221 



DIGITARIA HUMIFUSA. 



Persoon. Smith. Parneli. Hooker and Arnott. Babington. 



LlNDLEY. DEAK1N. 

 PLATE I.XXIII. 



Syntherisma glahrum, Schrader. 



Panicum " Koch. Gattdtn. 



" " Mackeight. Kr.vrir. 



" lmmifusum, Kunth. 



" sanguinale, Pollich. 



Digitaria Jiliformis, Koel. 



The Glabrous Finger Grass. 



Digitaria — From a finger. Humifusa — Spreading on the ground. 



A rake Grass, having no agricultural merits. Found on 

 sandy soil in Yorkshire, Norfolk, Suffolk, Surrey, and Sussex. 



A native also of France, Italy, Switzerland, Prussia, Holland, 

 and Belgium. 



Stein ascending, polished, striated, having four somewhat 

 broad, brief, flat leaves, with smooth striated sheaths; upper one 

 extending considerably beyond its leaf. Joints three. Inflor- 

 escence digitate, lengthy, linear, and from two to four-branched. 

 Spikelets oval, dorsally compressed, of two glumes and one 

 floret; glumes equal, hirsute, and five-ribbed; inner one deep 

 purple, the others only purplish. Floret of same length as 

 glumes — reddish purple, of two almost equal palea?, striated 

 and polished. Filaments three; anthers brief, violet-coloured, 

 and cloven at either extremity. Stvles two, slender. Stigmas 



