The late summer explosion of yellow composites has subsided greatly over the past week—Missouri conflower (Rudbeckia missouriensis) and rosinweed (Silphium integrifolium), and ashy sunflower (Helianthus mollis) have all gone to seed, and only sporadic still-blooming individuals of prairie dock (Silphium terebinthinaceum) and goldenrods—including old field goldenrod (Solidago nemoralis), stiff goldenrod (S. rigida), and Gattinger’s goldenrod (S. gattingeri)—can be found. Gattinger’s goldenrod, in particular, deserved extra attention, as this species has only a few known population centers and comes as close to a true Missouri endemic as any plant species in the state. It can be distinguished by its basally disposed, glaucus leaves which become very small on the upper stem and its pyramidal inflorescences radiating out from the stem in all directions.
The decline of the fall composites does not mean, however, that the glades are now without color, as vibrant purples still dot the glade perimeter in the form of Liatris asperas (rough blazingstar).
Sumacs, as well—both shining (Rhus copallinum) and fragrant (R. aromatica), and flowering dogwood (Cornus florida) have already begun turning rusty to bright red.
Nor does it mean that nothing new is coming into flower—Great Plains ladies’-tresses orchid (Spiranthes magnicamporum) are blooming for the first time this week, and I saw numerous individuals still developing their inflorescences to suggest a fantastic October display is around the corner.
©️ Ted C. MacRae 2021