Southern Nodding Trillium 
Sparse-flowered Orchid 
Steven's meadow saffron 
Subalpine mariposa lily 
Tiger Lily 
Toadshade 
Tolmie star-tulip 
Trailing Wakerobin 
Tricyrtis chinensis 
Trillium ovatum 
True lover's knot 
Tulipa aleppensis 
Tulipa cinnabarina 
Tulipa fosteriana 
Tulipa hissarica 
Tulipa humilis 
Tulipa julia 
Tulipa linifolia 
Tulipa orphanidea 
Tulipa praestans 
Tulipa saxatilis 
Tulipa undulatifolia 
Turkestan tulip 
Two-flowered Tulip