Multiple Protea acaulos stem-tips from one plant, joined underground via woody branches may flower close together. This often happens directly at ground level as here, or on short, trailing stems.
The flowering of this Protea is erratic, only few heads from one plant commonly seen within a season, let alone concurrently.
Different flowerhead colours may mean that more than one plant grow close together, although colour change in ageing heads may also account for this in one plant.
The leaves of P. acaulos are more consistent in their erect bearing than in colour, size or shape on different plants (Manning, 2007; Rebelo, 1995; Rourke, 1980; iNaturalist).