Shortly afterwards , the British palaeobotanists Frank Oliver and Dukinfield Henry Scott ( with the assistance of Oliver 's student at the time Marie Stopes ) made the critical discovery that some of these fronds ( genus Lyginopteris ) were associated with seeds ( genus Lagenostoma ) that had identical and very distinctive glandular hairs , and concluded that both fronds and seeds belonged to the same plant .
British palaeobotanists made the critical discovery that some of these fronds were associated with seeds , and concluded that the fronds and seeds belonged to the same plants .