58 PATAGONIAN EXPEDITIONS I BOTANY. 



Add Mad, p. 229: 



POA PRICHARDI Rendle. 



A dioecious, glaucous, perennial grass 30 cm. high, having a single 

 stemleaf 1 1 cm. long, with a ligule 6 cm. ; the strong striate sheath twice 

 as long as the blade, which is apically pungent; panicle compact, the 

 rachis and branches rough, short, densely spiculiferous ; spikelets turgid, 

 purplish; sterile glumes subequal, acute, 3-nerved; fertile glumes 6, 

 glabrous, 5-nerved ; pales one fourth shorter than the glumes in the female 

 flowers. 



S. Patagonia, by springs on slopes of the Buenos Aires Mt. by Lago 



Argentine. D. 



P. ROBUSTA Steud. Mac!., p. 230. 



Should be deleted, being identical with Festuca arenaria Lam., Macl., 



P- 233- 



P. robusta Steud. is No. 1191 in W. Lechler's Plantce Magellanicce. 



My examination of a specimen emanating from that collection, preserved in 

 the Stockholm Herbarium and signed with the above number, has proved 

 the identity of P. robusta with Festuca arenaria. 



The specimens collected by Hatcher at Coy Inlet and determined by 

 Macloskie as P. robusta Steud. have nothing to do with that species or, 

 properly speaking, with Festuca arenaria Lam., but belong to Poa mag- 

 ellanica Phil. (Macl., p. 229). D. 



P. SCABERULA Hook. fil. Macl., p. 231. 

 Syn. Poa dactyliformis Steud. 



This species has a somewhat wider area of distribution than stated by 

 Macloskie. It is rather common in W. Patagonia and occurs probably in 

 the whole district of the deciduous beeches. Noticed by me by Lago 

 Argentine, Lago Viedma, Lago San Martin and in the Rio Aysen valley. 

 Also known from N. Argentina. 



Poa dactyliformis Steud., No. 1151, in W. Lechler, Plantce Magellanicce 

 a specimen preserved in the Herbarium Stockholmiense has been ex- 

 amined by me agrees with P. scaberula, D. 



Add Macl., p. 231 : 



P. SCABERULA Hook. fil. Var GRACILLIMA Speg. 



Differt a typo gracilitate plantae, panicula spiciformi, lineari, angus- 

 tissima, elongata. 



