Thin-petal Larkspur, Two-lobe Larkspur, Upland Larkspur
Delphinium nuttallianum
Synonyms: Delphinium bicolor, Delphinium decorum ssp. tracyi, Delphinium lineapetalum, Delphinium nelsonii, Delphinium nuttallianum var. fulvum, Delphinium nuttallianum var. levicaule, Delphinium nuttallianum var. lineapetalum, Delphinium nuttallianum var. nuttallianum, Delphinium pauciflorum, Delphinium sonnei
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Upland larkspur as seen at left in oak woods at Exit 1 on Interstate 5 in southwestern Oregon.........April 6, 2009. The photo at right shows upland larkspur blooming in open forest along the Pacific Crest Trail #2000 on the western slopes of Observation Peak, Siskiyou Crest, Rogue River-Siskiyou National Forest.......July 15, 2020.
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These 3 photos show close-ups of the flowers and leaf of upland larkspur as seen in oak woods at Exit 1 on Interstate 5 in southwestern Oregon...........April 6, 2009. Click each photo to see an enlarged view of each.
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Upland larkspurs as seen near the parking area at the Rough and Ready Botanical Wayside along US Highway 99 southwest of Cave Junction, Oregon...........April 29, 2012.
Upland larkspur as seen atop Upper Table Rock to the northwest of Medford, Oregon..........April 28, 2012. Note the long pedicel and the hairs on the inner surface of the lower petals..
Basal leaves of upland larkspur as seen on a road cut near the Green Bridge over the Illinois River along the Eight Dollar Mountain Road.........April 5, 2009.
Paul Slichter