The snow trillium (T. nivale) is one of the smallest species. Photo by Gillian Vine. : Chilled plant gets better with age

Some of Trillium Nook's double white Trillium grandifolium Flore Pleno. Photo by Mark Price. : Chilled plant gets better with age

Trillium chloropetalum is popular for its large red or white flowers and sweet perfume. Photo by Gillian Vine. : Chilled plant gets better with age

T. grandiflorum Flore Pleno, propagated by James Urquhart, of Hawea. Photo by Mark Price. : Chilled plant gets better with age

Delicate markings feature on little Trillium rivale Purple Heart. Photos by Gillian Vine. : Chilled plant gets better with age

Sessile trilliums, like these, have no flower stems. : Chilled plant gets better with age