DERIVATION OF THK FLORA AND FAUNA 20I 



Piptoiliaftiu)n I'resl. 20; N. Amer. to cxtratrop. S. Aiiicr. 



/'/color (\'alil) l^c'sv. Chile: Valdivia; lira/,., Argent. 

 Podophorus bromoides I'liil. In 22y \ referred to Brac/iyelyt/i nun Xlc-duwAud Ap/ian- 

 clytltni))t I lack, as tlie nearest relatives. Mr. C. K. HL'inL\Rl) 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 Ih-achyelytlirum is di.sjunct after a well-known pattern: />. craiuin (Schreb.) 

 Heauv., N.\\. Amer., and li. japo)iiiiiiii Hack, ex llonda, ("hina, Korea, Japan. 

 I'llXJER (/^tV) brings this genus to TY^stuceae-Festucinae next to ^Ipliaiiclytltruvi, 

 placing Podopliorus with the Brominae. 

 Chaetotropis Kunth. 2 (?3). 



itnberbis (I'hil.) Near the following. 



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

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



niasafiierana Pilger. "Gehort in die Verwandtschaft von A. cmiina L. In der 

 Tracht A. magellanica Lam. sehr ahnlich" (PlL(]ER igf). This is recorded from 

 Magell., Falkl., X. Zeal. (jj). F. B. H. Brown (,,^5.1.84) says that his A. rapemis 

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

 illustrations they seem to have little in common. 

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



chro)]wstacJiyimi Desv. Centr.-S. Chile. 

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

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



collhia Phil. S. Chile. 

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

 And. to Patag., Falkl. 



micrathera (Desv.) Griseb. S. Chile. 

 Megalachne Steud. 2 very distinct sp., berteroniana Steud. and masafuerana 

 (Skottsb. et Pilg.) Hubbard ms. Reduced to Bromus by PiLGER [197), but restored to 

 generic rank in his posthumous paper on the system of the Gramineae [ig8). 

 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. (KlKEN- 

 THAL). 



eragrostis 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? 

 Scirpiis L. About 400; cosmopolitan. 



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

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

 cally distinct {326). 



