MACLOSKIE I GRAMINE/E. 223 



A2. Leaf-margins rough ; surface smooth. Panicles lax. 



b. Culms to 25 cm. Leaves convolute. Spikelets large, 4-5-flowered, purplish, enclosed 



by woolly hairs. comniersoni. 



b2. Culms to 50 cm. Radical leaves narrow-linear. Spikelets few, 2-5 (8)-flowered, rachis 



flexuose. stenantha. 



A$. Leaves scaberulous or sometimes glabrous. 



b. Panicle pyramidal, dense above. Spikelets 3-6-flowered, purplish. Floriglume basally 



webby. Culm 40 cm. pratensis. 



b2. Panicle mostly lax, 4~5-spiculate. Glumes acuminate. Upper flowers viviparous. Culm 



50 cm., leafy at base. fuegiana. 



3. Panicle mostly contracted. Culms 35 cm. 



c. Spikelets small, woolly. Leaves few, setaceous-convolute, the sheaths scaberulous. 



Panicle linear. scabenda. 



c2. Spikelets 3-flowered, dioecious. Leaves convolute, the lower flat (pubescent?). 



chilensis. 

 A^. Leaves scabrous. Culm 50 cm. 



b. Panicle lax. Leaves acuminate. Spikelets 2-5-flowered, often violet. Floriglume basally 



webby. nemoralis. 



b2. Panicle spike-like. Culm 3 -nodal, exceeding the leaves. Leaves convolute, scabrous 



above. Ligules long, 2-partite. Spikelets long, 5-8-flowered patagonica. 



A$. Leaves scabrid-edged, plicate, pungent. Dioecious, with large, secund panicle, and spikelets 

 2-flowered. chubutensis. 



i. P. ALOPECURUS Kunth. (Festuca arundo Hook, f.) 



Large, reaching a meter in height; leaves glabrous, distichous, equal- 

 ling the culm ; sheaths long. Panicle ample, contracted. Spikelets gla- 

 brous, compressed, 6-8-flowered; glumes minutely ciliate on back and 

 margin, floral glumes acute, dorsally ciliate, woolly at base. Palea minute. 



Magellan ; Falklands. Next to the tussock, it is the largest grass there ; 

 varying much in size of the plant, and of its leaves, spikelets, etc. It is 

 harsh and rigid, and thus unpalatable to cattle. 



2. P. ANNUA Linn. 



Low annual or biennial, under 30 cm. Leaf-stieaths loose, overlapping. 

 Ligules 2-3 mm. Panicle open, its rays spreading. Glunie no. i narrow, 

 i -nerved; two thirds as long as the broad 3-nerved second ; theyfora/ 

 glume not webby at base. 



(Brit. & Br. i, 201. Eurasia ; naturalized in N. Amer.) Punta Arenas ; 

 Ushuaia (Dusen); over S. Patagon.; S. Fuegia. 



