Alexander Curt Brade (1881–1971) was a German botanist who specialized in the study of the orchids and ferns of Brazil and Costa Rica.
After working for several years in Germany as an architect and construction engineer, he accepted an invitation to join his brother Alfred, who lived in San Jose, Costa Rica, and owned a horticultural business in Europe.
Not wishing to return to Germany and its cold winters, Brade joined another relative in Brazil in 1910, where he again worked in construction, botanizing in his spare time.
Brade later moved to the Rio de Janeiro Botanical Garden, where he rose to Acting Superintendent in 1934, ultimately becoming Head of the Department of Systemic Botany.
Retiring in 1952, Brade returned to São Paulo, where he built a home and dedicated himself to the classification of the ferns and Melastomataceae he had collected.