204 



PATAGONIAN EXPEDITIONS : BOTANY. 



b2. Panicle spike-like. 



r. Tufted, 40 cm. Leaves linear-lanceolate, velvety. Spikelets silvery or purplish. 



Floriglume bifid, with short awn. spicatum. 



c2. Erect, 25 cm., and sterile culms. Leaves flat, hairy. Spikelets 5 mm. long, with 



extra rudiment, variegated. Floriglume long, awned. subaristatum. 



AT,. Spikelets 3-4- flowered. Panicle spike-like. 



b. Creeping. Culms 70 cm. Leaves scabrid inside. Spikelets 4 mm. Floriglume 5- 

 nerved, scabrid, awned or awnless. repots magellanicum. 



b2. Erect, 40 mm. Leaves linear-acuminate, with scabrous margin. Spikelets 5-7 mm. 

 long. Floriglume 2-mucronulate, awn as long as itself. variabile. 



i. T. ANTARCTICUM Trin. (non Nees). 



Erect, glabrous. Lowest node hairy. Sheaths and leaves 10-15 cm. 

 long, narrow-linear, scabrid on edges, otherwise glabrous. Panicle 7-10 

 cm., contracted to lax. Spikelets about 4-flowered, 7 mm. long. Empty 

 glumes unequal, the lower narrow, the upper ovate-acute. Floral glume 

 glabrous, 6 mm. long, acute, 2-mucronulate, awned two thirds up, awn 

 its own length. Palea shorter. 



(Chili; N. Zealand); Patagon. and Fuegia. (Speg.) 



2. T. AUREUM Tenore. (7! condensation Presl.) 



Panicle broad, rather dense, short. Spikelets 2-flowered, the upper 

 glume a little larger. Floral glume 2-aciculate, awned above the middle. 

 Ovary naked. Callus naked. Rachis with very short hairs. 



Fuegia. 



3. T. CERNUUM Trin. 



Ctilm slender, 70 cm. tall. Sheaths smooth or 

 hairy, leaf-blades about 17 cm. by 7 mm. Panicle 

 open, slender, nodding, 20 cm. long, its rays in clus- 

 ters, capillary. Spikelets usually 2-3-flowered, 6 mm. 

 long ; empty glumes 3 and 4 mm. long ; floral glume 

 scabrous, ovate-lanceolate, its awn bent. Grain with 

 hairy tip. 



(Arctic Russia, there with glabrous grain ; Japan ; 

 Calif.) ; Fuegia. 



FIG. 39. 4. T. DOZEI Franchet. (May be Deschampsia kingii 



Trisetumdozei. Panicle, Hook, f.) 



and enlarged spHcelet and c . ^ smooth, 3 O- 9 O cm. tall. Leaves 



floral glumes. (After Fran- 

 chet.) broad, folded, long-sheathing. Panicle large, its rays 



