Published in Gardens' Bulletin Singapore, in 1949, in volume 12, pages 295-302

Published in Gardens' Bulletin Singapore, in 1949, in volume 12, pages 303-306

Published in Gardens' Bulletin Singapore, in 1949, in volume 12, pages 307-310

Published in Gardens' Bulletin Singapore, in 1949, in volume 12, pages 311-377

Published in Gardens' Bulletin Singapore, in 1949, in volume 12, pages 378-403

Published in Gardens' Bulletin Singapore, in 1949, in volume 12, pages 404-407

Published in Gardens' Bulletin Singapore, in 1949, in volume 12, pages 408

Published in The Gardens’ Bulletin, Singapore, in 1949, in volume 12, issue 1, pages 1-293