DERIVATION OF THE FLORA AND FAUNA 



Piptochaetium Presl. 20; N. Amer. to extratrop. S. Amer. 



bicolor (Vahl) Desv. Chile: Valdivia; Braz., Argent. 

 Podophorus bromoides Phil. In 22y I referred to Brachyely thrum Beauv. and Aphan- 

 elythrum Hack, as the nearest relatives. Mr. C. E. Hubbard kindly informed me 

 that it resembles the former in a number of important features and that he regards 

 both genera as belonging to a relatively ancient group of grasses. The distribution 

 of Brachyely thrum is disjunct after a well-known pattern: B. erectum (Schreb.) 

 Beauv., N.E. Amer., and B. japonicum Hack, ex Honda, China, Korea, Japan. 

 PiLGER (/p^) brings this genus to Festuceae-Festucinae next to Aphanely thrum, 

 placing Podophorus with the Brominae. 

 Chaetotropis Kunth. 2 (?3). 



imberbis (Phil.) Near the following. 



chilensis Kunth. Peru, Chile, Braz., Argent., Urug. 

 Agrostis L. About 125; very wide-spread in temp, and cold climates. 



masafuerana Pilger. "Gehort in die Verwandtschaft von A. canina L. In der 

 Tracht A. magellanica Lam. sehr ahnlich" (PiLGER ipy). This is recorded from 

 Magell., Falkl., N. Zeal. (55). F. B. H. Brown (j5. I. 84) says that his A. rapensis 

 from Rapa Id. is "very closely allied" to magellajiica, but to judge from his 

 illustrations they seem to have little in common. 

 Trisetum Pers. About 65 ; N. and S. temp, (also S. Braz.). 



chromostachyum Desv. Centr.-S. Chile. 

 Danthonia DC. About 100; essentially southern (S. Amer., S. and E. Afr., Austral., 

 N. Zeal.), but extending north to N. Amer., S. Eur., and India. 



collina Phil. S. Chile. 

 Koeleria Pers. 60 (Domin); N. temp., S.E. Austral., Tasm., N. Zeal., S. Amer. 

 And. to Patag., Falkl. 



micrathera (Desv.) Griseb. S. Chile. 

 Megalachne Steud. 2 very distinct sp., better oniana Steud. and masafuerana 

 (Skottsb. et Pilg.) Hubbard ms. Reduced to Bromus by PiLGER {iQj), but restored to 

 generic rank in his posthumous paper on the system of the Gramineae [igS). 

 Chusquea Kunth. About 100 (.?) sp. Mex. to Argent, and S. Chile. 



fernandeziana Phil. Related to Chilean species. 



Cyperaceae. 



Cyperus L. A world-wide, essentially tropical genus of about 600 sp. (KuKEN- 

 THAL). 



er agrostis Lam. (vegetus Willd.). N. and Centr. Amer. to Braz., Urug., Argent. 

 and S. Chile; Easter I. Often introduced and perhaps not indigenous in Juan 

 Fernandez. 



reflexus Vahl. Mex. and Tex. to Braz., Argent, and S. Chile. Indigenous.^ 

 Scirpus L. About 400; cosmopolitan. 



nodosus Rottb. Circumpolar, S. temp. zone. Recently the Chilean plant was 

 segregated as .S. molinianus Beetle, but I am unable to recognize this as specifi- 

 cally distinct [326). 



