Oberonia claviloba Jayaweera. . . .... . XIII 
Oberonia dolabrata Jayaweera ........ XII 
Oberonia fornicata Jayaweera. . . ..... XVI 
Oberonia quadrilatera Jayaweera ....... XI 
Oberonia Wallie-Silvae Jayaweera . .... XIV 
Oberonia weragamaensis Jayaweera . .....XV 
Philoglossa peruviana DC. . . . . ...... Lil 
Philoglossa peruviana DC. var. sapida Bristol. . LI 
Pleurothallis coffeicola Schltr... . 2... 2... UV 
Pleurothallis parvilabia C. Schweinf. . . 2... 2... Vv 
Pollen size variation in maize, teosinte, Tripsacum 
and Manisuris . 6 4-4 hw & «ee w LVI 
Psilocybe mexicana Heim . ...... . XXXII 
Resia nimbicola H. . Moore. . . ... ..IX,X 
Rivea corymbosa (L.) Hall f.. . . XXXV,XXXVI 
Saccolabium tortifolium Jayaweera .... XVIII 
Salvia divinorum Hpling & Javito XXVIII, XXXII 
Saurauia Alvaroi PR. H. Schult. 2. . 2... XXXIX 
Spiranthes callifera C. Schweinfi. . . 2... . . I 
Spiranthes longiauriculata C. Schweinf. . . . . . . Il 
Structural formulas of alkaloids from Rivea corym- 
bosa and Ipomoea violacea seeds . . . . XXXIV 
Taeniophyllum gilimalense Jayaweera . . . . XIX 
Tapirira durhamii from Baltic amber... . XLIV 
Tripsacum. A representation of its hypothetical 
OMiG@IR «+ i @ eb ewe ewe eee oe & wooded 
[ ix ] 
