2OO 



PATAGONIAN EXPEDITIONS I BOTANY. 



. Panicle contracted. 

 b. Leaves acicular, short, few. Panicle long-linear. Rays in 2's. Glumes violet. 



aciphylla. 

 b2. Leaves filiform. Panicle weak, rays flexuose. Spikelets large, violet ; flowers whitish. 



Awn geniculate. discolor. 



3. Leaves setaceous. 



c. Culms 10 cm., leafy. Panicle few-flowered. Floriglume bifid. Awn geniculate. 



pannda. 



c2. Culm 20 cm., sheathed at base. Rays in 2's. Spikelets 10, 4 mm. long, purplish. 

 Awn basal, long. fuegiana. 



i. D. ACIPHYLLA (Franch.) Speg. 



Cespitose. Culms 30 cm. tall, slender, 

 smooth. Leaves acicular, many times 

 shorter than the culms, only 1-2 on the 

 culm; ligules lanceolate. Panicle long- 

 linear, with paired, scaberulous, capillary 

 rays, these erect along the axis. Lower 

 glumes violet ; flowers not exceeding the 

 glumes ; the lower sessile, the upper on 

 the bearded axis surrounded by hairs. 



Magellan; Fuegia. (D. tenella Phil. 

 differs only by larger stature and habit.) 



D. ACIPHYLLA PUMILA (Franch.). 



Only 7 cm. high ; panicle short. 

 The type and the var. both at Punta 

 Arenas. 



2. D. ANTARCTICA (Hook. f. sub Aim}. 

 (Airidiiim elegantuluni Steud.) 



Low, cespitose, 2-7 cm., leafy; the 

 leaves with long sheaths, subulate-linear, 

 involute. Panicle large, 10-15 cm. long, 

 effuse. Spikelets lanceolate, i-2-flow- 

 ered, with rudiment of a third. Glumes 

 lanceolate, rough-keeled, exceeding the 



FIG. 37. 

 Deschampsia antarctica. The plant slight- 



Deschampsia antarctica. The plant slight- flowers . fl ora } R l ume deeply cleft, with a 

 ly reduced, showing its panicle ; also a spike- -T \ 



let magnified and floral glume with rudiment, straight basal CMU. (Fig. 37-) ( 



