Primulas of Columbia Plateau
Most common and widespread are P. conjugens and P. pauciflora.
One distinguishing trait is the way the flower tube join near their top:
smoothly connected, appearing almost merged into a cylinder is P. pauciflora
clearly separated with deep clefts between them is P. conjugens, which is also less common and never on the west side (which sounds opposite, presumably conjugens doesn't refer to the tube joins)
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