Flower Head Side
Turtle Mountain Provincial Park, Manitoba
Note that the key to the genera in Budd's Flora describes the receptacles as convex, not flat. However, the key in Flora of Alberta describes them as conic or columnar, not flat or convex. Flora of the Great Plains describes them as hemispheric or columnar.
Note that the key to the genera in Flora of Alberta requires that the involucral bracts be in one or more series but all of the same nature; NOT in 2 distinct, dissimilar series. However, the bracts in this species are in about two series and irregular in size, with the inner bracts generally smaller than the outer.
Hirta: Answers to key questions in Budd's Flora leading to this species.
Rudbeckia: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus.