Grindelia howellii Steyerm.

Montana: Powell County: [locality and coordinates withheld; status in Montana: S2S3 (Rare; MTNHP)],
NNE aspect. Locally common along a gravel roadside and an adjacent meadow on a gentle slope. Plants uniformly scattered across meadow. Plants patchier, but at higher densities along road. Flowering plants numbered in the thousands. Most plants with obvious glandular-stipitate stems; 10% or less of plants have very sparse glandular-stipitate or glabrous stems. Plants to about 60 cm tall. Insects visiting flowers included species of Bombus, Hymenoptera, Lepidoptera, Hesperiidae, Numphalidae, and Hemiptera. With Phleum pratense, poa pratensis, Bromus carinatus, Geranium viscosissimum, Perideridia montana, Potentilla gracilis, Artemesia ludoviciana (only with the roadside population), Bromus inermis (uncommon), and Cynoglossum officinale (rare).

Shane Sater 2020-008, Aug 13, 2020
MONTU, Accession: 166743