i b TRIAXDRIA. MONOGYATA. 



spikes; spikele!s many-Howered, (5 or 6) ova^e, or lau- 

 ci"(^la,e, somewhat leseiTibiing- those of Poa, but more 

 comi'.ressed; vulves of ihe calix and corolla similar, and 

 nearly equal, persis'eiit; outer valve of the calix about 9» 

 nerved, seed 3-sided, ariliate, gibbous, ti-ansversely ru- 

 gose, and grooved on one side. (Character Irom E In- 

 (ilea ) 



Species. \. E. Tmllca. 



Ti-e very few g-enuine sj)ecies of this g^nns are found 

 in India, Barbarv, and Xonh America. The C'l/nosurits 

 clurus of Europe, is also referred to this genus by La- 

 mark. 



108. *()XYDENIA.t 



Spikes panirtjlate, filirorm; spiculi 3 to 4- 

 flo\Nercd, alternatini^ on a 1 -sided raciiis. — 

 Cotnmon calix 2 valved, suhulately acuiiwiiaie, 

 longer than tlsc ilosculi contained, persistent; 

 valves nninervial. Corolla a-vaived, minute, 

 deciduous, valves obtuse, witli or vvithoiit a ter- 

 minal awn. Setd roundish, naked, smootli, and 

 somewhat giijbous. 



An American genv.s of g-ras-es existing chiefly witliin 

 the tropics; nearly allied to E'euslne, but producing- l;ng 

 filiform spikes, dispos.*d in panicles; leaves, in some spe- 

 cies, scattered with glandular hairs; ll.e calix and flowers 

 -of different forms, and the latter decidous with the seed, 

 which is naked, nearly spbenca! and smooth. 



Species. 1. O. ^atitviiiata. Punicle simple, spikes very 

 long-, numerous and attenuated; sum.ewhat subdivided 

 near the base; snikelets about 3-flowered; flowers includ- 

 ed in the culix; leaves fla*^, subulate at the point, and with 

 the slieaths scaUered with g'.andulons hairs. 



E/ensine mncronatG? AJicH. 1. p. 62. Pursh, 1. p 87- 

 Kr.r.ioTT, 1. p. 175. 



Root annu:d. Culm erect, round, 2 to 3 feet high. 

 Leavf 9 8 to 12 inches long-, 3 to 4 lines wide, slightly 

 hairy, the sheath more conspicuously so tovva;ds the 

 nodes; tlie pubescence exmliiig a viscous and somewlial 

 acid fluid; panicle simple, 12 to 18 inches long; spikes 

 nuneous, (30 or 4u) filiform, alternate, 3 to 5 inches 

 long, a linle subdivided near the base; calix about 3-flow- 



•j- From o|y5, cicid, <\nd x^r^v, a q-land,- because the pubesi 

 cence exudes an acid fluid. 



