Jennings, Stream bog orchid, Iintermountain bog orchid, The correct name for the orchid called P. sparsiflora (S. Watson) Schltr. in Colorado, Native, Jackson Co., Photos Phytoimages, USDA_Plants

• Spiranthes diluvialis Sheviak, Ute lady's tresses, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Spiranthes romanzoffiana Cham., Hooded lady's tresses, Native, Common, Photos Phytoimages, USDA_Plants