▁plants ▁described ▁as ▁a ▁genus ▁in ▁ 1 7 7 8 . ▁It ▁is ▁w ides p read ▁across ▁much ▁of ▁Europe , ▁Asia , ▁and ▁North ▁America . ▁ ▁T of ield ia ▁was ▁once ▁placed ▁in ▁the ▁l ily ▁family , ▁but ▁now ▁generally ▁included ▁in ▁the ▁newer ▁family ▁T of ield ia ceae . ▁The ▁genus ▁sometimes ▁includes ▁species ▁of ▁genus ▁T rian tha . ▁T of ield ia ▁are ▁rh iz om at ous ▁per enn ial ▁her bs ▁with ▁sp ikes ▁or ▁rac emes ▁of ▁l ily - like ▁flowers . ▁ ▁The ▁name ▁T of ield ia ▁comm emor ates ▁the ▁British ▁botan ist ▁Thomas ▁T of ield . ▁ ▁Species ▁ ▁T of ield ia ▁cal y cul ata ▁( L .) ▁W ahlen b . ▁- ▁much ▁of ▁Europe ▁from ▁Spain ▁to ▁Ukraine ▁ ▁T of ield ia ▁c ern ua ▁Sm . ▁- ▁Si ber ia ▁+ ▁Russian ▁Far ▁East ▁ ▁T of ield ia ▁c occ inea ▁Richard son ▁- ▁Russia , ▁Mong olia , ▁China , ▁Japan , ▁Korea , ▁Al aska , ▁Canada ▁ ▁T of ield ia ▁diver gens ▁Bureau ▁& ▁Fran ch . ▁- ▁China ▁( Gu iz hou , ▁S ich uan , ▁Y unn an ) ▁ ▁T of ield ia ▁fur use i ▁( Hi y ama ) ▁M . N . T am ura ▁& ▁F use ▁- ▁H ons hu ▁ ▁T of ield ia ▁gl ab ra ▁N utt . ▁- ▁North ▁and