Lamiaceae

• Agastache foeniculum (Pursh) Kuntze, Blue giant hyssop, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Agastache urticifolia (Benth.) Kuntze, nettleleaf giant hyssop, Native, Jackson Co., Photos Phytoimages, USDA_Plants

• Dracocephalum parviflorum Nutt., American dragonhead, Synonym: Moldavica parviflora (Nutt.) Britton, Native, Common, Photos Phytoimages, USDA_Plants

• Glechoma hederacea L., ground ivy, Introduced, Larimer Co., Photos Phytoimages, USDA_Plants

• Hedeoma drummondii Benth., Drummond's false pennyroyal, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Hedeoma hispida Pursh, Rough false pennyroyal, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Lamium amplexicaule L., Henbit, Deadnettle, Introduced, Larimer Co., Photos Phytoimages, USDA_Plants

• Lamium purpureum L., purple deadnettle, Introduced, Boulder Co., Photos Phytoimages, USDA_Plants

• Leonurus cardiaca L., Motherwort, Common motherwort, Introduced, Larimer Co., Photos Phytoimages, USDA_Plants

• Lycopus americanus Muhl. ex W.P.C. Barton, American water horehound, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Lycopus asper Greene, Rough bugleweed, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Lycopus uniflorus Michx., Northern bugleweed, Native, Boulder & Weld Cos., Photos Phytoimages, USDA_Plants

• Marrubium vulgare L., Horehound, Common horehound, Introduced, Uncommon, Photos Phytoimages, USDA_Plants

• Mentha arvensis L., Wild Mint, Native, Common, Photos Phytoimages, USDA_Plants

• Mentha X piperita L., Peppermint, Mentha aquatica X M. spicata, Introduced, Possibly in RMNP, Photos Phytoimages, USDA_Plants

• Mentha spicata L., Spearmint, Introduced, Larimer Co., Photos Phytoimages, USDA_Plants

• Monarda fistulosa L. ssp. fistulosa var. menthifolia (Graham) Fernald, Wild bergamot, Mintleaf bergamot, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Monarda pectinata Nutt., Plains beebalm, Pony beebalm, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Nepeta cataria L., Catnip, Catmint, Catwort, Field balm, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Prunella vulgaris L., Heal-all, Native, Common, Photos Phytoimages, USDA_Plants

• Salvia aethiopis L., Mediterranean sage, Introduced, Boulder Co., Photos Phytoimages, USDA_Plants

• Salvia azurea Michx. ex Lam. var. grandiflora Benth., Blue sage, Pitcher sage, Introduced, Boulder Co., Photos Phytoimages, USDA_Plants

• Salvia pratensis L., Meadow clary, Introduced sage, Introduced, Boulder Co., Photos Phytoimages, USDA_Plants

• Salvia reflexa Hornem., Lanceleaf sage, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Salvia sclarea L., Clary sage, European sage, Introduced, Boulder Co., Photos Phytoimages, USDA_Plants

• Salvia X sylvestris L., woodland sage, Salvia nemorosa X S. pratensis, Introduced, Larimer Co., Photos Phytoimages, USDA_Plants

• Scutellaria brittonii Porter, Britton's skullcap, Native, Common, Photos Phytoimages, USDA_Plants

• Scutellaria galericulata L., Marsh skullcap, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Stachys palustris L. var. pilosa (Nutt.) Fernald, Hairy hedge-nettle, Marsh betony, Synonym: Stachys pilosa var. pilosa Nutt., Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Teucrium canadense L. var. occidentale (A. Gray) E.M. McClint. & Epling, Western germander, Native, Larimer Co., Photos Phytoimages, USDA_Plants

Lentibulariaceae

• Utricularia minor L., Lesser bladderwort, Native, Boulder, Grand & Jackson Cos., Photos Phytoimages, USDA_Plants

• Utricularia ochroleuca R.W. Hartm., Yellowish-white bladderwort, Native, Boulder & Jackson Cos., Photos Phytoimages, USDA_Plants

• Utricularia vulgaris L., Common bladderpod, Common bladderwort, Greater bladderwort, Utricularia macrorhiza (Leconte) R.T.Clausen, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

