56 PATAGONIAN EXPEDITIONS I BOTANY. 



character. The ligule of P. Dusenii, on the other hand, is long and 

 includes in the innovations the following leaf resembling a tube. 



POA FLABELLATA Hook. fil. 



Syn. P. ccespitosa Fors-t. 



The tussock grass is found also in South Georgia, in the Falkland 

 Is., and in the smaller islands, is almost dominant, often surrounded by 

 Chiliotrichium diffusum, and with Poa annua L. and Apium graveolens L. 

 growing near it. The tussock clumps are higher than a man, and leave 

 pathways between them, whereby one can penetrate. Though rough in 

 texture, they are a favorite fodder for herbivorous animals (S. Birger). 



P. FLABELLATA (Lam.) Hook. fil. var. MUCRONULATA Hack. nov. var. 



Differt a typo ligula brevissima truncata, paniculae laxioris interruptae 

 ramis basi nudis, glumis fertilibus brevissime mucronulatis, saepe incon- 

 spicue bidentatis. 



W. Patagonia, in the lower Rio Aysen valley. D. 



Add Macl., p. 228: 



P. FUEGIANA (Hook, fil.) Hack. var. INVOLUCRATA Hack., 



apud Skottsb. Flor. Feuerl., p. 7. 



Differt a typo panicula laxiuscula subnutante, glumis fertilibus callo 

 lana copiosa stricta (non contortuplicata) ^ -% glumae aequante barbatis, 

 carina nervisque submarginalibus in % /4 inferiora tantum parte sericeo- 

 pilosulis. 



S. Fuegia, in the alpine region near Ushuaia. D. 



P. GLAUCA Vahl. in Fl. Dan., p. 3, tab. 964 (1792). 



Syn. P. glauca]. P. Smith in English Botany, Tab. 1720. 



(P. ccesia Sm.) 



Root fibrous, culm erect, i foot, glaucescent, smooth, strictly striate, as 

 long as the leaves; ligules short and usually obtuse. Panicles erect, 

 diffuse, branching much, with subverticillate, scabrous rays, the radials 

 binate. Spikelets ovate, erect ; flowers remote ; dorsally woolly ; mar- 

 ginally scarious and silky. (The description is of P. glauca Fellm. 

 Quaere whether it agrees with P. glauca Vahl.) 



Europe. Smith in English Botany, Ed. i, Tab. 1720. 



