Yellow Perennial Daisy

The Hen House Gardens are fast turning into a foliage feast, but there are still a few hardy perennials on the sunny side by the lawn, like this anonymous yellow daisy.

It flowers in late summer, and is quite short and bushy - just less than knee-high. The flowers look like slightly complicated daisies, and they are definitely yellow. Now I'm starting to guess - this might be a dwarf type of perennial Helianthus. Hmm... I am definitely on shaky daisy ground here!

Hmm... Heleniums and Helianthuses...

The trouble is that I get Heleniums and Helianthuses mixed up, and I don't grow annual sunflowers (which I know are Helianthuses). My annuals and perennials book is unusually vague, for once. And before I blink you can bet my finicky web-site manager will disallow the plural form of Helianthus, as spelt above. Aargh! I should quit while I'm ahead!