83 
2°, Tetramerous flower. One of the petals has on its left grown 
together with an antisepalous stamen, while the antipetalous 
stamens flanking the same have coalesced. 
BROMELIACEAE. 
Billbergia macrocalyx Hook. 
Habitat Brazil. 
Coll. June 1896. 
Two antisepalous stamens have grown together with petals ; 
one sepal partly petaloid. 
GRAMINEAE. 
Andropogon procerus R. Br. 
Habitat Australia. 
Coll. ? 
The inflorescence shows median foliar prolification. 
Panicum spec. 
Habitat Java. 
Coll. November 1896. 
Median foliar prolification of the spikelets. 
Zea Mays L. 
Habitat trop. and temper. regions. 
Coll. Sept. 1897 by Dr. P. van Romsuren, culture garden at 
Tjikeumeuh near Buitenzorg. 
On the male panicle there are female flowers to be found. 
For this rather frequent aberration compare Penzie II p. 4959. 
The different cases collected by Mr. Surra show that the trans- 
formation of the 3 panicle into the 9 spadix presents all 
degrees of transition, from a few odd grains which replace the 
male flowers to quite large pieces of the axis and its branches. 
The condensation of these parts and the dilatation of the sheaths 
of leaves keep pace with one another. 
Imperata arundinacea Cyr. 
