Sterculia images

I've picked up a few public domain/GFLD/Creative Commons images from WikiMedia Commons for the Sterculia Gallery.

Hibiscus

Another plant from Fullerton Arboretum. I'd place it as a cultivar of Hibicus rosa-sinensis, possibly (note the toothed petal apices) with some Hibiscus schizopetalus in its ancestry, but perhaps there's a Hibiscus expert that knows better.

flower

.

Dombeya macrantha

I've been asked to identify another plant, photographed at the Fullerton Arboretum in California.

It has a trimerous laciniate epicalyx, 5 narrow sepals with a stellate indumentum, 5 red petals spirally arranged in a cup-shaped corolla, pentadelphous stamens placed antepetalously, and a gynoecium somewhat obscured by the androecium. The foliage is hairy, and bronzed when young. Obviously not a mallow except in the broadest sense.

Once I had convinced myself it was a dombeyoid I cheated and looked in the collections database on the Fullerton Arboretum website, comparing the 5 species of Dombeya held (it clearly wasn't either of the other two dombeyoids - Pentapetes phoenicea and Trochetiopsis ebenus - held by the institution). It turns out to be Dombeya macrantha, known by the Germans as Madagaskar Linde.

The photographs are - foliage, side view of part open flower, oblique view of flower, front view of flower, young leaves, side view of opening flower

Herrisantia crispa?

I've just received an email with a request for identification, of a couple of photographs of a plant from Key Largo.

It's not a species that I immediately recognise, but it's something in Abutilinae, and on first thought I suspected an Abutilon of some description. However after a little digging around the US malviflora I now suspect Herissantia crispa. Can anyone confirm or correct?

Update: Professor Fryxell confirms that it is Herissantia crispa.

First picture - assorted fruits and leaves

Second picture - a lonely flower