CIILOUIDE.t:. 431 



Ocn. l-.TO (1818). LcjitnsfarJii/s CI. V. \\ . Moy. Prim. Fl. Esseg. 

 73 (1H18). 



Spikolotd 2- to nmiiy-flowftrod (very rarely l-flowered), sessile or 

 very shortly lu'dieelluto in 2 rows along 1 side (in one section, along 

 ;j sides of a triquetrous raehis of the slender rai^liis of a simple n\)'\\m 

 or of the minierous braiujhes of a simple j)anicle, flowers all jjerfeet 

 or the upporoncstaminato; rachilla articulate al)(»ve the outer j^lnnies, 

 usually hairy and more or lesa produced above the florets. Km[)ty 

 glumes "i, niemhranous, keeled, acute or obtuse, uneipuil, unawned, 

 first 1 -nerved, second 1-3 nerved; floral ghuno 1-3-nerved, often 

 with a sharply ;2-lobcd apex, the keel produced into a sharp point 

 or awn between or a little below the lobes; palea tliin, shorter than 

 its glunu'. prominently 2-nerved. Stamens 2-3. Styles short, dis- 

 tinct, drain smooth or nearly so, enclosed, but not adherent. 

 Seed loose or easily freed from the pericarp. 



Professor Scribner's reasons for uniting Diphchne io Lcptorhhia 

 seem to me good, as given in Proc. Acad. Phila. 303 (18!)1), Hen- 

 tham in some of his descriptions of Diphtchne defines the floral 

 glume as 1-nerved, but in Flora Austruliensh 7:618 (1878) three 

 of the species there mentioned are described as having the floral 

 glume 3-nerved. 



The following sections have been proposed : 



A. Leptochhxt proper. Spikelets flat, ovate or oval, sessile 

 in the regular rows on the numerous branches of a simple 

 panicle. 



PseudncynQdon, one or two flowers to the spikelet. 

 Eulepfochlod, two or more flowers to the spikelet. 



a. Floral glume mucronate 1 



a. Floral glume emarginate (a) 



b. Sheaths sparingly hairy 2 



b. Sheaths smooth (c) 



c. Spikes 2.5 cm. long 3 



c. Spikes 3.4 cm. long 4 



B. DiplacJuie as a section. Spikes of the panicle long and 

 slender, spikelets almost linear, scattered along the 



