APPENDIX. 307 



3. Prickles from subcompressed bases. 



Styles flesh-coloured B. Balfourianus. 



Prickles from tubereuliforin bases. Styles 

 yellowish-green B. tuber culatus. 



4. Leaves quinate or ternate. Leaflets 



crenate-lobate ; basal leaflet of ter- 

 nate leaves retrorsely bipartite. Styles 



flesh-coloured at the base B. altlwdfolius. 



Leaves ternate, or rarely quinate-pin- 

 nate. Leaflets incised, or coarsely ser- 

 rate. Styles greenish B cwsius. 



No. VI. Osr Serrafalcus. 



The S. racemosus of my Manual (ed. 4) is not the true 

 plant, but a state of S. mollis. It is only recently that I have 

 learned to know the real S. racemosus, of which there is a very 

 fair figure in English Botany, t. 1079. It is not represented in 

 ParnelPs British Grasses, for the plant which is there so named 

 is a glabrous form of S. mollis. 



There is a very valuable character by which to distinguish 

 some of the species of this difficult genus which has long been 

 pointed out by continental botanists, but which I totally mis- 

 understood until after the issue of the fourth edition of my 

 Manual. It is found in the shape of the lower (outer) pale, the 

 sides of which present either a uniform curve from the tip nearly 

 to the base, or have at about a third from the tip an obtuse but 

 very well-marked angle. 



Subjoined are the corrected specific characters of S. mollis 

 and S. racemosus. 



1. S. mollis (Pari.) ; panicle close, erect, compound, or rarely 

 simple ; spikelets ovate, rather compressed, pubescent ; 

 florets closely imbricate, about as long as the straight awn ; 

 sides of lower pale bluntly angular above the middle; 

 leaves and sheaths hairy or downy. 



