48 PANICACE.E. 



covered by the sheath-like bracts, the pedicels and rachis bearing 

 a few short spreading liairs. Sessile spikelet linear-lanceolate, about 

 6 mm. long; first glume firm, scabrous, flattened, obscurely nerved; 

 second a little sliorter, incurved, compressed-keeled, ;3-nerved ; the 

 fourth with a thin pointed projection 2 mm. long each side of the 

 twisted awn, which is about 1.5 cm. long. Pedicels 3.5 mm. long 

 bearing a rudimentary spikelet with an awn nearly twice its lengtli. 



Florida, Chapman, for F. L. Scribner, teste E. Hackel; also 

 A. P. Garber in 1887, Gariliev in 1892. 



Var. pruinatus Hack. D. C. Monog. Phan. 370 (1880). Kodes 

 and blades pruinose. Florida, Simpson. 



9. A. Schottii Kupr. Hack, in Mart. Fl. Bras. 2; Pars. 3 : 299 

 (1871). 



Culms slender, 40-80 cm. high, compressed; branches single 

 from the remote nodes. Sheatlis very smooth; blades rigid, acute, 

 10-20 cm. long, 2— i mm. wide, ghibrous. sometimes thinly hairy to- 

 Avard the base. Sjjathes 4-G cm, long, narrow, obtuse or acute, as 

 long as the exserted i)art of the peduncle or longer. Racemes 4-7 

 cm. long, slender, pilose; joints as long as the sessile spikelets; the 

 apex 1 mm. wide, unequally 2-toothed, glabrous on the back, ciliate 

 on the margii s. Sessile spikelets 7 mm. long; first glume firm, 

 linear, acuminate, subbimucioiuite, glabrous, pale red, obscurely 

 3-nerveil. the callus with a stout tuft of hairs; second glume acute, 

 1-nervcd, the keel scabrous; third glume ciliate, the fourth divided 

 nearly to the base, the awn 15 mm. long. Pedicellate s})ikelets on 

 slender pedun(!les as long as the joints, ciliate on the edges; spike- 

 lets suludate, 3 mm. long. 



Mexi(!o, Pahncr 7. 



10. A. fastigiatus Sw. Fl. Iiul. Occ. 20 : 207 (1788). 



Perennial; culms (10-90 cm. high, terete, branching, flower- 

 bearing brandies in threes, fastigiate, smooth. Sheaths loose, 

 keeled, scabrous or smooth; ligule acnte, many-nerved, glabrous, 

 wider than tlie blade, fl-10 mm. long; lower blades sometimes 30 

 cm. long, 1-4 mm. wide, all narrow at the base, setaceously acu- 

 mimite, flat or loosely folded, glabrons (ir s])aringly ciliate at the 

 base. Spathes linear-lanceolate, 5-7 cm. long. Kacemes 4-7 cm. 



