ZOYSIE.E. 65 



ligule 3-G mm. long, decurrent ; blades rigid, rougli. "^0-40 cm. 

 long, 4-6 mm. wide. Panicle t^imple, erect, narrow, '^O-iO cm. 

 long, rays in jiairs ; spatlies yellowish green. 4-5 cm. long, setu- 

 ceonsly acuminate, usually longer than the I'acemes. IJaeemes 'Z.ii 

 cm. long, erect, bearing 1, rarely 2 fertile sj)ikelets, two staminate 

 spike .'tsand other neuter spikelcts. Fertile s])ikelets 11 mm. long, 

 liueiir-obloiig on a callus 4 mm. long, first glume firm, '^-[Jointed. 

 grooved on the 1)ack. (1 mm. long, besides the short awn which is 

 2-0 mm. long; second as long as the first, (U'ltoid. obtuse. ;j- 

 iierved ; third shorter, fourth 4 mm. long, bearing an awn .")-(■). 5 

 mm. long. Pedicellate or staminate s])ikelets Il-IT) mm. long, on 

 filiform [)eilicels, first glume about i;}-iu'rved, second o-uerved, 

 third and fourth 1 mm. long, narrow and ciliate on the margins. 

 Anthers ;}..') mm. long. 



.Mt'xico (Kio Blanco), Pidincv'tMo, in 188(j ; also I'ouud in tropi- 

 cal Africa. 



Tribe III.— ZOYSIE^. 



Spikelets solitary, or often in grou})s of 2-(> at each joint of the 

 main axis, eacOi grouj) falling off entire from the continuous rachis. 

 Spikelets usually 1 -flowered, th(i floral glume awidess (awned in 

 Sfhiilfiivrd), mend)ranous ; emj)ty glumes firmer and often awned, 

 the first usually the largest. Palea usually shorter than its glume, 

 sometimes 0. Stamens ;J or fewer. Style free, stigmas plumose. 

 Endn'yo nearly half us large as the unfurrowed obcomjjressed 

 grain. 



A. rirou]is of spikelets usually numerous, in solitary, terminal 



spikes or racemes. 



a. Spikelets 8-4 together, each group surrounded by an in- 

 durated false invohnn'o consisting of the first glume of each 

 spikelet (l.')) 



a. Spikelets ternate, strictly sessile, the outer ones 2-flowei'ctl. 

 staminate, the inner 1-llowered, pistillate or perfect. (Id) 



a. Spikelcts 3 to together, the groups distinctly pt'di- 

 cellate (b^ 



