Cosmos atrosanguineus

Peter Taggart
Sun, 16 Sep 2012 08:17:20 PDT
see here
the plant grows easily enough protected from hard frost, it dosn't have
substantial 'tubers' for drying in winter like some of the garden Dahlias

On Sun, Sep 16, 2012 at 3:25 PM, James Waddick <> wrote:

> Dear Friends,
>         I am sure regular readers of this forum and of the wiki are
> aware of the odd history of this tuberous species. See
>         The plant was originally collected in Mexico, then believed
> to have become extinct. All cultivated plants are a single clone
> propagated by micro-propagation or division of its Dahlia-like
> tubers. The plant is sterile and produces no seed.
>         A few years ago a fertile  seed strain was 'discovered' in
> New Zealand and has slowly entered cultivation.  Seedlings can be
> crossed with the established clone to produce fertile seed and at
> least a couple of new cultivars have been developed.
>         By an odd coincidence I was recently given a small quantity
> of seed of  this still very rare plant. ......

More information about the pbs mailing list