Liliaceae

• Calochortus gunnisonii S.Watson, Gunnison's mariposa lily, Sego Lily, Native, Common, Photos Phytoimages, USDA_Plants

• Calochortus nuttallii Torr. & A. Gray, Nuttall's sego lily, Synonym: Calochortus ciscoensis S. L. Welsh & N. D. Atwood, Native, Grand Co., Photos Phytoimages, USDA_Plants

• Erythronium grandiflorum Pursh, Avalanche Lily, Native, Common, Photos Phytoimages, USDA_Plants

• Fritillaria atropurpurea Nutt., Spotted fritillary, Native, Grand Co., Photos Phytoimages, USDA_Plants

• Lilium philadelphicum L., Wood Lily, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Lloydia serotina (L.) Ker Gawl., Alpine Lily, Native, Common, Photos Phytoimages, USDA_Plants

• Prosartes trachycarpa S.Watson, Roughfruit fairybells, Rough-fruit fairybells, Wartberry fairybells, Synonym: Disporum trachycarpum S.Watson. Sometimes classified in Colchicaceae, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Streptopus amplexifolius (L.) DC., Twisted-stalk, Claspleaf twisted-stalk, Including Streptopus amplexifolius var. chalazatus (L.) DC., Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

Linaceae

• Linum compactum A. Nelson, Compact flax, Wyoming flax, Synonym: Cathartolinum compactum (A. Nelson) Small, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Linum lewisii Pursh, Lewis' flax, Blue flax, Synonym: Adenolinum lewisii (Pursh) Á. Löve & D. Löve, Native, Common, Photos Phytoimages, USDA_Plants

• Linum perenne L., Perenial flax, Introduced, Larimer Co., Photos Phytoimages, USDA_Plants

• Linum rigidum Pursh, Stiffstem flax, Synonym: Mesynium rigidum (Pursh) Á. Löve & D. Löve, Native, Larimer Co., Photos Phytoimages, USDA_Plants

Loasaceae

• Mentzelia albicaulis (Hook.) Torr. & A. Gray, White-stem blazingstar, Ackerfield (2015) has the binomial as: Mentzelia albicaulis (Douglas ex Hook.) Douglas ex Torr. & A. Gray, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Mentzelia decapetala (Pursh ex Sims) Urb. & Gilg ex Gilg, Ten-petal blazingstar, Synonym: Nuttallia decapetala (Pursh ex Sims) Greene, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Mentzelia dispersa S. Watson, Nevada blazingstar, Bushy blazingstar, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Mentzelia multicaulis (Osterh.) A. Nelson ex J. Darl., Manystem blazingstar, Synonym: Nuttallia multicaulis Osterh., Native, Grand Co., Photos Phytoimages, USDA_Plants

• Mentzelia multiflora (Nutt.) A. Gray, Adonis blazingstar, Synonym: Nuttallia multiflora (Nutt.) Greene, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Mentzelia nuda (Pursh) Torr. & A. Gray, Bractless blazingstar, White-flowered blazingstar, Synonym: Nuttallia nuda (Pursh) Greene, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Mentzelia oligosperma Nutt. ex Sims, Chickenthief, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Mentzelia rusbyi Wooton, Rusby's blazingstar, Synonym: Nuttallia rusbyi (Wooton) Rydb., Native, Jackson & Grand Cos., Photos Phytoimages, USDA_Plants

• Mentzelia speciosa Osterh., Jeweled blazingstar, Synonym: Mentzelia sinuata (Rydb.) R.J. Hill, Nuttallia sinuata (Rydb.) Daniels, Nuttallia speciosa (Osterh.) Greene, Native, Common, Photos Phytoimages, USDA_Plants

Lythraceae

• Ammannia robusta Heer & Regel, Grand redstem, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Lythrum alatum Pursh, Winged lythrum, Native, Boulder Co., Photos Phytoimages, USDA_Plants

• Lythrum salicaria L., Purple loosestrife, Introduced, Larimer Co., Photos Phytoimages, USDA_Plants

• Rotala ramosior (L.) Koehne, Lowland rotala, Native, Boulder Co., Photos Phytoimages, USDA_Plants