What is "haumania"

Haumania is a genus of plants native to Japan, New Guinea and central Africa. It contains 5 recognized species:

• Haumania danckelmaniana (J.Braun & K.Schum.) Milne-Redh., Kew Bull. 5: 162 (1950). - Africa (Central African Republic, Cameroon, Equatorial Guinea, Gabon, Congo-Brazzaville, Congo-Kinshasa)
• Haumania leonardiana C.M.Evrard & Bamps, Bull. Jard. Bot. État Bruxelles 29: 370 (1959). - Congo-Kinshasa
• Haumania liebrechtsiana (De Wild. & T.Durand) J.Léonard, Bull. Jard. Bot. État Bruxelles 19: 454 (1949). - Africa ( Cabinda, Gabon, Congo-Brazzaville, Congo-Kinshasa)
• Haumania microphylla Hoogland, Blumea, Suppl. 4: 228 (1958). - New Guinea
• Haumania walkeri Ohwi, J. Jap. Bot. 33: 212 (1958). - Japan