These were growing in an open meadow at 4900' with shooting stars, hesperochiron, saxifrage, and a couple of bigger onions (Tolmie's and Douglas', I think) nearby.
All photos taken on hike to Duck Lake, Upper Idaho Granitic Batholith, McCall, Idaho. Identifications provided by Barbara Ertter, former Herbarium Manager, UC Berkeley, Berkeley, California; now retired and living in Boise, Idaho.
Leaves suborbicular, palmately veined, clasping; stem simple, erect, hairy.
Near Iris tenax x chrysophylla hybrid zone (Clarkson 1959).
Specimen: cream to buttery yellow flowers, thick bracts, very long perianth tube.
Conclusion: Appears to be mostly consistent with Iris chrysophylla
From Clarkson (1959)
"At all three of these sites individuals have been found which are intermediate between the parent species and which cannot be assigned to either species. Bracts of the hybrids are opposite and are broader than is characteristic of I. tenax but not so broad as those of I. chrysophylla ; flower color is maroon to grayish-lavender ; and the perianth parts are slender. The plants are smaller than typical I. tenax but have a definite stem. Perianth tube length in the natural hybrids averages 2.2 centimeters and the pedicel averages 1.4 centimeters. Comparative measurements in the known hybrids are perianth tube 2.5 and pedicel 1.8."
Clarkson QD. 1959. Field studies of natural hybridization in the Oregon species of Iris L. subsection Californicae Diels. Madroño, 15(4), 115–122.
Growing in a natural rock garden at 3000 ft. elevation in the Oregon Coast Range, one of the few locations for this species in Oregon.
sketched 08/05/2017 Soda Creek Trail, p. 17, simiola monkeyflower # 4 --
Erythranthe tilingii - type group (vs. guttata)