Complex sentence: Cecile Hulse Matschat (1895-1976) was an American geographer and botanist, known best as the author of books on gardens, gardening and the Okefenokee Swamp.
Split into simpler sentences: Cecile Hulse Matschat (1895-1976) was an American author, geographer and botanist. Matschat primarily was a writer of books on gardens, gardening and the Okefenokee Swamp.