1. 1869-1957

2. Teacher Rare for a women to obtain a degree and become a teacher Researcher Bibliographer Professional interests Taxonomy Morphology Published works on Biogeography Phylogeny Economic uses of algae Never let her gender impede her

3. 1895-received her B.S. Offered a job with the college of Minnesota Began Teaching Appointed department librarian 1897-received her M.S. Promoted to instructor 1901-established Botanical Beach Seaside Station 1910-promoted to full professor

4. 1894-distributed Century American Algae Studied, collected and identified algae species Published 5 papers on flora 1895-published lengthy bibliography on the American Phycological Literature 1896-completed Century II of American Algae 1898-distributed Century III of American Algae 1901-1902-Century V and VI of American Algae 1906-published laboratory notes and directions in General Plant Morphology (Algae, Fungi and Lichens) 1910-comlpeted The Myxophyceae of North America and Adjacent Regions. Century VII the last of American Algae 1910-1912-Distributed first 3 Centuries of South Pacific Algae 1913-Completed 3 Centuries of South Pacific Plants 1915-1937-worked on her Index Algarim Universals – comprehensive bibliographic card file on the algae of the world (37,000 cards in the complete set)

5. Dedicated hard worker Had a passion for algae Uncanny skill for finding superb collecting sites Strong willed Inspired students 6 Ph D. students and numerous M.S. students completed their degrees with Tilden

6. After dedicating all that she had to her studies Tilden died in poverty in 1957 In her lifetime Produced 50 scientific papers 3 books 2 major exsiccatae American Algae South Pacific Algae