Papaveraceae

• Argemone hispida A.Gray, Rough prickly poppy, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Argemone polyanthemos (Fedde) G.B. Ownbey, Crested prickly poppy, Native, Common, Photos Phytoimages, USDA_Plants

• Chelidonium majus L. var. majus, Celandine, Not listed for Colorado in USDA Plants, Introduced, Boulder Co., Photos Phytoimages, USDA_Plants

• Corydalis aurea Willd., Golden corydalis, Golden Smoke, Native, Common, Photos Phytoimages, USDA_Plants

• Eschscholzia californica Cham., California poppy, Introduced, Larimer Co., Photos Phytoimages, USDA_Plants

• Fumaria vaillantii Loisel., Earthsmoke, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Glaucium corniculatum (L.) J.H. Rudolph, Blackspot hornpoppy, Introduced, Boulder Co., Photos Phytoimages, USDA_Plants

• Papaver orientale L., Oriental poppy, Introduced, Larimer Co., Photos Phytoimages, USDA_Plants

• Papaver radicatum ssp. kluanense (D. Löve) D.F. Murray, Alpine Poppy, Native, Common, Photos Phytoimages, USDA_Plants

Parnassiaceae

• Parnassia fimbriata K.D. Koenig, Grass-of-Parnassus, Native, Common, Photos Phytoimages, USDA_Plants

• Parnassia kotzebuei Cham. ex Spreng., Kotzebue's grass of Parnassus, Kotzebue's grass-of-Parnassus, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Parnassia palustris L. var. montanensis (Fernald & Rydb. ex Rydb.) C.L. Hitchc., mountain grass of Parnassus, Synonym: Parnassia parviflora DC., Native, Uncommon, Photos Phytoimages, USDA_Plants

Phrymaceae

• Mimulus floribundus Douglas ex Lindl., Many-flowered monkeyflower, Manyflowered monkey-flower, Native, Common, Photos Phytoimages, USDA_Plants

• Mimulus gemmiparus W.A. Weber, Rocky Mountain monkey-flower, Weber monkey-flower, Synonym:, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Mimulus glabratus Kunth, Smooth monkey-flower, Roundleaf monkeyflower, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Mimulus guttatus DC., Yellow monkey-flower, Common monkeyflower, Seep monkeyflower, Native, Common, Photos Phytoimages, USDA_Plants

• Mimulus lewisii Pursh, Lewis' monkey-flower, purple monkeyflower, Native, Jackson Co., Photos Phytoimages, USDA_Plants

• Mimulus moschatus Douglas ex Lindl., Musk flower, Muskflower, Native, Jackson Co., Photos Phytoimages, USDA_Plants

• Mimulus rubellus A. Gray, Little redstem monkey-flower, Native, Grand Co., Photos Phytoimages, USDA_Plants

• Mimulus suksdorfii A. Gray, Suksdorf's monkeyflower, Specimens identified as Mimulus breweri (Greene) Coville are actually M. suksdorfii or M. rubellus., Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Mimulus tilingii Regel, Subalpine monkeyflower, Subalpine monkey-flower, Tiling's monkeyflower, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

Plantaginaceae

• Bacopa rotundifolia (Michx.) Wettst., Disk water hyssop, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Besseya alpina (A. Gray) Rydb., Alpine Kittentails, Native, Common, Photos Phytoimages, USDA_Plants

• Besseya plantaginea (James) Rydb., White river coraldrops, White river kittentails, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Besseya wyomingensis (A. Nelson) Rydb., Wyoming kittentails, Wyoming besseya, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Callitriche hermaphroditica L., Northern water-starwort, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Callitriche heterophylla Pursh, Two-headed water-starwort, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Callitriche palustris L., Vernal water-starwort, Synonym: Callitriche verna L., Native, Common, Photos Phytoimages, USDA_Plants

• Chionophila jamesii Benth., Rocky Mountain snowlover, Native, Rare, Photos Phytoimages, USDA_Plants

• Collinsia parviflora Douglas ex Lindl., Maiden blue-eyed Mary, Native, Common, Photos Phytoimages, USDA_Plants

• Digitalis purpurea L., Purple foxglove, Introduced, Boulder Co., Photos Phytoimages, USDA_Plants

• Gratiola neglecta Torr., Clammy hedgehyssop, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Hippuris vulgaris L., Common Mare's tail, Native, Common, Photos Phytoimages, USDA_Plants

• Linaria canadensis (L.) Chaz. var. texana (Scheele) Pennell, Blue toadflax, Synonym: Nuttallanthus texanus (Scheele) D.A. Sutton, Native, Boulder Co., Photos Phytoimages, USDA_Plants

• Linaria vulgaris Mill., Butter-and-eggs, Yellow Toadflax, Introduced, Abundant, Photos Phytoimages, USDA_Plants

• Lindernia dubia (L.) Pennell var. anagallidea (Michx.) Cooperr., Yellowseed false pimpernel, Native, Boulder Co., Photos Phytoimages, USDA_Plants

• Penstemon angustifolius Nutt. ex Pursh, Broadbeard beardtongue, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Penstemon caespitosus Nutt. ex A. Gray, Mat penstemon, Native, Jackson & Grand Cos., Photos Phytoimages, USDA_Plants

