MACLOSKIE I GRAMINE^E. 2OQ 



2. S. DENSIFLORA Brongn. 



Spikes cylindrical, subfusiform. Branches on all sides imbricate, ap- 

 pressed. Spikelets lanceolate, coriaceous, glabrous, lucid. Keels denticu- 

 late. 



(Chili) ; Patagon. 



3. S. PATAGONICA Speg. 



Densely cespitose, glabrous. Culms leafy to the top. Leaves dis- 

 tichous, erect, their limb short, convolute, obtusely acute ; sheath very 

 long, close ; ligule very short, ciliolate. Spikes secund, laterally com- 

 pressed; rachis glabrous, dorsally channeled, with 8-12 spikelets, which 

 are distichously unilateral, compressed and imbricate. Lower glume 

 2-3 times shorter than the upper, and narrower ; the upper equalling the 

 flower ; palea glabrous, the inner finely membranaceous. 



S. Patagon., at mouth of Rio Sta. Cruz. 40-70 cm. high. 



33. CAPRIOLA Adans. (Cynodon Pers.) 



Perennial grasses with short flat leaves, and flowers in digitately ar- 

 ranged spikes. Spikelets i -flowered, secund. Glumes 3, the floriglume 

 broadest and compressed ; palea shorter, 2-keeled. Stamens 3 ; styles 

 distinct. Grain free. 



Species 4, 3 Australian, and I cosmopolitan in warm countries. 



C. DACTYLON (Linn.) O. Ktze. Bermuda-grass. 



Culms 1-3 dm. tall, erect, glabrous; sheaths crowded at base or on the 

 stolons. Leaves flat, rough on upper surface. Spikes 4-5, rachis flat. 

 Floriglume broad and much compressed. 



(Eur., U. S. from N. Y. southwards.) N. Patagon., near Rio Colorado. 



34. CHLORIS Swartz. 



Leaves flat; spikes i-many, often in pairs or digitate; spikelets in 2 

 rows on one side of the rachis, articulated above the empty glumes, which 

 are unequal, keeled, acute ; floral glumes awned, the lowest enclosing a 

 perfect flower, at length enclosing the free grain. (Fig. in Brit. & Br. i, 

 178.) 



i. C. PETR>EA Thurb. 



Culm simple, erect, 30-60 cm. tall, glabrous, leafless. Leaves sub- 

 distichous, linear, serrulate, ciliate, their sheaths equitant, compressed. 



