[1] In the descriptive paper naming T. postnastae Manchester et al reported that radioisotope dating of plagioclase crystals collected by Robert Rosé from the fossiliferous horizon of the Moose Mountain flora had been performed.

Using crystals obtained from tuffaceous sandstones, Argon–argon dating provided an age of 14.91 ± 0.23 Ma placing the flora as Middle Miocene Langhian stage.

In 1991, Manchester et al made the first mention of several infructescences, including a figured specimen from the Latah Formation at Emerald Creek, Idaho.

[4] Similarly a fossil first figured by Fields (1996)[5] from the Sucker Creek Formation in eastern Oregon[6] is also considered to belong to T. rosayi.

[2] The locular slits form just above the straight to slightly outwardly curved persistent styles which sprout from the fruit 1/3 of the way below the apex.