▁with ▁W . ▁B . ▁Mc D oug all ▁and ▁William ▁Tre lease . ▁By ▁ 1 9 2 8 , ▁she ▁earned ▁a ▁Ph D ▁from ▁Indiana ▁University , ▁where ▁she ▁stayed ▁as ▁an ▁instruct or ▁until ▁being ▁offered ▁a ▁position ▁at ▁D PU ▁as ▁an ▁assistant ▁professor ▁of ▁bot any . ▁Wel ch ▁was ▁eventually ▁promoted ▁to ▁Chair man ▁of ▁the ▁bot any ▁department ▁and ▁earned ▁a ▁grant ▁from ▁the ▁American ▁Philosoph ical ▁Society ▁to ▁study ▁in ▁Europe ▁for ▁a ▁year . ▁By ▁ 1 9 4 0 , ▁she ▁was ▁elected ▁secretary ▁of ▁the ▁Indiana ▁Academy ▁of ▁Science ▁and ▁promoted ▁to ▁Full ▁professor . ▁ ▁As ▁a ▁result ▁of ▁her ▁scientific ▁success , ▁Wel ch ▁became ▁the ▁first ▁female ▁president ▁of ▁the ▁Indiana ▁Academy ▁of ▁Science ▁in ▁ 1 9 4 7 . ▁Upon ▁Y un cker ' s ▁ret irement ▁in ▁ 1 9 5 6 , ▁Wel ch ▁was ▁selected ▁as ▁the ▁new ▁department ▁head ▁of ▁Bot any ▁and ▁B acter i ology . ▁During ▁her ▁time ▁as ▁head , ▁Wel ch ▁published ▁a ▁compreh ensive ▁manual ▁of ▁m oss ▁in ▁Indiana , ▁titled ▁" M oss es ▁of ▁Indiana ." ▁She ▁retired ▁in ▁ 1 9 6 1 ▁as ▁Professor ▁Emer it us ▁and ▁then ▁served ▁as ▁cur ator ▁of ▁the ▁Tr uman ▁G . ▁Y un cker ▁Her b arium . ▁In ▁ 1 9 6 4 , ▁she ▁became ▁the ▁inaug ural ▁winner ▁of ▁the ▁Out standing ▁Woman ▁Te acher ▁award ▁at ▁D PU .