MACLOSKIE I GRAMINE^;. 253 



dense, green-violet ; joints of rachis biconvex, subcompressed, 4-6 mm. 

 long at base of spike. Spikelets in 2's and 3's, 3-4-flowered, of these 2-3 

 fertile. Glumes alike, just shorter than the spikelet, lanceolate, acuminate. 

 Palea of lower flower 8-9 mm. long, the floral glume 2-lobed, short- 

 awned. 



(Chili) ; Magellan ; Fuegia. 



Around Ushuaia is a form with pilose sheaths and leaves. 



2. E. ALBOWIANUS F. Kurtz. 



Culm nearly a meter high, slender, with innovations from the rhizome. 

 Culm-leaves plane, glabrous with 17 cm. long sheaths and longer blades, 

 acuminate. Spike 7 cm. long, rigid, green or green-violet. Joints of 

 rachis biconvex, narrowly winged ; spikelets (sometimes in triplets) 15-20 

 mm. long, including awns, 3-flowered. Empty glumes inequilateral, 

 shorter than the spikelets, lanceolate, subulate or awned ; floral glume 

 1 6- 1 8 mm., ovate-lanceolate, 2-lobed, 3 of its 5 nerves continuing into 

 an awn. 



S. Fuegia; around Ushuaia; by Rio Gallegos (Dusen) ; W. Patagon. 



3. E. ANDINUS Trin. 



Culm slender, more than 30 cm. Leaves narrow, sparsely pilose; 

 ligules short, truncate. Spike slender, linear, 5-12 cm.; joints of rachis 

 plane inside, obtusely 4-angled ; 6-10 mm. long at base of spike. Spike- 

 lets in pairs, 10 mm. long, 2-3-flowered, i of them sterile. Glumes linear, 

 3-nerved, acuminate, awned, shorter than the spikelet. Palecz of lowest 

 flower subequal, 8 mm. long, narrow, the lower (floral glume) with awn 

 12-22 mm. long. 



(Chili) ; S. Patagon., on dunes by Lago Argentino. 



4. E. ANTARCTICUS Hook. f. 



Culms erect, 60 cm. tall, leafy, glabrous; sheaths 12 cm. Leaf-blades 

 shorter, plane, not exceeding the culms. Spike linear-oblong ; spikelets 

 2-flowered. Glumes free to the base, lanceolate, awned-acuminate, entire 

 or bifid. Flowers shortly pediceled; floral ghime awned, 5-nerved, hairy 

 upwards ; palea 2-toothed. 



One glume out of the 4 at each articulation is often bifid, the outer one 

 on one side. 



Magellan ; Fuegia. 



