Question: What penicillin developing scientist had an electoral district ,which includes a residential suburb split between the City of Salisbury and the City of Tea Tree Gully, named after him in South Australia?

Context paragraphs:
Houghton, South Australia: Houghton is a small town near Adelaide, South Australia.  It is located in the Adelaide Hills, in the City of Tea Tree Gully and the Adelaide Hills Council local government areas between Tea Tree Gully and Inglewood on the North East Road.

Tea Tree Gully, South Australia: Tea Tree Gully, frequently written "Teatree Gully", is a suburb in the greater Adelaide, South Australia area, under the City of Tea Tree Gully.  Tea Tree Gully is in the City of Tea Tree Gully local government area, the South Australian House of Assembly electoral district of Newland and the Australian House of Representatives Division of Makin.

Salisbury Heights, South Australia: Salisbury Heights is a suburb located in the City of Salisbury, Adelaide, South Australia.  The upper section of Salisbury Heights was originally established as Castieu Estate in the 1970s by a private consortium.  The blocks of land in this area were typically much larger than surrounding suburbs with half acre blocks compared to the usual quarter acre block.  In April 2017, the Salisbury Heights section of Tea Tree Gully Council was renamed and amalgamated with nearby Greenwith.

Para Hills, South Australia: Para Hills is a residential suburb of Adelaide, South Australia.  There is a light aircraft airport close to its boundary, and numerous sporting facilities, abundant parks and schools and two medium-sized shopping centres.  Most of the suburb is in the City of Salisbury while some is in the City of Tea Tree Gully.

Electoral district of Newland: Newland is an electoral district of the House of Assembly in the Australian state of South Australia.  It is named after pioneer Simpson Newland, a prominent figure in nineteenth-century South Australia.  It is a 69.3 km² suburban electorate in north-eastern Adelaide, taking in the suburbs of Banksia Park, Fairview Park, Lower Hermitage, Upper Hermitage, Houghton, St Agnes, Surrey Downs, Tea Tree Gully, Vista and Yatala Vale as well as parts of Chain of Ponds, Highbury, Hope Valley, Inglewood, Millbrook, Redwood Park and Ridgehaven.

King's Baptist Grammar School: King's Baptist Grammar School is in Wynn Vale, a north eastern suburb of Adelaide, South Australia, having moved from nearby Tea Tree Gully where it was known as "Tea Tree Gully Christian School".  The school is known throughout the region for numerous outstanding accolades.  The school is also recognized for its annual musical production, held at the Shedley Theater in Elizabeth.  In 2013, 950 students were enrolled at the school.

Electoral district of Tea Tree Gully: Tea Tree Gully was an electoral district of the House of Assembly in the Australian state of South Australia from 1970 to 1977.  The suburb of Tea Tree Gully has since been represented by the seat of Newland.

Vista, South Australia: Vista is a small north-eastern suburb of Adelaide, South Australia and is within the City of Tea Tree Gully local government area.  It is adjacent to Houghton, Tea Tree Gully, St Agnes and Hope Valley.

Electoral district of Florey: Florey is an electoral district of the House of Assembly in the Australian state of South Australia.  It is named after scientist Howard Florey, who was responsible for the development of penicillin.  It is a 16.1 km² urban electorate in Adelaide's north-east, taking in the suburbs of Modbury, Modbury Heights and Modbury North, as well as parts of Gilles Plains, Hope Valley, Para Hills, Para Vista, Redwood Park, Ridgehaven, Valley View and Wynn Vale.

Salisbury East, South Australia: Salisbury East is a suburb of Adelaide, South Australia, located 20 kilometres north of the Adelaide CBD.  It is split between the local government areas (LGAs) of the City of Salisbury and the City of Tea Tree Gully.

Supporting paragraphs: Electoral district of Florey Para Hills, South Australia
Answer: Howard Florey