• Penstemon crandallii A. Nelson, Crandall's beardtongue, Native, Grand Co., Photos Phytoimages, USDA_Plants

• Penstemon cyathophorus Rydb., Sagebrush beardtongue, Native, Jackson & Grand Cos., Photos Phytoimages, USDA_Plants

• Penstemon eriantherus Pursh, Fuzzytongue penstemon, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Penstemon glaber Pursh, Mountain Beardtongue, Native, Common, Photos Phytoimages, USDA_Plants

• Penstemon gracilis Nutt., Lilac penstemon, Native, Boulder Co., Photos Phytoimages, USDA_Plants

• Penstemon hallii A. Gray, Hall's beardtongue, Not listed in Ackerfield (2015) for Larimer county, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Penstemon harbourii A. Gray, Harbour's beardtongue, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Penstemon harringtonii Penland, Harrington beardtongue, Harrington's beardtongue, Native, Grand Co., Photos Phytoimages, USDA_Plants

• Penstemon laricifolius Hook. & Arn. var. exilifolius (A. Nelson) Payson, Larchleaf beardtongue, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Penstemon osterhoutii Pennell, Osterhout's beardtongue, Native, Grand Co., Photos Phytoimages, USDA_Plants

• Penstemon palmeri A. Gray, Palmer's penstemon, Native, Boulder Co., Photos Phytoimages, USDA_Plants

• Penstemon penlandii W.A. Weber, Penland's beardtongue, Native, Grand Co., Photos Phytoimages, USDA_Plants

• Penstemon procerus Douglas ex Graham, Pincushion beardtongue, Clustered penstemon, Native, Common, Photos Phytoimages, USDA_Plants

• Penstemon radicosus A. Nelson, Matroot penstemon, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Penstemon rydbergii A. Nelson, Rydberg's penstemon, Large clustered penstemon, Native, Common, Photos Phytoimages, USDA_Plants

• Penstemon saxosorum Pennell, Upland beardtongue, Native, Jackson Co., Photos Phytoimages, USDA_Plants

• Penstemon secundiflorus Benth., Sidebells Penstemon, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Penstemon strictus Benth., Rocky Mountain penstemon, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Penstemon virens Pennell ex Rydb., Front Range beardtongue, Native, Common, Photos Phytoimages, USDA_Plants

• Penstemon virgatus A. Gray var. asa-grayi (Crosswh.) Dorn, Oneside penstemon, Synonym: Penstemon unilateralis Rydb., Native, Common, Photos Phytoimages, USDA_Plants

• Penstemon watsonii A. Gray, Watson's penstemon, Native, Grand Co., Photos Phytoimages, USDA_Plants

• Penstemon whippleanus A. Gray, Whipple's penstemon, Dark penstemon, Native, Common, Photos Phytoimages, USDA_Plants

• Plantago elongata Pursh, Prairie plantain, Native, Boulder & Weld Cos., Photos Phytoimages, USDA_Plants

• Plantago eriopoda Torr., Redwool Plantain, Native, Common, Photos Phytoimages, USDA_Plants

• Plantago lanceolata L., Narrowleaf plantain, Introduced, Larimer Co., Photos Phytoimages, USDA_Plants

• Plantago major L., Common Plantain, Introduced, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Plantago patagonica Jacq., Woolly plantain, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Plantago tweedyi A. Gray, Tweedy Plantian, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Veronica americana Schwein. ex Benth., American Speedwell, Native, Common, Photos Phytoimages, USDA_Plants

• Veronica anagallis-aquatica L., water speedwell, Synonyms: Veronica catenata Pennell, Veronica salina Schur, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Veronica biloba L., Bilobed speedwell, Two-lobe speedwell, Synonym: Pocilla biloba (L.) W.A. Weber, Introduced, Boulder Co., Photos Phytoimages, USDA_Plants

• Veronica peregrina L. var. xalapensis (Kunth) Pennell, Purslane speedwell, Hairy purslane speedwell, Annual Veronica, Native, Common, Photos Phytoimages, USDA_Plants

• Veronica persica Poir., Persian speedwell, Birdeye speedwell, Synonym: Pocilla persica (Poir.) Fourr., Introduced, Larimer Co., Photos Phytoimages, USDA_Plants

• Veronica polita Fr., Gray field speedwell, Synonym: Pocilla polita (Fr.) Fourr., Introduced, Larimer Co., Photos Phytoimages, USDA_Plants

• Veronica scutellata L., Skullcap speedwell, Grassleaf speedwell, Grass-leaf speedwell, Marsh speedwell, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Veronica serpyllifolia ssp. humifusa (Dicks.) Syme, Thyme-leaf speedwell, Brightblue speedwell, Synonym: Veronicastrum serpyllifolium (L.) Fourr. ssp. humifusum (Dicks.) W.A. Weber, Native, Common, Photos Phytoimages, USDA_Plants

• Veronica wormskjoldii Roem. & Schult., American alpine speedwell, Synonym: Veronica nutans Bong., Native, Common, Photos Phytoimages, USDA_Plants