152 



THE AMERICAN NATURALIST 



[Vol. XLI 



mary adaxial bundles, whose identity is not so clearly maintained 

 as in O. TnoliKcanum. In a section at the base of the lamina the 



arrangement of the bundles is very much the same as in 0. moluc- 

 canum, and the three bundles of the spike are very similar. The 

 triple arrangement continues into the spike, and a section made 

 well above the base shows practically the same appearance. 



O. CALIFORNICUM PrANTL. 



0. calijomleum is a small 

 species from southern Cali- 

 fornia. In the anatomy of 

 the leaf it seems to follow 

 pretty closely the description 

 given by Prantl for O hmta- 

 nicum. A section of the petiole 

 (Fig. 11 , A i show^ four tuhixial 

 bumllcs, aii.l a >innl,. ahaxial 



a medium sized specimen; Z), section of cle and lamina - Fi.U'. 1 1 , H) the 

 20. . , spike shows in some cases but 



a single large bundle, evidently 

 formed by the coalescence of the adaxial bundles. There are five 



