• Juncus acuminatus Michx., Tapertip rush, Native, Boulder Co., Photos Phytoimages, USDA_Plants

• Juncus alpinoarticulatus Chaix, Northern green rush, Native, Boulder Co., Photos Phytoimages, USDA_Plants

• Juncus arcticus Willd. var. balticus (Willd.) Trautv., Arctic rush, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Juncus arcticus Willd. ssp. littoralis (Engelm.) Hultén, Mountain rush, Synonyms: Juncus balticus Willd., Juncus balticus Willd. var. littoralis Engelm., Juncus balticus Willd. var. montanus Engelm., Juncus balticus Willd. var. melanogenus Fernald & Wiegand, Juncus balticus Willd. var. stenocarpus Buchenau & Fernald, Juncus balticus Willd. var. vallicola Rydb., Native, Common, Photos Phytoimages, USDA_Plants

• Juncus articulatus L., jointleaf rush, Native, Boulder Co., Photos Phytoimages, USDA_Plants

• Juncus biglumis L., Two-flowered rush, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Juncus brachycephalus (Engelm.) Buchenau, Smallhead rush, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Juncus bufonius L. var. bufonius, Toad rush, Native, Common, Photos Phytoimages, USDA_Plants

• Juncus castaneus Sm., Chestnut rush, Native, Common, Photos Phytoimages, USDA_Plants

• Juncus compressus Jacq., Roundfruit rush, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Juncus confusus Coville, Colorado rush, Native, Common, Photos Phytoimages, USDA_Plants

• Juncus dichotomus Elliott, forked rush, Synonym: Juncus platyphyllus (Wiegand) Fernald, Introduced, Boulder Co., Photos Phytoimages, USDA_Plants

• Juncus drummondii E. Mey., Drummond's rush, Native, Common, Photos Phytoimages, USDA_Plants

• Juncus dudleyi Wiegand, Dudley's rush, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Juncus effusus L., Common rush, Introduced, Boulder Co., Photos Phytoimages, USDA_Plants

• Juncus ensifolius Wikstr., Swordleaf rush, Synonym: Juncus saximontanus A. Nelson, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Juncus filiformis L., Thread rush, Native, Uncommon, Photos Phytoimages, USDA_Plants

• Juncus gerardii Loisel., Saltmeadow rush, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Juncus hallii Engelm., Hall's rush, Native, Boulder, Grand & Jackson Cos., Photos Phytoimages, USDA_Plants

• Juncus interior Wiegand, Inland rush, Native, Common, Photos Phytoimages, USDA_Plants

• Juncus longistylis Torr., Longstyle rush, long-styled rush, Native, Common, Photos Phytoimages, USDA_Plants

• Juncus marginatus Rostk., Grassleaf rush, Native, Boulder Co., Photos Phytoimages, USDA_Plants

• Juncus mertensianus Bong., Mertens' rush, Native, Common, Photos Phytoimages, USDA_Plants

• Juncus nevadensis S.Watson, Sierra rush, Nevada rush, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Juncus nodosus L., Knotted rush, Jointed rush, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Juncus parryi Engelm., Parry's rush, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Juncus saximontanus A.Nelson, Rocky Mountain rush, Native, Common, Photos Phytoimages, USDA_Plants

• Juncus torreyi Coville, Torrey's rush, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Juncus tracyi A.Nelson, Tracy rush, Tracy's rush, Not listed in Ackerfield (2015). USDA Plants shows it in Boulder, Grand, and Jackson Cos., Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Juncus triglumis L., Threehulled rush, three-hulled rush, Synonym: Juncus albescens (Lange) Hultén, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Juncus triglumis L. var. albescens Lange, Threehulled rush, three-hulled rush, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Juncus tweedyi (Engelm.) Fernald, Tweedy rush, Tweedy's rush, Not listed in Ackerfield (2015). USDA Plants shows it in Larimer Co. only., Native, Rare, Photos Phytoimages, USDA_Plants

• Juncus vaseyi Engelm., Vasey rush, Vasey's rush, Native, Rare, Photos Phytoimages, USDA_Plants

• Luzula comosa E.Mey., Pacific woodrush, Native, Larimer Co., Photos Phytoimages, USDA_Plants

• Luzula parviflora (Ehrh.) Desv., Small-flowered Woodrush, Native, Common, Photos Phytoimages, USDA_Plants

• Luzula spicata (L.) DC., Spiked woodrush, Arctic woodrush, Native, Common, Photos Phytoimages, USDA_Plants

• Luzula subcapitata (Rydb.) H.D.Harr., Colorado woodrush, Spherical spikerush, Native, Uncommon, Photos Phytoimages, USDA_Plants

Juncaginaceae

• Triglochin maritimum, Arrowgrass, Native, Abundance - Unknown, Photos Phytoimages, USDA_Plants

• Triglochin palustre, Swamp Arrowgrass, Native, Common, Photos Phytoimages, USDA_Plants