Between 1984 and 1989 , he was a research fellow at the East African Herbarium , a herbarium that is part of the National Museums of Kenya in Kenya .
Since 1975 , Beentje has been active in Africa .
Between 1984 and 1989 , Beentje was a Beentje   at the East African Herbarium , a herbarium that is part of the National Museums of Kenya in Kenya .
Since 1975 , Beentje has been active in Africa .