Tecophilaea cyanocrocus has exquisite gentian blue flowers with white stripes. Amazing.

Tecophilaea cyanocrocus 'Leichtlinii' is a rare form of the Chilean blue crocus with white flowers tipped with rich, sky blue.

Tecophilaea cyanocrocus 'Storm Cloud' is a rare form of the Chilean blue crocus with white flowers tipped with lavender and bluish lavender in early spring.

Tecophilaea cyanocrocus 'Violacea' has velvety purple-blue flowers in early spring with thin white stripes.

Thalictrum delavayi is a tall, ethereal beauty with pendulous buds like lavender raindrops opening to reveal lavender wing-like petals.

Thalictrum delavayi 'Album' is the beautiful white form of this elegant species.

Thalictrum 'Hewitt's Double' is one of the best long-blooming meadow rues with double lilac pom poms!

Trillium albidum is rare in cultivation and so elegant in the shade garden with sessile white petals and mottled foliage.

Trillium apetalon is a very rare oddball Japanese species in which the petals are missing and the sepals are red to burgundy.

Trillium grandiflorum 'Flore Pleno'/'Plenum' is a rare and exquisite double form of the snow trillium with white rose-like flowers. Spectacular.

Trillium grandiflorum 'Snowbunting' is a rare and exquisite double form of the snow trillium with creamy white flowers. Spectacular.

Trilium kamtschaticum is a sister species from Asia to North America's western and snow trilliums. Beautiful.

Trillium pusillum is a dwarf woodland treasure with green to red-tinged sepals and white petals that age to pink.

Triteleia ixioides 'Starlight' produces clusters of two inch, creamy yellow, star-like flowers with purple-brown mid veins.

Climbing nasturtium, Tropaeolum speciosum, is a choice climbing vine with dainty stems and delicate, clover-like leaves that erupts into masses of bright red flowers in summer.

Tulipa kaufmanniana 'Waterlily' has bell-shaped, upward facing, pale yellow flowers whose petals flare, reflexing outwards.

Tulipa kurdica is a short tulip with brick red flowers with pointed petals and a blue-black base sitting just above the long, narrow, bluish foliage.

Tulipa linifolia (Batalinii Group) 'Honky Tonk' is a beautiful tulip in shades of pale lemon yellow sometimes flushed with pink above narrow, twisted foliage.

Tulipa marjolettii is a tall tulip with creamy yellow flowers with a pink flush.

Tulipa cretica 'Hilde' is a delicate beauty with white petals with deep yellow bases and variable streaks and flushes of pink.

Tulipa 'Calypso' has fiery orange-red flowers with yellow edges all above attractive blue-green foliage.

Tulipa 'Easter Surprise' has bold, lemon-yellow flowers with red, orange or peach highlights sitting just above the blue-green foliage.

Tulipa 'Mary Ann' is a gorgeous tulip in shades of white, pink, and raspberry red with yellow bases all above the blue-green foliage.