Delphinium depauperatum Nutt.
Annotated by Paul T. Sawyer, Jun 1969.

Idaho: Boise County: Ca 18 miles s. of Idaho City on road to Boise.
In deep sandy soil of granitic origin in sagebrush. Plants in moist soil of draw, with Wyethia, etc. Plants readily separatine from the shallow clusters of small tuberous fleshy (not at all fibrous) roots, the root system surprisingly small; stature of plant dependent upon competition from grasses, etc., and on relative looseness of soil, the smaller plants at sides of the colony, where drier; sepals mostly clear deep blue (occasionally slightly more purplish), not spreading, the lower ones pointing forward; lower petals more purple than blue, deeply bifid; upper petals fairly deep blue; flowers notably spicate-racemose; racemes simple (depauperate plant) to compound from the base in the larger, more vigorous ones; whole plant rather viscid-pubescent, the leaves very fleshy; spur 2 x blade of upper sepal, about equal to or longer than pedicel at anthesis; pedicels distinctly ascending; stems mostly not fistulose, but the largest stems somewhat hollow. Seepage not lasting all summer, but this plant blossoming much later than D. nuttallianum which had flowered and gone to seed and dried up in areas adjacent. Phenology: Flowers.

C. Leo Hitchcock s.n., May 29, 1956
With C.V. Muhlick
ID, Accession: 43958, Barcode: ID040587