246 PATAGONIAN EXPEDITIONS I BOTANY. 



sheathed half-way, shining. Spike short, lax, few-flowered. Spikelets 

 sessile. Empty glumes obovate, glabrous, awnless. Floral glume 5-7- 

 nerved, coriaceous, scabrid upwards, awned; palea hyaline, subretuse, its 

 margin pectinate-ciliolate. 



W. Fuegia, by margin of salt lakes. 



A. FUEGIANUM PATAGONICUM Speg. 



Leaves and sheaths glabrous. Ligules more developed than in the 

 type. Spike more depauperate ; spikelets more remote. Glumes longer, 

 awned. Floral glume more glabrous. 



S. Patagon., by Gregory Bay, and Rio Sta. Cruz. 



3. A. MAGELLANICUM Hack. ( Triticum repens magellanicum Desv. 71 



magellanicum var. glabrivalva Speg.) 



Rhizome creeping. Culm 45-90 cm. high. Leaves internally punctate- 

 scabrid, plane or convolute; ligules very short, toothed. Spike 8-15 

 cm. long, green. Spikelets erect, rather lax, oblong-elliptical, com- 

 pressed, 12-16 mm. long, 3-4-flowered. Glumes subequal, half as long 

 as the spikelets, convex, 4-6-nerved, inequilateral, muticous or mucronate, 

 apically erose. Floral glume 5-nerved, oblanceolate-elliptical, muticous 

 or short-awned, often emarginate, outside densely hairy-scabrid. 



S. Patagon. on eastern and western coasts ; Magellan ; Fuegia ; Staaten ; 

 Falklands. 







A. MAGELLANICUM coNDENSATUM (Presl.) Speg. (sub Triticuni]. 



Leaves involute, rather scabrous ; sheaths glabrous ; ligules short 

 (i mm.), truncate, entire. Spike distichously branching, dense, erect, 

 strict (7 cm.). Rachis triquetrous. Spikelels 6-flowered. Glumes oblong- 

 lanceolate, acute, 7-nerved, half as long as the lanceolate flowers ; floral 

 glume 5-nerved, scabrous, mucronate ; palea emarginate, bidentate. 



Perennial (Chili?); Fuegia; S. Patagon. by Rio Sta. Cruz. 



A. MAGELLANICUM FESTUCOIDES Speg. 



Pedicels long. Flowers at length lax. Empty and floral glumes more 

 narrow and acute than in the type. (Perhaps a distinct species.) 

 S. Patagon., by Rio Sta. Cruz. 



