I collected a load of seed from the following at the end of last year,
if anyone would like some, email me direct with your address and I
will send you some.

Cimifuga ramosa "Brunette" - lovely dark foliage with tall spikes of
creamy
white flowers
Angelica gigas
Maurandya "Magic Dragon" - climber, red flowers
Cardiocrinum giganteum - giant Yunnan Lily - 3 to 4 years to flowers
though!
Atriplex hortensis rubra

Mark