-
Revision of Thryallis (Malpighiaceae)
Vol 20, Page 3
-
Notes on Neotropical Malpighiaceae V
Vol 20, Page 15
-
Miscellaneous notes on the genus Sphagnum. 6
Vol 20, Page 129
-
Revision of Odontonema (Acanthaceae) in Mexico
Vol 20, Page 147
-
Euphorbiacearum sertum Novo-galicianarum revisarum
Vol 20, Page 173
-
The Carex lurida group (Cyperaceae) in the Neotropics
Vol 20, Page 217
-
New species of Leguminosae from Nayarit, Mexico
Vol 20, Page 231
-
The chromosomes of Sadleria (Blechnaceae)
Vol 20, Page 239
-
TAXONOMIC NOTES ON THE PTERIDOPHYTES OF HAWAII
Vol 20, Page 241