Gentiana asclepiadea

Willow gentian in bloom with hosta. (Photo by Brendan Zwelling)

Willow gentian in bloom

Judith Adam

Around the corner in my air-conditioner garden, the willow gentian (Gentiana asclepiadea, Zone 5) is in full bloom.

Yellow rudbeckia, a tall beauty. (Photo by Brendan Zwelling)

Autumn-blooming perennials

Judith Adam

There are many forms of coneflowers in the rudbeckia clan, all with reflexed yellow petals and brown, cone-shaped disks.