[The Geranium Family East of the Cascade Mountains of Oregon and Washington]

Rydberg's Geranium, Sticky Purple Geranium

Geranium viscosissimum var. incisum

Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum

Flowers of Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum)

A close-up of the flowers of Rydberg's geranium as seen at the trailhead for Canyon Creek, Klickitat Wildlife Area..........May 22, 2015.

Mid-stem hairs of Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum) - Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum)

Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum) - Upper stem, flowers and flower buds of Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum) - Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum)

Bumble bee on a flower of Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum) - Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum)

A close-up of the flowers of Rydberg's geranium as seen at the trailhead for Canyon Creek, Klickitat Wildlife Area..........May 22, 2015. Plants at this location have a few glands in the hairs, but plants are largely not sticky to the touch.

Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum) - Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum) - Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum)

Rydberg's geranium as seen along a road in aspen woodlands about one quarter mile uphill to the west of Hot Springs Campground, Hart Mt. National Antelope Refuge.........June 9, 2016.

Flower of Sticky Geranium, Sticky Purple Geranium: Geranium viscosissimum var. viscosissimum (Synonym: Geranium attenuilobum) -- Sticky Geranium, Sticky Purple Geranium: Geranium viscosissimum var. viscosissimum (Synonym: Geranium attenuilobum) -- Underside of the flower of Sticky Geranium, Sticky Purple Geranium: Geranium viscosissimum var. viscosissimum (Synonym: Geranium attenuilobum)

Close-ups of what appear to be a white-flowered form of sticky geranium. Generally, a perennial geranium with white flowers would be considered to be Richardson's geranium which is white-flowered with spreading hairs up to half the length of the inner petal surface, but these flowers have such hairs over the lower one-quarter to one-third of the inner surface. Plus most of the other geraniums in this population had dark pink flowers. Photographed at the trailhead to Canyon Creek in the Klickitat State Wildlife Area in south-central Washington.........June 12, 2009.

Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum) - Flower of Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum) - Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum)

Rydberg's geranium as seen beginning to bloom in open forest western edge of FS Road #4215 in Antler Prairie, Ochoco National Forest...........May 27, 2016. These individuals have pale flowers somewhat reminiscent of Geranium richardsonii, but the base of the petals are hair up to about 1/3 of the distance up from the base.

Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum) - Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum)

Rydberg's geranium blooming at left along the Round Mountain South Trail #805 near Wildhorse Springs on the south side of Round Mt., Ochoco National Forest.........May 28, 2016. The photo at right shows Rydberg's geranium blooming near the trailhead for the Stein's Pillar Trail #837, Ochoco National Forest.......June 2, 2018.

Flower of Sticky Geranium, Sticky Purple Geranium: Geranium viscosissimum var. viscosissimum (Synonym: Geranium attenuilobum) -- Underside of the flower of Sticky Geranium, Sticky Purple Geranium: Geranium viscosissimum var. viscosissimum (Synonym: Geranium attenuilobum) -- Sticky Geranium, Sticky Purple Geranium: Geranium viscosissimum var. viscosissimum (Synonym: Geranium attenuilobum)

Sticky Geranium, Sticky Purple Geranium: Geranium viscosissimum var. viscosissimum (Synonym: Geranium attenuilobum) -- Leaves of Sticky Geranium, Sticky Purple Geranium: Geranium viscosissimum var. viscosissimum (Synonym: Geranium attenuilobum)

Close-ups of sticky geranium as seen at the trailhead to Canyon Creek in the Klickitat State Wildlife Area in south-central Washington..........June 12, 2009. This is the same location as the white-flowered form above.

Rydberg's Geranium, Sticky Purple Geranium: Geranium viscosissimum var. incisum (Synonyms: Geranium canum, Geranium nervosum, Geranium strigosius, Geranium strigosum, Geranium viscosissimum ssp. nervosum, Geranium viscosissimum var. nervosum)

Sticky geranium observed in bloom along the South Prong Trail #821, Black Canyon Wilderness......June 16, 2019.

Paul Slichter