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Note: Some common names may appear more than once in the group below. This indicates that the same common name is being used for more than one scientific name.

Thistle Poppy (2)	Thistle Poppy (1)	Thistle Sage (105)	Thistleleaf Aster (3)
Thomas Buckwheat (13)	Thomas Eriogonum (1)	Thomas' Buckwheat (5)	Thomas's Buckwheat (4)
Thompkins' Sedge (6)	Thompkins' Sedge (3)	Thompson Beardstongue (1)	Thompson Penstemon (6)
Thompson Peteria (1)	Thompson Seedless Grape (3)	Thompson Yucca (1)	Thompson Yucca (9)
Thompson's Beardtongue (17)	Thompson's Broadleaf/ Columbia River Gorge Lupine (1)	Thompson's Indian Paintbrush (3)	Thompson's Iris (15)
Thompson's Mistmaiden (23)	Thompson's Paintbrush (10)	Thompson's Penstemon (11)	Thompson's Peteria (5)
Thompson's Woolly Locoweed (2)	Thompson's Yucca (3)	Thompson’s Chaenactis (4)	Thorn Apple (1)
Thorn Apple (3)	Thorn Apple (3)	Thorn Apple (22)	Thorn Karooviolet (1)

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