[Meadowrues: The Genus Thalictrum East of the Cascade Mountains of Oregon and Washington]

Early Meadowrue, Veiny Meadowrue, Veiny Meadow-rue

Thalictrum venulosum

Synonyms: Thalictrum confine, Thalictrum confine var. columbianum, Thalictrum confine var. greeneanum, Thalictrum occidentale var. columbianum, Thalictrum turneri, Thalictrum venulosum var. confine, Thalictrum venulosum var. fissum, Thalictrum venulosum var. lunellii, Thalictrum venulosum var. turneri

Early Meadowrue, Veiny Meadowrue, Veiny Meadow-rue: Thalictrum venulosum (Synonyms: Thalictrum confine, Thalictrum confine var. columbianum, Thalictrum confine var. greeneanum, Thalictrum occidentale var. columbianum, Thalictrum turneri, Thalictrum venulosum var. confine, Thalictrum venulosum var. fissum, Thalictrum venulosum var. lunellii, Thalictrum venulosum var. turneri)

What might be a close-up of the inflorescence of a female plant of veiny meadowrue as seen in a large boulder field about 200 meters south of Wildhorse Lake, Steens Mountain...........July 10, 2014. Note the erect achenes. Some achenes are somewhat flattened while others are pear-shaped in cross-section. If this isn't T. venulosum, then it would be T. fendleri which has more compressed achenes.

Ventral surface of a leaflet of Early Meadowrue, Veiny Meadowrue, Veiny Meadow-rue: Thalictrum venulosum (Synonyms: Thalictrum confine, Thalictrum confine var. columbianum, Thalictrum confine var. greeneanum, Thalictrum occidentale var. columbianum, Thalictrum turneri, Thalictrum venulosum var. confine, Thalictrum venulosum var. fissum, Thalictrum venulosum var. lunellii, Thalictrum venulosum var. turneri) - Male inflorescence of Early Meadowrue, Veiny Meadowrue, Veiny Meadow-rue: Thalictrum venulosum (Synonyms: Thalictrum confine, Thalictrum confine var. columbianum, Thalictrum confine var. greeneanum, Thalictrum occidentale var. columbianum, Thalictrum turneri, Thalictrum venulosum var. confine, Thalictrum venulosum var. fissum, Thalictrum venulosum var. lunellii, Thalictrum venulosum var. turneri)

Underside of a leaf and the flowers of a male inflorescence of veiny meadowrue as seen along FS Road #38-200 near Spanish Peak, Ochoco National Forest.........June 14, 2015.

Female inflorescence of Early Meadowrue, Veiny Meadowrue, Veiny Meadow-rue: Thalictrum venulosum (Synonyms: Thalictrum confine, Thalictrum confine var. columbianum, Thalictrum confine var. greeneanum, Thalictrum occidentale var. columbianum, Thalictrum turneri, Thalictrum venulosum var. confine, Thalictrum venulosum var. fissum, Thalictrum venulosum var. lunellii, Thalictrum venulosum var. turneri) - Male inflorescence of Early Meadowrue, Veiny Meadowrue, Veiny Meadow-rue: Thalictrum venulosum (Synonyms: Thalictrum confine, Thalictrum confine var. columbianum, Thalictrum confine var. greeneanum, Thalictrum occidentale var. columbianum, Thalictrum turneri, Thalictrum venulosum var. confine, Thalictrum venulosum var. fissum, Thalictrum venulosum var. lunellii, Thalictrum venulosum var. turneri) - Early Meadowrue, Veiny Meadowrue, Veiny Meadow-rue: Thalictrum venulosum (Synonyms: Thalictrum confine, Thalictrum confine var. columbianum, Thalictrum confine var. greeneanum, Thalictrum occidentale var. columbianum, Thalictrum turneri, Thalictrum venulosum var. confine, Thalictrum venulosum var. fissum, Thalictrum venulosum var. lunellii, Thalictrum venulosum var. turneri)

What may be veiny meadowrue as seen on Lookout Mountain, Ochoco National Forest..........June 15, 2015. I'd want to look at the mature fruits for a better identification as T. fendleri and T. occidentale are also in the area, although they haven't been observed on Lookout Mt.

Early Meadowrue, Veiny Meadowrue, Veiny Meadow-rue: Thalictrum venulosum (Synonyms: Thalictrum confine, Thalictrum confine var. columbianum, Thalictrum confine var. greeneanum, Thalictrum occidentale var. columbianum, Thalictrum turneri, Thalictrum venulosum var. confine, Thalictrum venulosum var. fissum, Thalictrum venulosum var. lunellii, Thalictrum venulosum var. turneri)

What is probably veiny meadowrue as seen under aspens along a western fork of Rock Creek about a mile uphill to the west of Hot Springs Campground, Hart Mt. National Antelope Refuge..........June 9, 2016. This is the only speciesof meadow-rues listed by the Oregon Plant Atlas for this area, although it is possible that other species may reside here too.
Paul Slichter