DERIVATION OF THE FLORA AND FAUNA 203 



Ochagavia elegans Phil. Very near the Chilean genus Rliodostachys\ see 22g. iio 

 and 24g. jy^. 



Juncaceae. 



Luzula DC. A world-wide essentially temp, and mainly boreal genus of about 

 80 sp., also represented on trop. mountains and in the S. Braz. highland; south 

 to Fueg., Falkl. and N. Zeal. 



masafuerana Skottsb. Nearly related to some Andean sp. (Mex., Boliv.- 

 Fueg.) neading taxonomic revision. 



Junciis L. Mainly temp.-subtrop.; about 225. Well represented S. hemisph. (about 

 50), especially Austral, and N. Zeal., less so temp. S. Amer. 



imbricatus Laharpe. Ecuador-S. Chile, Braz., Argent., Urug. 



capillaceus Lam. Ecuador, Centr. Chile, Braz., Argent., Urug. Introduced? 



procerus E. Mey. S. Chile. 



dombeyanus Gay. Peru, Chile, Braz., Argent., Urug. 



plaiiifolius R. Br. S. Chile, Austral., Tasm., N. Zeal. Introduced.^ 



Iddaceae. 



Libertia Spreng. 5 sp., 3 Chile, 2 N. Zeal. 

 formosa Grah. S. Chile. 



Piperaceae. 



Peperomia Ruiz et Pav. Possibly over 1500; pantropical. 



berteroana Miq. Extremely like P. tristanensis Christoph. from Gough I.; 

 see 24^. 



margaritifera Bert, ex Hook. Possibly related to P. Reineckei C. DC. (Samoa). 



Skottsbergii C. DC. Allied to the former. 



These species form a separate subgenus Tildenidium Skottsb. (^^7), which 

 seems to stand closer to palaeotropical than to neotropical groups. P. berteroayia 

 and tristanensis show affinity to P. urvilleana A. Rich. (Austral., N. Zeal., Lord 

 Howe I., Norfolk I.) and P. Vente7iati Miq, (Java). 



fernandeziana Miq. Central (Frai Jorge, Talinay) and S. Chile (Valdivia). Be- 

 longs to subgen. Sphaerocarpidium. 



Urticaceae. 



Urtica L. About 40 sp. widely scattered in temp, zones on both hemisph., well 

 represented in Amer. (13, Mex.— Fueg.). 



Masafuerae Phil. Related to [/. echinata Benth. (Ecuador). 



fernandeziana (Rich.) Ross. A very distinct species without near relatives 

 (Weddell). 



Boehmeria Jacq. About 100, trop.-subtrop. 



excelsa (Bert, ex Steud.) Wedd. Seems to be more nearly related to Pacific 

 than to American species. Very similar to B. dealbata Cheesem. (Kermadec Is.). 



