1 86 Graminece. [Trackys* 



1 8. TBACKYS, Pers. 

 A diffuse, softly villous annual; 1. ovate-lanceolate; infl. of 

 2-3 spikes radiating from the top of a long ped., rhachis 

 broad, herbaceous, jointed, each joint bearing on the under 

 surface at the articulation a solitary, globose, persistent 

 cluster of 2-3 perfect i-fld. spikelets, surrounded by many 

 short spinescent glumes of imperfect ones ; spikelets sessile, 

 persistent on a very short stout branched axis, glabrous;, 

 glumes 4, very unequal, I minute, tooth-like, II elongate- 

 subulate, membranous, hyaline, strongly veined, III much the 

 largest, obliquely obovate- oblong, cuspidately acuminate,, 

 rigidly coriaceous, 9 -many-veined, paleate, empty, sides 

 inflexed below the middle, palea very minute, IV much 

 shorter and narrower than III, linear-oblong, acuminate,, 

 chartaceous, smooth, dorsally convex, sides incurved, bi- 

 sexual, palea as long as the glume, acuminate, hyaline, sides 

 inflexed below the middle; lodicules very minute or o; stam. 

 3, anth. linear ; styles very long, stigmas very slender, 

 penicillate, exserted at the top of the glume; grain oblong,, 

 compressed, free within the glume and palea. — Monotypic. 



T. mucronata, Pers. Syn. i. 85 (1805). 



Thw. Enum. 362. Panicum squarrosum, Retz. Obs. iv. 1 5. C. P. 3262.. 

 Fl. B. Ind. vii. 96. Beauv. Agrost. t. 21, f. 7. Retz. 1. c. v. t. 1. Roxb. 

 Cor. PI. iii. t. 206 {P. squarrosum). 



Stems many from the root, 6-12 in., rather stout, ascend- 

 ing or prostrate, leafy, glabrous, shining, lower internodes 

 1-2 in., upper much longer, nodes villous; 1. 1-2 by \-\ in., 

 acuminate, fiat, softly villous on both surfaces, margins 

 smooth, base rounded, sheaths shorter than the internodes, 

 loose, upper 2-3 in. long, inflated, narrowed at the top and 

 base, ligule a ridge of fine hairs ; ped. up to 10 in. long, slender, 

 shining; spikes 1-2 in., by T V~ \ in. broad, rhachis rigidly 

 herbaceous with a broad flat midrib and broad veined 

 wings, contracted at the nodes, internodes \-\ in. long, sub- 

 quadrate, tardily disarticulating, stipites of spikes xo~\ in., 

 long, terete, glabrous ; clusters of spikelets \-\ in. diam., often 

 partially sunk in a concavity of the rhachis ; perfect spikelets 

 i long or less, imperfect much shorter; glume I very variable,, 

 coriaceous or thin, acute, II about one-third shorter than III,. 

 5-veined, 2 veins marginal, margins smooth or ciliolate, 

 palea of III subquadrate, truncate, sides obscurely ciliate v 

 angles at top setose. 



